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$129 Cheap Flights from Baltimore (BWI) to San Diego (SAN)

View $129 flight on Thu, Sep 24, 2026Opens in a new window

Popular airlines from Baltimore Washington Intl. Airport (BWI) to San Diego Intl. Airport (SAN)

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Cheap Flights from Baltimore to San Diego (BWI-SAN)

Prices were available within the past 7 days and start at $129 for one-way flights and $258 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Sep 24 - Thu, Oct 1
BWI
Baltimore
SAN
San Diego
$258 Roundtrip, just found
$258
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Sep 24 from Baltimore to San Diego, returning Thu, Oct 1, priced at $258 just found
Frontier Airlines
Fri, Oct 2 - Mon, Oct 5
BWI
Baltimore
SAN
San Diego
$268 Roundtrip, found 1 hour ago
$268
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, Oct 2 from Baltimore to San Diego, returning Mon, Oct 5, priced at $268 found 1 hour ago
Frontier Airlines
Fri, Oct 2 - Sun, Oct 4
BWI
Baltimore
SAN
San Diego
$278 Roundtrip, just found
$278
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Oct 2 from Baltimore to San Diego, returning Sun, Oct 4, priced at $278 just found
Frontier Airlines
Fri, Sep 25 - Fri, Oct 2
BWI
Baltimore
SAN
San Diego
$288 Roundtrip, found 1 day ago
$288
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Sep 25 from Baltimore to San Diego, returning Fri, Oct 2, priced at $288 found 1 day ago
Frontier Airlines
Thu, Sep 24 - Tue, Oct 13
BWI
Baltimore
SAN
San Diego
$298 Roundtrip, found 21 hours ago
$298
Roundtrip
found 21 hours ago
Select Frontier Airlines flight, departing Thu, Sep 24 from Baltimore to San Diego, returning Tue, Oct 13, priced at $298 found 21 hours ago
Frontier Airlines
Thu, Sep 24 - Sun, Sep 27
BWI
Baltimore
SAN
San Diego
$298 Roundtrip, just found
$298
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Sep 24 from Baltimore to San Diego, returning Sun, Sep 27, priced at $298 just found
Delta
Wed, Sep 23 - Mon, Sep 28
BWI
Baltimore
SAN
San Diego
$303 Roundtrip, just found
$303
Roundtrip
just found
Select Delta flight, departing Wed, Sep 23 from Baltimore to San Diego, returning Mon, Sep 28, priced at $303 just found
Southwest Airlines
Wed, Sep 23 - Mon, Sep 28
BWI
Baltimore
SAN
San Diego
$313 Roundtrip, just found
$313
Roundtrip
just found
Select Southwest Airlines flight, departing Wed, Sep 23 from Baltimore to San Diego, returning Mon, Sep 28, priced at $313 just found
American Airlines
Sat, Sep 19 - Mon, Sep 21
BWI
Baltimore
SAN
San Diego
$323 Roundtrip, just found
$323
Roundtrip
just found
Select American Airlines flight, departing Sat, Sep 19 from Baltimore to San Diego, returning Mon, Sep 21, priced at $323 just found
Alaska Airlines
Wed, Sep 30 - Mon, Oct 5
BWI
Baltimore
SAN
San Diego
$325 Roundtrip, just found
$325
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Sep 30 from Baltimore to San Diego, returning Mon, Oct 5, priced at $325 just found

Alternative airports near San Diego

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to General Abelardo L. Rodriguez Intl. TIJ. Average driving time to city center is 26 minutes. Flights from $954
TIJ
General Abelardo L. Rodriguez Intl.
Average driving time to city center26 min
Flights from $954

What you need to know for your flight from Baltimore Washington Intl. Thurgood Marshall to San Diego Intl.

Baltimore (BWI) to San Diego (SAN) at a glance

Travel from Baltimore (BWI) to San Diego (SAN) with a range of airlines on this domestic long-haul route. Whether you prefer full-service or budget-friendly carriers, you can compare various options to discover the itinerary that aligns with your budget and schedule while you delve into the iconic attractions and vibrant neighborhoods of San Diego. Check the essential details for flights departing from Baltimore Washington International Thurgood Marshall Airport (BWI) to San Diego International Airport (SAN).

  • Fastest flight duration: around 5h 45m non-stop
  • Route distance: roughly 2,300 miles (3,700 km)
  • Flights per week: around 30+ flights with multiple daily departures on average
  • Typical fares (one-way): economy tickets often range from $115–$450, depending on seasonality and how far ahead you book

Flights from Baltimore Washington International Thurgood Marshall Airport (BWI) to San Diego International Airport (SAN)

According to recent traveler bookings, the top airlines flying from Baltimore to San Diego are favored for both non-stop and one-stop journeys. Common layover spots include Charlotte-Douglas International Airport (CLT) with about a 1-hour layover, Denver International Airport (DEN) featuring a 1.5-hour layover, and Dallas-Fort Worth International Airport (DFW), which has roughly a 1-hour layover. This variety allows you to customize your itinerary by balancing price, total travel time, and cabin class to find the best option for your trip.

  • Southwest Airlines: This budget-friendly airline provides both non-stop and one-stop flights, with one-way ticket prices typically falling between $120 and $470. It represents around 53% of the departures on this route, boasting an average non-stop flight duration of 5 hours and 45 minutes.
  • American Airlines: A comprehensive service airline, American Airlines offers one-stop flights, with one-way fares generally ranging from $115 to $435. It accounts for about 16% of departures on this route, featuring an in-flight duration of 6 hours and 45 minutes, and an overall travel time of approximately 8 hours, including layover.
  • Delta: This full-service airline also provides one-stop service, with one-way fares typically between $140 and $540. Delta comprises approximately 16% of the departures for this route, with an in-flight time of 6 hours and 45 minutes, leading to a total journey duration of around 8 hours, factoring in the layover.
  • United: United Airlines, offering both non-stop and one-stop options, features one-way fares usually ranging from $125 to $520. It represents roughly 11% of the departures on this route, with a typical one-stop flight time of 6 hours and 45 minutes, resulting in a total travel time of about 8 hours.
  • Frontier Airlines: As a low-cost option, Frontier Airlines provides one-stop services with one-way fares typically between $115 and $245. It accounts for approximately 4% of the departures on this route, with an in-flight duration of 6 hours and 45 minutes and a total journey time of about 8 hours, including layover.

Travelers flying from Baltimore to San Diego can opt to enhance their experience with upgraded flight options. Delta provides both first class and premium economy cabins, while American Airlines and United each offer first class service for a more luxurious journey.

Best time to fly from Baltimore (BWI) to San Diego (SAN)

The most popular months for travelers flying from Baltimore to San Diego are March, April, and December, when peak temperatures in San Diego reach up to 60.6°F in April. If you prefer quieter travel, consider September, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 72°F. For better deals, November usually offers the lowest average one-way fare around $215. Flight availability peaks in December, with approximately 43 flights per week, making it easier to find convenient departure times. January has the fewest flights, with approximately 21 flights per week.

  • Cheapest time to fly: November usually offers good deals with average one-way fare around $215, roughly 10% cheaper than the yearly average.
  • More budget-friendly months to fly: October, September, and February typically offer average one-way fares of around $222.
  • Most flight options: December has the highest number of flights from Baltimore to San Diego, with approximately 43 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January57.4°F (14.1°C)Average21$237
February56.8°F (13.8°C)Average25$225
March58.1°F (14.5°C)High28$241
April60.6°F (15.9°C)High30$242
May62.6°F (17.0°C)Low24$269
June66.4°F (19.1°C)Average36$253
July70.5°F (21.4°C)Average27$281
August72.3°F (22.4°C)Low30$243
September72.0°F (22.2°C)Low31$222
October68.2°F (20.1°C)Average39$220
November62.6°F (17.0°C)Average36$215
December57.4°F (14.1°C)High43$251

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative route from Baltimore (BWI) to San Diego (SAN)

  • Washington to San Diego (DCA-SAN): Ronald Reagan Washington National Airport (DCA) is located approximately 30 miles from Baltimore Washington International Thurgood Marshall Airport (BWI). On this route, one-way economy ticket prices generally fall between $95 and $430, influenced by the season and timing of the booking. Travelers can choose from both non-stop and one-stop flights, with common layover points at Denver International Airport (DEN) and O'Hare International Airport (ORD). Major airlines servicing this route include Alaska Airlines and the low-cost Frontier Airlines. Additionally, there are options for business and first-class service available on this route.

How to find the best prices for flights from Baltimore (BWI) to San Diego (SAN)

Getting some of the best deals on flights from Baltimore to San Diego is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually available when booking at least two months in advance, although most travelers reserve their flights two to eight weeks ahead. Evening departures from 6 PM to midnight often offer lower prices, while morning flights from 5 AM to noon are the most popular. Additionally, flying on Wednesdays typically results in cheaper fares, despite Fridays being the busiest travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.* Find San Diego hotel and flight deals.
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at San Diego International Airport from Baltimore Washington International Thurgood Marshall Airport

San Diego welcomes travelers from Baltimore with a range of transport options based on price, convenience, and proximity. Here's how to reach San Diego efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in San Diego, with options including free hotel shuttles and private rides, which can be arranged in advance with your hotel.
  • Car rental: Renting a car from San Diego International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at San Diego International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From San Diego International Airport, Seaport, a seaport, is conveniently located about 0.1 miles away on foot, while B Street Cruise Ship Terminal, a cruise terminal, is about 3 miles from the airport and best accessed by car. Additionally, Middletown Station, a metro station, is approximately 2.3 miles away by car, providing further transport options for travelers.

Frequently asked questions

How much does a flight from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.) cost?
You can find cheap one-way flights from $129 and cheap return flights from $258 Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.) with Expedia. One-way flights generally range between $165 and $2564, and roundtrip flights usually range from $310 to $2825. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.)?
February is the cheapest month to fly from Baltimore (BWI) to San Diego (SAN), with average return fares around $346. This is about 14% lower than the average price throughout the year, as winter months often see reduced travel demand. Other affordable months to consider are January and September.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.)?
Enter BWI to SAN and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.)?
Sun Country Airlines is one of the cheapest airlines offering connecting flights from Baltimore (BWI) to San Diego (SAN), with round-trip tickets starting from around $387. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.)?
To find a cheap flight from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.)?
The best airline to fly with from Baltimore, MD (BWI) to San Diego, CA (SAN) will differ from traveler to traveler. If you like to fly early, WN offers early morning flights. If price is the most important factor, WN typically offers the lowest fares. WN offers the most daily flights from BWI to SAN, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.)?
For flights from Baltimore (BWI) to San Diego (SAN), February and September are the best months to travel. February offers return flights at around $346, making it a budget-friendly choice, while September is popular, ensuring a vibrant travel experience with plenty of options.*Prices based on flights available on Expedia in the last year.
How many flights per day from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.)?
You can find approximately 3 nonstop flights per day from Baltimore Washington Intl. Thurgood Marshall (BWI) to San Diego Intl. (SAN). For more options, look at flights that include layovers.
What is the earliest flight from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.)?
The earliest flight from Baltimore (BWI) to San Diego (SAN) typically leaves at 5:00 AM, operated by American Airlines. This seasonal service is available in December, allowing you to enjoy a full day in sunny San Diego. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.)?
For flights from Baltimore (BWI) to San Diego (SAN), the most popular departure times are in the early morning, from 6am to 9am. About 37% of passengers choose this time window. Many major carriers, including Southwest Airlines and Delta, offer flights during this time. This timing is favored as it helps you maximize your day in San Diego upon arrival.
How long does it take to fly from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.)?
A nonstop flight from BWI to SAN typically takes around 5 hours 50 minutes, covering approximately 2,291 miles. Connecting flights on this route usually add 2 hours to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.)?
First class seats are offered on the BWI to SAN route. First class cabins are available on:

  • United Airlines
  • American Airlines
  • Delta Air Lines

How do I earn miles on a Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.) flight with Expedia?
It's easy to earn miles on a Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for San Diego from Baltimore Washington Intl. Thurgood Marshall (BWI)?
If you're planning to travel to San Diego from Baltimore Washington Intl. Thurgood Marshall (BWI), you can fly into San Diego Intl. (SAN) Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA), O'Hare Intl. (ORD), Denver Intl. (DEN) before reaching San Diego. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.) at the last minute?
Typically, booking a last minute flight from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.) flight and hotel package?
Securing a Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.) San Diego Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.)?
If you booked your Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to San Diego, CA (SAN-San Diego Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, Sun Country Airlines, United
Roundtrip price
$258
Distance
2290 mi
Average flight time
3 hours 18 mins

Book with confidence

Baltimore to San Diego Flights

The cheapest times to fly from Baltimore to San Diego

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Baltimore to San Diego are during the month of September. You can find some of the cheapest flights from Baltimore to San Diego with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Baltimore to San Diego

Sunday is one of the best days to book for cheap flights from Baltimore to San Diego: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Baltimore to San Diego

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Baltimore to San Diego in 2026. You can also book with separate airlines for your outbound and return journeys, from $129 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Baltimore to San Diego flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Baltimore to San Diego airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Baltimore to San Diego Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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