A large bridge spanning a body of water with a city skyline in the background.

$99 Cheap Flights from Boise (BOI) to San Diego (SAN)

View $99 flight on Thu, Oct 29, 2026Opens in a new window

Popular airlines from Boise Airport (BOI) to San Diego Intl. Airport (SAN)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 30% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Boise to San Diego (BOI-SAN)

Prices were available within the past 7 days and start at $99 for one-way flights and $197 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Sat, Oct 31 - Tue, Nov 10
BOI
Boise
SAN
San Diego
$197 Roundtrip, found 1 day ago
$197
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Sat, Oct 31 from Boise to San Diego, returning Tue, Nov 10, priced at $197 found 1 day ago
Alaska Airlines
Wed, Oct 14 - Wed, Oct 14
BOI
Boise
SAN
San Diego
$201 Roundtrip, found 8 hours ago
$201
Roundtrip
found 8 hours ago
Select Alaska Airlines flight, departing Wed, Oct 14 from Boise to San Diego, returning Wed, Oct 14, priced at $201 found 8 hours ago
Frontier Airlines
Mon, Oct 19 - Wed, Oct 21
BOI
Boise
SAN
San Diego
$202 Roundtrip, found 5 hours ago
$202
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Mon, Oct 19 from Boise to San Diego, returning Wed, Oct 21, priced at $202 found 5 hours ago
Frontier Airlines
Mon, Oct 19 - Mon, Oct 26
BOI
Boise
SAN
San Diego
$202 Roundtrip, found 5 hours ago
$202
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Mon, Oct 19 from Boise to San Diego, returning Mon, Oct 26, priced at $202 found 5 hours ago
Bargain Flight
Sat, Dec 5 - Tue, Dec 15
BOI
Boise
SAN
San Diego
$205 Roundtrip, found 4 hours ago
$205
Roundtrip
found 4 hours ago
Select Bargain Flight flight, departing Sat, Dec 5 from Boise to San Diego, returning Tue, Dec 15, priced at $205 found 4 hours ago
Southwest Airlines
Tue, Oct 27 - Wed, Oct 28
BOI
Boise
SAN
San Diego
$206 Roundtrip, just found
$206
Roundtrip
just found
Select Southwest Airlines flight, departing Tue, Oct 27 from Boise to San Diego, returning Wed, Oct 28, priced at $206 just found
Delta
Tue, Dec 1 - Sat, Dec 5
BOI
Boise
SAN
San Diego
$207 Roundtrip, found 19 hours ago
$207
Roundtrip
found 19 hours ago
Select Delta flight, departing Tue, Dec 1 from Boise to San Diego, returning Sat, Dec 5, priced at $207 found 19 hours ago
Alaska Airlines
Wed, Dec 9 - Wed, Dec 9
BOI
Boise
SAN
San Diego
$208 Roundtrip, found 11 hours ago
$208
Roundtrip
found 11 hours ago
Select Alaska Airlines flight, departing Wed, Dec 9 from Boise to San Diego, returning Wed, Dec 9, priced at $208 found 11 hours ago
Frontier Airlines
Mon, Oct 5 - Sat, Oct 10
BOI
Boise
SAN
San Diego
$209 Roundtrip, found 5 hours ago
$209
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Mon, Oct 5 from Boise to San Diego, returning Sat, Oct 10, priced at $209 found 5 hours ago
Frontier Airlines
Mon, Oct 19 - Wed, Oct 28
BOI
Boise
SAN
San Diego
$211 Roundtrip, found 1 day ago
$211
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Mon, Oct 19 from Boise to San Diego, returning Wed, Oct 28, priced at $211 found 1 day ago

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 $1,239
TIJ
General Abelardo L. Rodriguez Intl.
Average driving time to city center26 min
Flights from $1,239
Select flight to McClellan-Palomar CLD. Cheapest option available. Average driving time to city center is 38 minutes. Flights from $464
CLD
McClellan-Palomar
Cheapest
Average driving time to city center38 min
Flights from $464

What you need to know for your flight from Boise to San Diego Intl.

Boise (BOI) to San Diego (SAN) at a glance

Travel from Boise (BOI) to San Diego (SAN) with a range of airlines on this convenient domestic short-haul route. Discover options for both full-service and low-cost carriers to find the best itinerary that aligns with your budget and travel plans. Whether you're after cheap flights from Boise or simply want to enjoy the sights and neighborhoods of San Diego, you'll find all the essential details for your journey from Boise Airport to San Diego International Airport right here.

  • Fastest flight duration: around 2h 15m non-stop
  • Route distance: roughly 700 miles (1,130 km)
  • Flights per week: around 25+ flights with multiple daily departures on average
  • Typical fares (one-way): economy tickets often range from $70–$305, depending on seasonality and how far ahead you book

Flights from Boise Airport (BOI) to San Diego International Airport (SAN)

Based on recent traveler bookings, here are the top airlines favored for flights from Boise to San Diego, particularly for non-stop and one-stop options. Popular layover spots include Salt Lake City International Airport (SLC) with about a 1-hour layover, Seattle-Tacoma International Airport (SEA) offering around 1 hour and 15 minutes, and San Francisco International Airport (SFO), also with a 1 hour and 15-minute layover. These choices provide you the flexibility to balance price, overall travel time, and cabin class to secure the best itinerary for your journey.

  • Alaska Airlines: This full-service airline provides both non-stop and one-stop options, with one-way fares generally priced between $70 and $320. It offers around 51% of the departures on this route, with non-stop flights taking approximately 2 hours and 15 minutes.
  • Southwest Airlines: Known as a budget-friendly option, this low-cost carrier features non-stop and one-stop flights, with one-way tickets usually ranging from $70 to $305. Southwest accounts for about 28% of departures, with a typical non-stop travel time of 2 hours and 15 minutes.
  • Delta: As a full-service airline, Delta provides one-stop service with one-way fares typically between $70 and $305. It makes up around 12% of departures on this route, with an in-flight duration of 3 hours and 15 minutes, totaling about 4 hours and 45 minutes including layover time.
  • United: Another full-service option, United offers one-stop flights with one-way fares ranging from $80 to $320. It represents roughly 5% of the departures, featuring an in-flight time of 3 hours and 15 minutes, leading to a total journey of about 4 hours and 45 minutes when including the layover.
  • Hawaiian Airlines: This full-service airline specializes in non-stop service, with one-way fares generally falling between $90 and $295. It accounts for approximately 1% of departures on this route, with a total travel time of 2 hours and 15 minutes.

Travelers flying from Boise to San Diego have the option to upgrade their experience. Alaska Airlines provides first class and business class, while Delta features first class and premium economy class for a more comfortable journey.

Best time to fly from Boise (BOI) to San Diego (SAN)

The most popular months for travelers flying from Boise to San Diego are February, March, and April, 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, October usually offers the lowest average one-way fare around $135. Flight availability peaks in July, with approximately 33 flights per week, making it easier to find convenient departure times. February has the fewest flights, with approximately 22 flights per week.

  • Cheapest time to fly: October usually offers good deals with average one-way fare around $135, roughly 16% cheaper than the yearly average.
  • More budget-friendly months to fly: April and January typically offer average one-way fares of around $150.
  • Most flight options: July has the highest number of flights from Boise to San Diego, with approximately 33 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)Average23$151
February56.8°F (13.8°C)Slightly High22$160
March58.1°F (14.5°C)Slightly High28$193
April60.6°F (15.9°C)Slightly High24$150
May62.6°F (17.0°C)Slightly Low26$159
June66.4°F (19.1°C)Average30$170
July70.5°F (21.4°C)Average33$180
August72.3°F (22.4°C)Slightly Low27$164
September72.0°F (22.2°C)Slightly Low23$152
October68.2°F (20.1°C)Average26$135
November62.6°F (17.0°C)Average26$158
December57.4°F (14.1°C)Average26$170

*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 routes from Boise (BOI) to San Diego (SAN)

  • Boise to San Diego (BOI-MYF): Montgomery Field Airport (MYF) is located approximately 6 miles from San Diego International Airport (SAN).
  • Boise to San Diego (BOI-SDM): Brown Field Municipal Airport (SDM) lies about 17 miles from San Diego International Airport (SAN).
  • Boise to Carlsbad (BOI-CLD): McClellan-Palomar Airport (CLD) is roughly 28 miles distant from San Diego International Airport (SAN).

How to find the best prices for flights from Boise (BOI) to San Diego (SAN)

Getting some of the best deals on flights from Boise 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 found when booking 2-8 weeks in advance, which aligns with when most travelers make their reservations. Departures in the morning, between 5 a.m. and 12 p.m., tend to be less expensive and are the most popular times to fly. Additionally, flying on Tuesday generally offers lower prices, while Friday remains 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 Boise Airport

San Diego welcomes travelers from Boise 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 located about 0.1 miles away on foot, while Middletown Station, a metro station, is approximately 2.3 miles from the airport and typically reached by car. Additionally, B Street Cruise Ship Terminal, a cruise terminal, is situated about 3 miles away by car, providing various travel options for visitors.

Frequently asked questions

How much does a flight from Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.) cost?
You can find cheap one-way flights from $99 and cheap return flights from $197 Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.) with Expedia. One-way flights typically cost between $118 and $666, and return flights often range between $216 and $1047. 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 Boise, ID (BOI) 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 Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.)?
The cheapest month to fly from BOI to SAN is October when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.)?
Hawaiian Airlines offers around 11 weekly direct flights from BOI to SAN.
What is the cheapest airline that flies from Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.)?
Spirit Airlines is one of the cheapest airlines offering connecting flights from Boise (BOI) to San Diego (SAN), starting from around $104. 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 Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.)?
To find a cheap flight from Boise, ID (BOI) 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 Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.)?
The best airline to fly with from Boise, ID (BOI) to San Diego, CA (SAN) will differ from traveler to traveler. If you like to fly early, Alaska Airlines offers early morning flights. If price is the most important factor, WN typically offers the lowest fares. Alaska Airlines also offers the most daily flights from Boise to San Diego, 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 Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.)?
There are approximately 1 nonstop flights per day from (BOI) to San Diego Intl. (SAN). For more options, look at flights that include layovers.
What is the earliest flight from Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from BOI to SAN. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.)?
The most popular departure times for flights from Boise, ID (BOI) to San Diego, CA (SAN) are in the early morning, from 6am to 9am. About 32% of passengers prefer this time window. Many major carriers, including Alaska Airlines, Southwest Airlines, and United Airlines, operate flights during this time. This timing works well because it lets you arrive in San Diego with plenty of time to enjoy the day ahead.
How long does it take to fly from Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.)?
Flying nonstop from BOI to SAN takes around 2 hours 20 minutes, with the route covering approximately 751 miles. Flights with a layover typically take 3 hours longer than direct options. 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 Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.)?
First class is available on flights from BOI to SAN. First class cabins are available on:

  • Delta Air Lines
  • American Airlines
  • United Airlines

How much is a business class flight from Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.)?
A direct, return business class ticket from Boise, ID (BOI) to San Diego, CA (SAN) typically costs between $1,092 - $1,476. A non-stop, one-way business class flight is usually around $278 - $418. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.) flight with Expedia?
It's easy to earn miles on a Boise, ID (BOI) 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 BOI (BOI)?
From BOI (BOI), you can fly into San Diego Intl. (SAN) to reach San Diego. Some flights may connect through major hubs like San Francisco Intl. (SFO), Los Angeles Intl. (LAX), 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 Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.) at the last minute?
Typically, booking a last minute flight from Boise, ID (BOI) 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 Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.) flight and hotel package?
Securing a Boise, ID (BOI) 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 Boise, ID (BOI) to San Diego, CA (SAN-San Diego Intl.)?
If you booked your Boise, ID (BOI) 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
Boise
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$197
Distance
750 mi
Average flight time
1 hour 51 mins

Book with confidence

Boise to San Diego Flights

The cheapest times to fly from Boise 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 Boise to San Diego are during the month of October. You can find some of the cheapest flights from Boise to San Diego with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Boise 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 Boise 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 Boise to San Diego in 2026. You can also book with separate airlines for your outbound and return journeys, from $99 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 Boise 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 Boise 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.

 

Boise to San Diego Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

Explore a world of travel with Expedia