$167 Cheap United flights Baltimore (BWI) to San Diego (SAN)

View $167 flight on Thu, Sep 4, 2025Opens in a new window

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$167 Cheap United flights Baltimore (BWI) to San Diego (SAN)

Prices were available within the past 7 days and start at $167 for one-way flights and $338 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Sep 4 - Tue, Sep 9
BWI
Baltimore
SAN
San Diego
$338 Roundtrip, found 1 hour ago
$338
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Sep 4 from Baltimore to San Diego, returning Tue, Sep 9, priced at $338 found 1 hour ago
Flights from Baltimore (BWI) to San Diego (SAN)
Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, Spirit Airlines, Sun Country Airlines, United
Popular airline
Spirit Airlines
Distance
2290 mi
Average flight time
3 hours 32 mins

Frequently asked questions

How much is a United Airlines flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Diego Intl. Airport (SAN)?
Use the "Price (lowest to highest)" filter on Expedia to find cheap United Airlines round-trip flights from $338 from BWI to SAN. Affordable one-way fares from $167 are available as well.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from BWI to SAN with United Airlines?
January is one of the least expensive months to fly to San Diego with United Airlines. You could also find excellent prices on one-way and round-trip tickets in November.
What is the cheapest time to book flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Diego Intl. Airport (SAN) with United Airlines?
Search for cheap United Airlines flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Diego Intl. Airport (SAN) one to three months before your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare class and itinerary, the best day to book a domestic flight is generally Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Diego Intl. Airport (SAN)?
To find out if there's a direct route from BWI to SAN with United Airlines or another carrier, check the "Nonstop" filter when browsing for flights.
What is the earliest United Airlines flight from BWI to SAN?
To find the earliest departure from BWI to SAN with United Airlines, filter your search by "Early Morning" and "Morning." Choosing an early flight usually means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in San Diego?
United Airlines flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Diego arrive at San Diego Intl. Airport (SAN). This is the main gateway here.
Why fly with United Airlines from BWI to SAN?
A rewarding loyalty program and the ability to rack up points through United Mileage Plus are the start of the reasons to jet off from BWI to SAN with United Airlines. Plus, when you sign up to our One Key™ program, you can receive OneKeyCash™* on top of United Airlines's loyalty program earnings. It's yours to spend on future travel plans.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my United Airlines flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Diego Intl. Airport (SAN)?
Depending on your ticket type, a fee may apply if you cancel or change your flight more than 24 hours after it's been confirmed. To secure flexible plane tickets, select our "Changes included" or "No cancel fee" filter when searching for flights. For more details on canceling or changing your reservation, head to "Trips," select your flight and tick "Manage Booking."

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