Flights from Baltimore/Washington (BWI) to San Antonio (SAT)

Book low fares from Baltimore/Washington (BWI) to San Antonio with Southwest Airlines®. It’s easy to find the Baltimore/Washington International Airport/Thurgood Marshall to San Antonio International Airport flight to make your booking and travel a breeze. Whether you’re traveling for business or pleasure, solo or with the whole family, you’ll enjoy flying Southwest®. Have flexible travel dates? Plug them into the Low Fare Calendar and see the lowest fares available within your travel window. You may also want to browse Southwest Vacations® to see special offers and package deals on flights, hotels, rental cars, and more.

Explore your options and book your Baltimore/Washington (BWI) to San Antonio flight with Southwest today!

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Best Airline in the U.S. and North America & Best Economy and Low Cost Airline in North America.

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Low fare alert

Baltimore/Washington (BWI), MD to San Antonio, TX

departing on 12/04

one-way starting at*

$154
Book now

*Restrictions and exclusions apply. Seats and dates are limited. Select markets. 48 travel days available.

Check out Baltimore/Washington (BWI) to San Antonio flights and book yours now!

Middle seats open through November 30

Full exchange of fresh, outdoor air every 2-3 minutes while inflight

Face coverings required

Flight details

Average flight time: 3 hours 48 minutes

Departing from: Baltimore/Washington International Airport/Thurgood Marshall (BWI)

Arriving at: San Antonio International Airport (SAT)

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Route information

2

Nonstop flightsper day

12

Daily flights

33

Weekly flights

5

Flightsbefore noon

5

Flightsbetween
12-6pm

1

Flightafter 6pm

View our interactive map

Based on DOT published scheduled average flights Monday-Friday between 10/9/2020 and 12/31/2020, as of 10/9/2020.

Travel tips

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Infancy policy

One child over 14 days and under two (2) years of age, not occupying a seat, may be carried free of charge when traveling with an adult (12 years of age or older). Learn more.

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Pet policy

Customers flying with a pet are subject to a pet fare. To learn more about traveling with your furry friend, explore the Southwest® pet policy.

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Unaccompanied minor

Minors under the age of 18 are not permitted to fly unaccompanied on international flights or any itinerary that includes an international flight. Learn more.

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Bags fly free®1

Start packing! Every ticketed Customer’s first two checked bags are free. Learn more.

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The Southwest travel experience

At Southwest, we know it takes more than great deals on San Antonio airfares and convenient scheduling options to make your trip memorable. So from booking to boarding, we offer services and features designed to make your travel from Baltimore/Washington (BWI) to San Antonio the best it can be. Find out more about the Southwest® Experience before you book your Baltimore/Washington International Airport/Thurgood Marshall to San Antonio International Airport flight.

Flying with Southwest is simple and fun, no matter which of our dozens of exciting destinations you choose. And when you search for your next flight to San Antonio, you know you won’t be surprised at checkout. Low fares, no hidden fees. That’s our Transfarency® promise. And, as always, bags fly free. Enroll in our Click 'N Save® emails and stay up to date on our latest flight deals. Looking for tours, activities, and more hidden gems to add to your San Antonio adventure? Explore Southwest Airlines® Experiences and earn Rapid Rewards® points when you fly.

1First and second checked bags. Weight and size limits apply.

2Fare difference may apply.

Questions we hear the most

How long is the flight from Baltimore/Washington (BWI) to San Antonio?

The average flight time from Baltimore/Washington (BWI) to San Antonio is 3 hours 48 minutes.

How many Southwest flights from Baltimore/Washington (BWI) to San Antonio occur daily?

There are 12 flights daily from Baltimore/Washington (BWI) to San Antonio on Southwest Airlines.

Does Southwest fly nonstop from Baltimore/Washington (BWI) to San Antonio?

Southwest flies nonstop from Baltimore/Washington (BWI) to San Antonio 2 times daily.

What day is it cheapest to fly from Baltimore/Washington (BWI) to San Antonio?

To find the cheapest day and time to fly Baltimore/Washington (BWI) to San Antonio with Southwest, check out our Low Fare Calendar.

Can I rent a car at San Antonio International Airport?

You can rent a car at San Antonio International Airport—book yours with your flight.

Can I change my flight reservation for my flight from Baltimore/Washington (BWI) to San Antonio?

Yes! Flights from Baltimore/Washington (BWI) to San Antonio—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.

Where can I find the status of my flight from Baltimore/Washington (BWI) to San Antonio?

Check the status of your upcoming Southwest flight here.

Where can I find answers to other questions about flying from Baltimore/Washington (BWI) to San Antonio with Southwest?

Check out the Southwest Airlines® FAQs for answers about everything Southwest.