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$55+ Cheap flights from Washington, D.C. (WAS) to San Antonio (SAT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SAT
Aug 24 — Aug 311
Sun 8/24
Sun 8/31
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. to San Antonio are usually found in August or July, booked 51 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Cheap flight deals from Washington, D.C. to San Antonio

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to San Antonio (SAT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 19, 2025.

Round-trip from

$143
(Cheapflightsfares)

One-way from

$55
(FlightHub)

Popular in

December

Cheapest in

August

Average price

$309

Good round-trip deal

$239 or less

Good one-way deal

$155 or less
From Washington, D.C. (WAS) to San Antonio
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One-way flight from Washington, D.C. (WAS) to San Antonio
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Highest demand for flights based on searches. 8% potential increase in price ($34 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Washington, D.C. (WAS) to San Antonio.
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Price to beat on a one-way flight from Washington, D.C. (WAS) to San Antonio.
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Find flight deals from Washington, D.C. to San Antonio

Cheapest flights from Washington, D.C. to San Antonio
Explore the most affordable flight options available from Washington, D.C. to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 19, 2025.

This Priceline deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/296:30 amBWI - SAT
1 stop8h 23mMultiple Airlines
Fri 9/55:40 pmSAT - BWI
1 stop5h 37mMultiple Airlines
Deal found 8/18$153
This eDestinos deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/58:16 amBWI - SAT
1 stop9h 31mSpirit Airlines
Sat 9/138:37 pmSAT - BWI
1 stop9h 24mSpirit Airlines
Deal found 8/16$157
This FlightHub deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/296:30 amBWI - SAT
1 stop8h 23mSpirit Airlines
Sun 8/313:18 pmSAT - BWI
1 stop12h 57mSpirit Airlines
Deal found 8/18$160
This Expedia deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/56:22 amBWI - SAT
1 stop11h 08mFrontier
Fri 9/125:40 pmSAT - BWI
1 stop5h 37mFrontier
Deal found 8/17$163
This Frontier deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/56:22 amBWI - SAT
1 stop11h 08mFrontier
Sun 9/79:55 amSAT - BWI
1 stop6h 47mFrontier
Deal found 8/17$164
This FlightHub deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/135:45 amBWI - SAT
1 stop14h 47mMultiple Airlines
Mon 9/155:40 pmSAT - BWI
1 stop5h 37mMultiple Airlines
Deal found 8/18$165
This FlightHub deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/118:14 pmBWI - SAT
1 stop21h 16mFrontier
Mon 9/155:40 pmSAT - BWI
1 stop5h 37mFrontier
Deal found 8/17$166
This FlightHub deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/205:45 amBWI - SAT
1 stop14h 47mMultiple Airlines
Sun 9/218:20 pmSAT - BWI
1 stop20h 22mMultiple Airlines
Deal found 8/18$168
This FlightHub deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/218:14 pmBWI - SAT
1 stop21h 16mMultiple Airlines
Sat 9/278:37 pmSAT - BWI
1 stop9h 24mMultiple Airlines
Deal found 8/18$170
This Priceline deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/48:16 amBWI - SAT
1 stop13h 36mMultiple Airlines
Sun 9/79:55 amSAT - BWI
1 stop6h 47mMultiple Airlines
Deal found 8/16$173
This FlightHub deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/266:10 amIAD - SAT
1 stop11h 20mFrontier
Mon 9/295:40 pmSAT - IAD
1 stop5h 35mFrontier
Deal found 8/17$226
This FlightHub deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/67:00 amDCA - SAT
1 stop13h 30mFrontier
Sun 11/98:25 pmSAT - DCA
1 stop14h 39mFrontier
Deal found 8/17$227

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to San Antonio that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 19, 2025.
Use the filters below to find and compare flights from Washington, D.C. to San Antonio that are best for you.

Fly from

Washington, D.C.

Fly to

San Antonio

Route

Depart

Return

Price

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Sat 9/13

5:45 am-7:32 pm

1 stop14h 47m

San Antonio

Sat 9/20

8:37 pm-7:01 am

1 stop9h 24m

$143

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Sat 9/13

5:45 am-7:32 pm

1 stop14h 47m

San Antonio

Mon 9/15

5:40 pm-12:17 am

1 stop5h 37m

$152

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Sat 9/20

5:45 am-7:32 pm

1 stop14h 47m

San Antonio

Sun 9/21

8:20 pm-5:42 pm

1 stop20h 22m

$153

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Fri 9/5

8:16 am-4:47 pm

1 stop9h 31m

San Antonio

Sat 9/13

8:37 pm-7:01 am

1 stop9h 24m

$157

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Thu 9/18

8:14 pm-4:30 pm

1 stop21h 16m

San Antonio

Sat 9/20

8:37 pm-7:01 am

1 stop9h 24m

$157

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Fri 9/5

8:16 am-4:47 pm

1 stop9h 31m

San Antonio

Fri 9/12

5:40 pm-12:17 am

1 stop5h 37m

$159

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Fri 9/5

6:22 am-4:30 pm

1 stop11h 08m

San Antonio

Thu 9/11

11:33 am-12:17 am

1 stop11h 44m

$163

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Mon 9/8

6:22 am-4:30 pm

1 stop11h 08m

San Antonio

Thu 9/11

11:33 am-7:10 pm

1 stop6h 37m

$163

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Fri 9/5

6:22 am-4:30 pm

1 stop11h 08m

San Antonio

Mon 9/8

5:40 pm-12:17 am

1 stop5h 37m

$163

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Fri 9/5

6:22 am-4:30 pm

1 stop11h 08m

San Antonio

Fri 9/12

5:40 pm-12:17 am

1 stop5h 37m

$163

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 53 results
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The best insider tips for Washington, D.C. to San Antonio flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. to San Antonio trip
Airports
IAD

Security queues at IAD can be long. Pay attention to signage for the correct train to your concourse to save time.

Read more about IADby Ramsey Qubein
SAT

For quick downtown access from SAT, rideshare services are convenient and pick up on Terminal A's lower level.

Read more about SATby Ramsey Qubein
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on SAT and IAD

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Best time to book a flight from Washington, D.C. to San Antonio

Have a flexible travel schedule? Discover the best time to fly to San Antonio from Washington, D.C. with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to San Antonio

How far ahead should I book a flight from Washington, D.C. to San Antonio?

Use this chart to determine the optimal time to book a round-trip flight from Washington, D.C. to San Antonio. Price data was last updated on August 8, 2025.

The price you pay for your flight from Washington, D.C. to San Antonio may vary depending on when you book. For the best chance of a lower fare, look to book 51 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Washington, D.C. to San Antonio?

Currently, August is the cheapest month in which you can book a flight from Washington, D.C. to San Antonio (average of $295). Flying from Washington, D.C. to San Antonio in March is currently the most expensive (average of $376). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from WAS to SAT?

Find hourly flight availability from Washington, D.C. to San Antonio. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 19, 2025.

It’s typically best to fly out from Washington, D.C. to San Antonio in the evening. Doing so could potentially save you 27% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from Washington, D.C. to San Antonio?

Use this chart to determine the cheapest time to fly round-trip from Washington, D.C. to San Antonio. Price data was last updated on August 17, 2025.

Travelers seeking maximum savings on their Washington, D.C. to San Antonio flight should consider departing on Wednesday evenings when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Washington, D.C. to San Antonio

Explore weekly flight availability from Washington, D.C. to San Antonio. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 19, 2025.

The most flights from WAS to SAT are scheduled on a Monday (8 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (1 on average).

How much does it cost to fly round-trip from Washington, D.C. to San Antonio?

What’s the top layover airport for flights from Washington, D.C. to San Antonio?

Share of 1-stop round-trip flights from Washington, D.C. to San Antonio chosen by Cheapflights users in the past 12 months, using the same layover each way.

Phoenix (PHX) – chosen by Cheapflights users on 40% of 1-stop itineraries from Washington, D.C. to San Antonio on Cheapflights.

What’s the cheapest layover airport for flights from Washington, D.C. to San Antonio?

Average round-trip fare for 1-stop flights from Washington, D.C. to San Antonio, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $205.

What’s the fastest layover option from Washington, D.C. to San Antonio?

Shortest average travel time for 1-stop one-way flights from Washington, D.C. to San Antonio, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Houston (IAH) have the shortest average one-way travel time for 1-stop routes: 6h 05m.

Which airport typically offers the quickest layover for flights from Washington, D.C. to San Antonio?

Average layover duration for 1-stop one-way flights from Washington, D.C. to San Antonio, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Phoenix (PHX) offer the fastest connection on this route, with an average layover time of 1h 28m.

Reviews of airlines servicing San Antonio

Get insights into the airlines that provide service to San Antonio. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Antonio. Reviews last updated August 19, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Washington, D.C. to San Antonio. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,981 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,922 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Spirit Airlines
6.3
Okay
8,037 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to San Antonio. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to San Antonio from Washington, D.C.?

    If you book a flight to San Antonio from Washington, D.C., you will be flying to San Antonio, which is the city’s only airport. San Antonio (SAT) is located 7.6 mi from the center of San Antonio. There are 4 flights from Washington, D.C. to San Antonio per day from 6 different airlines.

  • How long is the flight from Washington, D.C. to San Antonio?

    Departing from Washington, D.C. to San Antonio will take you 5h 35m. There are 1360 mi between Washington, D.C. and San Antonio. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Washington, D.C. to San Antonio round-trip?

    According to our current data, Frontier ($128), Southwest ($181), and American Airlines ($218) offers the cheapest pricing from Washington, D.C. to San Antonio. You may be able to fly from Washington, D.C. to San Antonio for 66% less than the average price by searching for these airlines.

  • What are the most popular routes from Washington, D.C. to San Antonio?

    The most popular flight routes from Washington, D.C. to San Antonio are Washington, D.C. Dulles Intl - San Antonio, Baltimore/Washington - San Antonio and Washington, D.C. Reagan-National - San Antonio.

  • What are the most reliable airlines from Washington, D.C. to San Antonio?

    The top 3 most reliable airlines when flying from Washington, D.C. to San Antonio are Mesa Airlines (100%), United Airlines (88%) and Air Canada (77%).

  • What are the cheapest flights from Washington, D.C. to San Antonio?

    Looking at all options, your cheapest flight can be booked for $155. While the most popular route (Washington, D.C. Dulles Intl - San Antonio) can be booked for $150 on average our data indicates $526 when flying from Washington, D.C. to San Antonio.

  • Can I find deals for flights from Washington, D.C. to San Antonio that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to San Antonio flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to San Antonio?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to San Antonio.

  • Can I find deals for business class flights from Washington, D.C. to San Antonio?

    Yes. Cheapflights offers flight deals from Washington, D.C. to San Antonio by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. to San Antonio?

    Currently, August is the cheapest month in which you can book a flight from Washington, D.C. to San Antonio (average of $295). Flying from Washington, D.C. to San Antonio in March is currently the most expensive (average of $376). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
New Braunfels
Kerrville

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Alternative routes for Washington, D.C. to San Antonio

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Dallas/Fort Worth flights
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Top 6 airlines flying from Washington, D.C. to San Antonio

Discover the top 6 airlines that operate flights from Washington, D.C. to San Antonio. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$86Average$218FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$117Average$230FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$158Average$356FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$181Average$386FlexibilityNo cancel feeOn-time63%
DeltaCheapest$238Average$359FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$240Average$413FlexibilityNo cancel feeOn-time69%

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