Security queues at IAD can be long. Pay attention to signage for the correct train to your concourse to save time.
$63+ 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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SAT
Jan 11 — Jan 181
1 adult, Economy
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Find cheap flights from Washington, D.C. to San Antonio with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Washington, D.C. to San Antonio are usually found in August or October, booked 80 days in advance, depart on a Wednesday or Tuesday and return on a Thursday
Cheap flight deals from Washington, D.C. to San Antonio
Cheapest flights from Washington, D.C. to San AntonioExplore 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 December 12, 2025.
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 December 12, 2025.
This Expedia deal was found by Cheapflights users on 12/11. 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.
Wed 12/315:30 amBWI - SAT
1 stop12h 31mMultiple Airlines
Wed 1/712:45 pmSAT - BWI
1 stop10h 04mMultiple Airlines
Deal found 12/11![Multiple Airlines logo]()
$177
This CheapOair deal was found by Cheapflights users on 12/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:40 amBWI - SAT
2 stops13h 46mSpirit Airlines
Wed 1/712:45 pmSAT - BWI
1 stop10h 04mSpirit Airlines
Deal found 12/10![Spirit Airlines logo]()
$233
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:22 amIAD - SAT
Nonstop4h 01mUnited Airlines
Wed 12/317:05 amSAT - IAD
Nonstop3h 09mUnited Airlines
Deal found 12/10![United Airlines logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 12/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/309:09 pmBWI - SAT
1 stop22h 07mMultiple Airlines
Tue 1/206:30 amSAT - BWI
1 stop16h 17mMultiple Airlines
Deal found 12/11![Multiple Airlines logo]()
$267
This Delta deal was found by Cheapflights users on 12/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amIAD - SAT
1 stop6h 08mDelta
Thu 1/15:10 amSAT - IAD
1 stop6h 03mDelta
Deal found 12/10![Delta logo]()
$269
This United Airlines deal was found by Cheapflights users on 12/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:15 amDCA - SAT
1 stop8h 38mUnited Airlines
Wed 1/75:25 amSAT - DCA
1 stop5h 05mUnited Airlines
Deal found 12/11![United Airlines logo]()
$278
This American Airlines deal was found by Cheapflights users on 12/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:07 pmDCA - SAT
1 stop7h 03mAmerican Airlines
Wed 1/76:41 amSAT - DCA
Nonstop3h 02mAmerican Airlines
Deal found 12/11![American Airlines logo]()
$289
This Frontier deal was found by Cheapflights users on 12/10. 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.
Wed 12/245:30 amBWI - SAT
1 stop12h 31mFrontier
Fri 12/265:56 pmSAT - BWI
1 stop5h 33mFrontier
Deal found 12/10![Frontier logo]()
$298
This Delta deal was found by Cheapflights users on 12/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:00 pmDCA - SAT
1 stop7h 53mDelta
Thu 1/15:20 amSAT - DCA
1 stop5h 17mDelta
Deal found 12/11![Delta logo]()
$308
This Expedia deal was found by Cheapflights users on 12/10. 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.
Mon 12/225:30 amBWI - SAT
1 stop12h 31mFrontier
Wed 12/247:11 pmSAT - BWI
1 stop11h 11mFrontier
Deal found 12/10![Frontier logo]()
$312
This Gotogate deal was found by Cheapflights users on 12/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/138:37 amBWI - SAT
1 stop24h 18mFrontier
Sun 12/145:46 pmSAT - BWI
1 stop5h 38mFrontier
Deal found 12/10![Frontier logo]()
$318
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:45 amBWI - SAT
1 stop15h 41mMultiple Airlines
Sun 1/412:45 pmSAT - BWI
2 stops44h 53mMultiple Airlines
Deal found 12/10![Multiple Airlines logo]()
$321
Find 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 December 12, 2025.
Most accurate provider | Mytrip 3 stars |
|---|---|
Most trusted provider | Mytrip 3 stars |
Round-trip from | $128 (Frontier) |
One-way from | $63 (Super.com) |
Popular in | December |
Cheapest in | August |
Average price | $469 |
Good round-trip deal | $249 or less |
Good one-way deal | $148 or less |
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 December 12, 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
Wed 1/21
11:30 am-11:52 pm
1 stop13h 22m
San Antonio
Fri 1/23
6:13 pm-12:36 am
1 stop5h 23m
$146
BaltimoreSan Antonio
BWI - SAT
BWISAT
Baltimore/Washington
Mon 1/5
11:55 am-5:01 pm
1 stop6h 06m
San Antonio
Thu 1/8
10:35 am-7:03 pm
1 stop7h 28m
$230
BaltimoreSan Antonio
BWI - SAT
BWISAT
Baltimore/Washington
Mon 1/5
9:34 am-5:37 am
2 stops21h 03m
San Antonio
Thu 1/8
6:30 am-11:47 pm
1 stop16h 17m
$239
BaltimoreSan Antonio
BWI - SAT
BWISAT
Baltimore/Washington
Fri 1/30
9:26 am-11:52 pm
2 stops15h 26m
San Antonio
Wed 2/4
6:30 am-11:36 pm
2 stops16h 06m
$240
Washington, D.C.San Antonio
IAD - SAT
IADSAT
Washington, D.C. Dulles Intl
Fri 1/9
8:15 am-3:31 pm
1 stop8h 16m
San Antonio
Thu 1/15
12:15 pm-4:24 pm
Nonstop3h 09m
$259
Washington, D.C.San Antonio
IAD - SAT
IADSAT
Washington, D.C. Dulles Intl
Sat 1/10
12:35 pm-7:41 pm
1 stop8h 06m
San Antonio
Sun 1/11
7:25 am-11:34 am
Nonstop3h 09m
$259
Washington, D.C.San Antonio
DCA - SAT
DCASAT
Washington, D.C. Reagan-National
Sun 1/4
6:00 am-11:07 am
1 stop6h 07m
San Antonio
Fri 1/16
4:00 pm-10:57 pm
1 stop5h 57m
$269
Washington, D.C.San Antonio
DCA - SAT
DCASAT
Washington, D.C. Reagan-National
Mon 4/6
6:10 am-11:15 am
1 stop6h 05m
San Antonio
Thu 4/9
7:20 am-4:20 pm
1 stop8h 00m
$269
Washington, D.C.San Antonio
DCA - SAT
DCASAT
Washington, D.C. Reagan-National
Sat 1/24
8:00 am-3:21 pm
1 stop8h 21m
San Antonio
Mon 1/26
5:20 am-12:40 pm
1 stop6h 20m
$269
Washington, D.C.San Antonio
DCA - SAT
DCASAT
Washington, D.C. Reagan-National
Thu 4/9
6:30 am-12:17 pm
1 stop6h 47m
San Antonio
Wed 4/15
2:20 pm-10:14 pm
1 stop6h 54m
$269
Showing 1-10 of 60 results
Compare providers for flights from Washington, D.C. to San Antonio
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Washington, D.C. to San Antonio in December.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Washington, D.C.-San Antonio flights, users find the pricing of Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on Washington, D.C.-San Antonio flight deals on Cheapflights vs. Mytrip >95% of the time. Price accuracy is based on data collected from Washington, D.C.-San Antonio flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Washington, D.C.-San Antonio flights, Cheapflights users trust Mytrip the most. Mytrip has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C.-San Antonio flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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 December 5, 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 80 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, July is the cheapest month in which you can book a flight from Washington, D.C. to San Antonio (average of $94). Flying from Washington, D.C. to San Antonio in January is currently the most expensive (average of $185). 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 December 12, 2025.
It’s typically best to fly out from Washington, D.C. to San Antonio in the afternoon. Doing so could potentially save you 24% on the flight price compared to flying at noon, 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 December 6, 2025.
Travelers seeking maximum savings on their Washington, D.C. to San Antonio flight should consider departing on Friday at noon when fares are most often at their lowest. Monday at noon 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 December 12, 2025.
The most flights from WAS to SAT are scheduled on a Monday (8 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 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 50% 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.
Phoenix (PHX) is the most affordable 1-stop option, with an average round-trip price of $288.
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 Dallas (DAL) have the shortest average one-way travel time for 1-stop routes: 5h 40m.
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.
The best insider tips for Washington, D.C. to San Antonio flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. to San Antonio trip
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 December 12, 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.
Entertainment
7.5
Crew
8.6
Boarding
8.1
Overall
7.9
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Crew
8.6
Boarding
8.1
Overall
7.9
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Crew
8.6
Boarding
8.1
Overall
7.9
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Crew
8.6
Boarding
8.1
Overall
7.9
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Crew
8.6
Boarding
8.1
Overall
7.9
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Crew
8.6
Boarding
8.1
Overall
7.9
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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.
Traveling to a place near San Antonio?
Book flights to San Antonio if you plan to visit one of these locationsNew Braunfels
Kerrville
Browse thousands of different options on Cheapflights for your next trip
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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.
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 December 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$86 | Average$228 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$114 | Average$225 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$158 | Average$357 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$181 | Average$394 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$236 | Average$329 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$240 | Average$395 | FlexibilityNo cancel fee | On-time69% |