San Antonio

$90+ Cheap flights from Dulles Intl (IAD) 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 1/26. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SAT
Feb 5 — Feb 121
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to San Antonio are usually found in August or September, booked 62 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Cheap flight deals from Dulles Intl to San Antonio

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) 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 January 6, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$249
(United Airlines)

One-way from

$90
(Trip.com)

Popular in

March

Cheapest in

August

Average price

$354

Good round-trip deal

$278 or less

Good one-way deal

$231 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-San Antonio flight deals.
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-San Antonio flights.
From Washington, D.C. Dulles Intl to San Antonio
One-way flight from Washington, D.C. Dulles Intl to San Antonio
Highest demand for flights based on searches. 10% potential increase in price ($45 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Average for round-trip flights in January 2026
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to San Antonio.
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to San Antonio.

Find flight deals from Dulles Intl to San Antonio

Cheapest flights from Dulles Intl to San Antonio
Explore the most affordable flight options available from Dulles Intl to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 6, 2026.

This United Airlines deal was found by Cheapflights users on 1/4. 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 1/298:15 amIAD - SAT
Nonstop4h 04mUnited Airlines
Tue 2/312:15 pmSAT - IAD
Nonstop3h 09mUnited Airlines
Deal found 1/4$249
This Southwest deal was found by Cheapflights users on 1/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/119:05 amIAD - SAT
1 stop8h 55mSouthwest
Sat 2/141:15 pmSAT - IAD
1 stop7h 30mSouthwest
Deal found 1/5$250
This Southwest deal was found by Cheapflights users on 1/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/269:05 amIAD - SAT
1 stop8h 55mSouthwest
Tue 1/276:25 amSAT - IAD
1 stop9h 25mSouthwest
Deal found 1/5$252
This Kiwi.com deal was found by Cheapflights users on 1/5. 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.
Fri 2/272:58 pmIAD - SAT
2 stops23h 20mMultiple Airlines
Thu 3/51:57 pmSAT - IAD
1 stop16h 27mMultiple Airlines
Deal found 1/5$253
This Kiwi.com deal was found by Cheapflights users on 1/4. 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.
Thu 2/2610:10 amIAD - SAT
1 stop14h 49mMultiple Airlines
Sun 3/18:24 pmSAT - IAD
1 stop9h 56mMultiple Airlines
Deal found 1/4$256
This Kiwi.com deal was found by Cheapflights users on 1/3. 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.
Fri 1/232:58 pmIAD - SAT
2 stops9h 54mMultiple Airlines
Thu 1/296:30 amSAT - IAD
1 stop25h 10mMultiple Airlines
Deal found 1/3$257
This Southwest deal was found by Cheapflights users on 1/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/29:05 amIAD - SAT
1 stop13h 50mSouthwest
Wed 2/46:10 amSAT - IAD
1 stop8h 40mSouthwest
Deal found 1/6$258
This United Airlines deal was found by Cheapflights users on 1/6. 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.
Fri 1/308:15 amIAD - SAT
Nonstop4h 04mUnited Airlines
Sun 2/17:00 amSAT - IAD
1 stop8h 00mUnited Airlines
Deal found 1/6$259
This Kiwi.com deal was found by Cheapflights users on 1/3. 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.
Mon 1/261:31 pmIAD - SAT
1 stop11h 21mMultiple Airlines
Sat 1/316:30 amSAT - IAD
1 stop25h 03mMultiple Airlines
Deal found 1/3$262
This Southwest deal was found by Cheapflights users on 1/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/289:05 amIAD - SAT
1 stop8h 55mSouthwest
Sun 2/110:50 amSAT - IAD
1 stop10h 50mSouthwest
Deal found 1/5$263
This United Airlines deal was found by Cheapflights users on 1/3. 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 4/168:15 amIAD - SAT
Nonstop3h 48mUnited Airlines
Mon 4/207:05 amSAT - IAD
Nonstop3h 21mUnited Airlines
Deal found 1/3$265
This Kiwi.com deal was found by Cheapflights users on 1/3. 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.
Sat 1/2411:39 amIAD - SAT
2 stops13h 13mMultiple Airlines
Fri 1/306:13 pmSAT - IAD
1 stop15h 31mMultiple Airlines
Deal found 1/3$266

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl 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 January 6, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to San Antonio that are best for you.

Fly from

Dulles Intl

Fly to

San Antonio

Route

Depart

Return

Price

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Thu 1/29

8:15 am-11:19 am

Nonstop4h 04m

San Antonio

Sun 2/1

7:25 am-11:34 am

Nonstop3h 09m

$249

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Mon 2/16

8:15 am-11:11 am

Nonstop3h 56m

San Antonio

Sat 2/21

2:24 pm-10:16 pm

1 stop6h 52m

$259

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Fri 2/6

8:15 am-11:19 am

Nonstop4h 04m

San Antonio

Tue 2/10

2:15 pm-10:18 pm

1 stop7h 03m

$259

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Fri 2/6

8:15 am-11:19 am

Nonstop4h 04m

San Antonio

Mon 2/9

4:04 pm-10:18 pm

1 stop5h 14m

$259

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Thu 2/19

2:12 pm-8:56 pm

1 stop7h 44m

San Antonio

Mon 2/23

7:05 am-11:19 am

Nonstop3h 14m

$259

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Tue 2/3

5:50 pm-8:56 pm

Nonstop4h 06m

San Antonio

Tue 2/10

7:06 am-4:25 pm

1 stop8h 19m

$259

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Fri 2/27

2:17 pm-9:37 pm

1 stop8h 20m

San Antonio

Wed 3/4

6:27 pm-12:21 am

1 stop4h 54m

$269

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Sat 4/4

5:19 pm-10:42 pm

1 stop6h 23m

San Antonio

Tue 4/7

2:25 pm-11:41 pm

1 stop8h 16m

$269

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Sat 1/31

6:00 am-10:21 am

1 stop5h 21m

San Antonio

Thu 2/5

6:30 am-2:45 pm

1 stop7h 15m

$269

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Thu 1/29

7:30 pm-12:38 am

1 stop6h 08m

San Antonio

Mon 2/2

4:00 pm-11:06 pm

1 stop6h 06m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/5

Showing 1-10 of 21 results
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Compare providers for flights from Dulles Intl 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 Dulles Intl to San Antonio in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy2 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-San Antonio flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C. Dulles Intl Airport-San Antonio flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-San Antonio flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-San Antonio flights, Cheapflights users trust eDreams the most. eDreams 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. Dulles Intl Airport-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 Dulles Intl to San Antonio

Have a flexible travel schedule? Discover the best time to fly to San Antonio from Dulles Intl 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. Dulles Intl Airport to San Antonio

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

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to San Antonio. Price data was last updated on January 2, 2026.

The best time to book flights from Washington, D.C. Dulles Intl Airport to San Antonio is 62 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, July is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Antonio (average of $94). Flying from Washington, D.C. Dulles Intl Airport to San Antonio in February is currently the most expensive (average of $250). 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 IAD to SAT?

Find hourly flight availability from Dulles Intl 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 January 6, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Dulles Intl Airport to San Antonio as you normally would.

The best insider tips for Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport to San Antonio trip
Airports
IAD

Check-in at IAD can be crowded in the afternoon and evening. Arrive early to navigate the busy check-in and security areas smoothly.

SAT

For a quick trip downtown from SAT, use Route 5 bus. It takes about 30 minutes and is a convenient option.

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

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 January 6, 2026.
See what other customers who have flown with Southwest, Delta, and United Airlines from Washington, D.C. Dulles Intl Airport to San Antonio have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl 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. Dulles Intl?

    San Antonio (SAT), located 7.6 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. Dulles Intl to San Antonio. 3 airlines have flights to San Antonio from Washington, D.C. Dulles Intl on a regular basis. Booking flights from Washington, D.C. Dulles Intl to San Antonio should not be difficult; the airport handles an average of 0 inbound flights from Washington, D.C. Dulles Intl per day.

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

    A quick flight from Washington, D.C. Dulles Intl Airport to San Antonio can take about 4h 04m. United Airlines provides one of the quickest options available for as low as $249. Airlines will cover a distance of 1360 mi. All flights are typically nonstop.

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

    Cheapflights users have booked flights from Washington, D.C. Dulles Intl Airport to San Antonio round-trip from $181. Other airlines that can offer you cheap pricing are Delta, from $242, and United Airlines, from $249. You may be able to fly from Washington, D.C. Dulles Intl Airport to San Antonio for 53% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to San Antonio one-way?

    One-way options have recently been found by users for as low as $72 on Frontier. Other airlines that offer cheap prices include Delta from $124 and United Airlines from $124 one-way.

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

    Consider Air Canada (83%), United Airlines (79%) or Brussels Airlines (75%) when booking your flight. These represent the most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to San Antonio.

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

    Looking at all options, your cheapest flight can be booked for $178. While the most popular route (Washington, D.C. Dulles Intl - San Antonio) can be booked for $242 on average, our data indicates $337 when flying from Washington, D.C. Dulles Intl Airport to San Antonio.

  • Can I find deals for flights from Dulles Intl to San Antonio that include hotel bookings?

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

  • How can I find direct flights from Dulles Intl to San Antonio?

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

  • Can I find deals for business class flights from Dulles Intl to San Antonio?

    Yes. Cheapflights offers flight deals from Dulles Intl 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. Dulles Intl Airport to San Antonio?

    Currently, July is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Antonio (average of $94). Flying from Washington, D.C. Dulles Intl Airport to San Antonio in February is currently the most expensive (average of $250). 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 Dulles Intl to San Antonio

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Dulles Intl to San Antonio

Discover the top 3 airlines that operate flights from Dulles Intl 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 January 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$181Average$288FlexibilityNo cancel feeOn-time63%
DeltaCheapest$242Average$311FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$249Average$390FlexibilityNo cancel feeOn-time69%

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