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Dulles Intl

$70+ Cheap flights from San Antonio (SAT) to Dulles Intl (IAD)

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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — IAD
Feb 11 — Feb 181
Wed 2/11
Wed 2/18
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from San Antonio to Washington, D.C. Dulles Intl are usually found in February or April, booked 87 days in advance, depart on a Thursday or Friday and return on a Wednesday

Cheap flight deals from San Antonio to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from San Antonio (SAT) to Dulles Intl (IAD). 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 12, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$256
(Kiwi.com)

One-way from

$70
(Mytrip)

Popular in

March

Cheapest in

February

Average price

$383

Good round-trip deal

$346 or less

Good one-way deal

$261 or less
Provider with most accurate pricing for San Antonio-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for San Antonio-Washington, D.C. Dulles Intl flights.
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From San Antonio to Washington, D.C. Dulles Intl
Search Deals
One-way flight from San Antonio to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($1 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from San Antonio to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from San Antonio to Washington, D.C. Dulles Intl.
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Find flight deals from San Antonio to Dulles Intl

Cheapest flights from San Antonio to Dulles Intl
Explore the most affordable flight options available from San Antonio to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 12, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/12. 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 1/298:24 pm
SAT
-
IAD
2 stops37h 20m
Multiple Airlines
Mon 2/21:31 pm
IAD
-
SAT
1 stop11h 21m
Multiple Airlines
Deal found 1/12$256
This United Airlines deal was found by Cheapflights users on 1/12. 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 2/67:25 am
SAT
-
IAD
Nonstop3h 09m
United Airlines
Mon 2/92:24 pm
IAD
-
SAT
1 stop7h 20m
United Airlines
Deal found 1/12$259
This United Airlines deal was found by Cheapflights users on 1/11. 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.
Thu 4/912:09 pm
SAT
-
IAD
Nonstop3h 21m
United Airlines
Sun 4/128:15 am
IAD
-
SAT
Nonstop3h 48m
United Airlines
Deal found 1/11$266
This Kiwi.com deal was found by Cheapflights users on 1/11. 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.
Thu 4/91:51 pm
SAT
-
IAD
2 stops20h 47m
Multiple Airlines
Sun 4/129:58 pm
IAD
-
SAT
1 stop15h 51m
Multiple Airlines
Deal found 1/11$267
This Delta deal was found by Cheapflights users on 1/11. 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 4/16:32 am
SAT
-
IAD
1 stop6h 00m
Delta
Tue 6/27:50 pm
IAD
-
SAT
1 stop5h 24m
Delta
Deal found 1/11$269
This Frontier deal was found by Cheapflights users on 1/12. 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.
Sun 3/18:24 pm
SAT
-
IAD
1 stop9h 56m
Frontier
Sat 3/78:09 am
IAD
-
SAT
1 stop12h 59m
Frontier
Deal found 1/12$275
This Kiwi.com deal was found by Cheapflights users on 1/12. 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 3/181:22 pm
SAT
-
IAD
1 stop16h 58m
Multiple Airlines
Fri 3/208:09 am
IAD
-
SAT
2 stops26h 23m
Multiple Airlines
Deal found 1/12$276
This United Airlines deal was found by Cheapflights users on 1/12. 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 1/2912:15 pm
SAT
-
IAD
Nonstop3h 09m
United Airlines
Mon 2/25:50 pm
IAD
-
SAT
Nonstop4h 06m
United Airlines
Deal found 1/12$279
This Kiwi.com deal was found by Cheapflights users on 1/10. 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.
Thu 3/192:08 pm
SAT
-
IAD
1 stop16h 16m
Frontier
Mon 3/236:20 am
IAD
-
SAT
2 stops18h 57m
Frontier
Deal found 1/10$280
This Kiwi.com deal was found by Cheapflights users on 1/10. 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.
Sat 2/147:56 pm
SAT
-
IAD
2 stops13h 19m
Multiple Airlines
Mon 2/168:15 am
IAD
-
SAT
1 stop16h 44m
Multiple Airlines
Deal found 1/10$283
This Kiwi.com deal was found by Cheapflights users on 1/12. 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 2/126:00 am
SAT
-
IAD
1 stop24h 20m
Multiple Airlines
Sun 2/159:17 pm
IAD
-
SAT
2 stops37h 13m
Multiple Airlines
Deal found 1/12$285
This Kiwi.com deal was found by Cheapflights users on 1/11. 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.
Thu 2/512:31 pm
SAT
-
IAD
2 stops20h 24m
Frontier
Sun 2/85:37 pm
IAD
-
SAT
1 stop24h 26m
Frontier
Deal found 1/11$287

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Antonio to Dulles Intl 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 12, 2026.
Use the filters below to find and compare flights from San Antonio to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

San Antonio

Fly to

Dulles Intl

Route

Depart

Return

Price

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Wed 2/18

2:10 pm-8:41 pm

1 stop5h 31m

Washington, D.C. Dulles Intl

Wed 2/25

8:15 am-11:11 am

Nonstop3h 56m

$259

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Wed 3/4

6:30 am-4:28 pm

1 stop8h 58m

Washington, D.C. Dulles Intl

Sun 3/8

8:15 am-11:11 am

Nonstop3h 56m

$259

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Fri 4/24

6:02 pm-11:59 pm

1 stop4h 57m

Washington, D.C. Dulles Intl

Mon 4/27

8:15 am-11:03 am

Nonstop3h 48m

$259

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Wed 4/1

6:32 am-1:32 pm

1 stop6h 00m

Washington, D.C. Dulles Intl

Fri 4/17

5:26 pm-10:27 pm

1 stop6h 01m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Sat 2/7

4:00 pm-11:06 pm

1 stop6h 06m

Washington, D.C. Dulles Intl

Mon 2/16

7:35 pm-12:35 am

1 stop6h 00m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Thu 2/26

6:27 pm-12:21 am

1 stop4h 54m

Washington, D.C. Dulles Intl

Wed 3/4

7:35 pm-12:35 am

1 stop6h 00m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Wed 3/18

5:50 pm-11:51 pm

1 stop5h 01m

Washington, D.C. Dulles Intl

Tue 3/24

2:12 pm-8:54 pm

1 stop7h 42m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Tue 3/3

5:25 am-11:53 am

1 stop5h 28m

Washington, D.C. Dulles Intl

Tue 3/17

6:00 am-11:25 am

1 stop6h 25m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Sun 2/8

2:10 pm-8:49 pm

1 stop5h 39m

Washington, D.C. Dulles Intl

Sun 2/15

8:15 am-1:08 pm

1 stop5h 53m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Fri 5/8

6:49 am-2:03 pm

1 stop6h 14m

Washington, D.C. Dulles Intl

Mon 5/11

6:20 am-12:24 pm

1 stop7h 04m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/10

Showing 1-10 of 23 results
1
2
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Compare providers for flights from San Antonio to Dulles Intl

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 San Antonio to Dulles Intl in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust 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 San Antonio-Washington, D.C. Dulles Intl Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on San Antonio-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from San Antonio-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Antonio-Washington, D.C. Dulles Intl Airport 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 San Antonio-Washington, D.C. Dulles Intl Airport 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 San Antonio to Dulles Intl

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

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

Use this chart to determine the optimal time to book a round-trip flight from San Antonio to Dulles Intl. Price data was last updated on January 9, 2026.

The best time to book flights from San Antonio to Washington, D.C. Dulles Intl Airport is 87 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 San Antonio to Washington, D.C. Dulles Intl Airport?

Currently, June is the cheapest month in which you can book a flight from San Antonio to Washington, D.C. Dulles Intl Airport (average of $111). Flying from San Antonio to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of $329). 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 SAT to IAD?

Find hourly flight availability from San Antonio to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 12, 2026.

When flying from San Antonio to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

For longer trips, economy lots with shuttle service offer better value than the new parking garage at SAT.

Read more about SATBy Ramsey Qubein
IAD

The Washington Metro Silver line reaches IAD in under 40 minutes, offering a cheap way to get to the airport.

Read more about IADBy 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

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated January 12, 2026.
Read through reviews of airlines operating flights from San Antonio to Washington, D.C. Dulles Intl Airport, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,256 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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
Southwest
8.0
Very good
4,256 reviews
Southwest
8.0
Very good
4,256 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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
Delta
7.9
Good
8,039 reviews
Southwest
8.0
Very good
4,256 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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
United Airlines
7.4
Good
9,149 reviews
Southwest
8.0
Very good
4,256 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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
American Airlines
7.2
Good
11,114 reviews
Southwest
8.0
Very good
4,256 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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 San Antonio to Dulles Intl. 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 from for flights from San Antonio to Washington, D.C. Dulles Intl?

    For a flight from San Antonio to Washington, D.C. Dulles Intl, you will be flying from San Antonio. San Antonio (SAT) is just 7.6 mi from the center of the city. San Antonio is the only San Antonio airport and it handles 4 outbound flights to Washington, D.C. Dulles Intl per day. 4 airlines have flights to Washington, D.C. Dulles Intl from San Antonio on a regular basis.

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

    For as low as $259, United Airlines can have you in Washington, D.C. Dulles Intl Airport from San Antonio in 5h 31m. Airlines will cover a distance of 1360 mi. This flight may include one or multiple stops.

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

    Currently priced at $185, American Airlines will fly you from San Antonio to Washington, D.C. Dulles Intl Airport and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Southwest and United Airlines - these airlines can fly you to your destination from $204 and $237, respectively. Users have found that American Airlines is 48% cheaper than the other options available to this destination.

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

    One-way options have recently been found by users for as low as $80 on Southwest. Other airlines that offer cheap prices include United Airlines from $108 and Delta from $124 one-way.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from San Antonio to Washington, D.C. Dulles Intl Airport on time: Mesa Airlines (100%), United Airlines (98%), Air Canada (94%).

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

    While on average a flight from San Antonio to Washington, D.C. Dulles Intl Airport is generally $517, our data shows the cheapest flight currently is $114. When looking at the most popular route, (San Antonio - Washington, D.C. Dulles Intl), you can expect to pay $235 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Antonio to Dulles Intl 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 San Antonio to Washington, D.C. Dulles Intl Airport?

    Currently, June is the cheapest month in which you can book a flight from San Antonio to Washington, D.C. Dulles Intl Airport (average of $111). Flying from San Antonio to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of $329). 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 Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Silver Spring
Hanover
Fredericksburg
Linthicum Heights
Rockville
Laurel
Towson
Manassas
National Harbor
Largo
Bowie
McLean
Clinton
Herndon

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Antonio to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from San Antonio to Dulles Intl

Discover the top 4 airlines that operate flights from San Antonio to Dulles Intl. 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 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$185Average$372FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$204Average$278FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$236Average$374FlexibilityNo cancel feeOn-time69%
DeltaCheapest$248Average$346FlexibilityNo cancel feeOn-timeN/A

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