Dulles Intl

$79+ 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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — IAD
nov. 26 — déc. 31
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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 Friday or Thursday 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 octobre 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$249
(United Airlines)

One-way from

$79
(Kiwi.com)

Popular in

March

Cheapest in

February

Average price

$379

Good round-trip deal

$349 or less

Good one-way deal

$248 or less
Provider with most accurate pricing for San Antonio-Washington, D.C. Dulles Intl flight deals.
Provider most trusted by Cheapflights users for San Antonio-Washington, D.C. Dulles Intl flights.
From San Antonio to Washington, D.C. Dulles Intl
One-way flight from San Antonio to Washington, D.C. Dulles Intl
High demand for flights, 0% potential price rise
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Average for round-trip flights in October 2025
Price to beat on a round-trip flight from San Antonio to Washington, D.C. Dulles Intl.
Price to beat on a one-way flight from San Antonio to Washington, D.C. Dulles Intl.

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 octobre 27, 2025.

This United Airlines deal was found by Cheapflights users on 10/26. 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.
dim. 11/167:07 amSAT - IAD
Nonstop3h 12mUnited Airlines
dim. 11/238:15 amIAD - SAT
Nonstop3h 51mUnited Airlines
Deal found 10/26$249
This Mytrip deal was found by Cheapflights users on 10/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 11/207:38 pmSAT - IAD
1 stop11h 12mFrontier
lun. 11/246:55 amIAD - SAT
1 stop10h 13mFrontier
Deal found 10/25$252
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
mar. 12/2312:45 pmSAT - IAD
1 stop7h 18mMultiple Airlines
mar. 12/309:58 pmIAD - SAT
1 stop14h 52mMultiple Airlines
Deal found 10/26$254
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
mer. 11/268:33 pmSAT - IAD
1 stop12h 44mMultiple Airlines
lun. 12/18:40 amIAD - SAT
1 stop11h 41mMultiple Airlines
Deal found 10/26$258
This United Airlines deal was found by Cheapflights users on 10/25. 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.
sam. 12/68:39 amSAT - IAD
1 stop6h 51mUnited Airlines
jeu. 12/115:25 pmIAD - SAT
Nonstop3h 50mUnited Airlines
Deal found 10/25$259
This United Airlines deal was found by Cheapflights users on 10/26. 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.
mer. 12/107:20 amSAT - IAD
Nonstop3h 11mUnited Airlines
mer. 12/175:25 pmIAD - SAT
Nonstop3h 50mUnited Airlines
Deal found 10/26$260
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
dim. 12/2812:45 pmSAT - IAD
1 stop7h 18mMultiple Airlines
mer. 12/316:05 amIAD - SAT
1 stop11h 56mMultiple Airlines
Deal found 10/26$261
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
lun. 12/227:11 pmSAT - IAD
1 stop24h 52mMultiple Airlines
lun. 12/299:58 pmIAD - SAT
1 stop14h 52mMultiple Airlines
Deal found 10/26$262
This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
dim. 11/97:37 pmSAT - IAD
2 stops19h 57mMultiple Airlines
ven. 11/146:00 amIAD - SAT
1 stop11h 40mMultiple Airlines
Deal found 10/25$263
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
lun. 11/105:35 pmSAT - IAD
1 stop5h 36mFrontier
ven. 11/145:34 pmIAD - SAT
2 stops21h 43mFrontier
Deal found 10/26$268
This Delta deal was found by Cheapflights users on 10/26. 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.
jeu. 12/112:40 pmSAT - IAD
1 stop8h 22mDelta
dim. 12/1411:06 amIAD - SAT
1 stop5h 58mDelta
Deal found 10/26$269

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 octobre 27, 2025.
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

mar. 11/25

12:12 pm-4:23 pm

Nonstop3h 11m

Washington, D.C. Dulles Intl

sam. 12/6

5:25 pm-8:15 pm

Nonstop3h 50m

$249

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

sam. 11/15

7:07 am-11:19 am

Nonstop3h 12m

Washington, D.C. Dulles Intl

mar. 11/18

5:15 pm-11:16 pm

1 stop7h 01m

$259

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

mer. 12/10

11:47 am-8:42 pm

1 stop7h 55m

Washington, D.C. Dulles Intl

mer. 12/17

8:20 am-11:11 am

Nonstop3h 51m

$259

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

jeu. 12/4

6:30 am-2:40 pm

1 stop7h 10m

Washington, D.C. Dulles Intl

sam. 12/6

11:06 am-6:32 pm

1 stop8h 26m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

jeu. 12/11

2:40 pm-12:02 am

1 stop8h 22m

Washington, D.C. Dulles Intl

dim. 12/14

11:06 am-4:04 pm

1 stop5h 58m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

sam. 11/22

4:24 pm-10:04 pm

1 stop4h 40m

Washington, D.C. Dulles Intl

sam. 11/29

8:15 am-11:06 am

Nonstop3h 51m

$273

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

mer. 11/19

7:00 am-4:25 pm

1 stop8h 25m

Washington, D.C. Dulles Intl

mer. 11/26

8:15 am-11:06 am

Nonstop3h 51m

$279

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

ven. 11/14

4:57 pm-12:16 am

1 stop6h 19m

Washington, D.C. Dulles Intl

mar. 11/18

7:21 pm-12:38 am

1 stop6h 17m

$289

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

mer. 11/26

8:33 pm-10:17 am

1 stop12h 44m

$89

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

mer. 12/17

3:00 pm-9:29 pm

1 stop5h 29m

$135

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 19 results
1
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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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 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 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 October 24, 2025.

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 March is currently the most expensive (average of $295). 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 octobre 27, 2025.

One of the essential ways to save on airfare from San Antonio to Washington, D.C. Dulles Intl Airport is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at noon could potentially save you up to 70% on airfare.

The best insider tips for San Antonio to Washington, D.C. Dulles Intl Airport 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 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 octobre 27, 2025.
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.

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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 3 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 $249, United Airlines can have you in Washington, D.C. Dulles Intl Airport from San Antonio in 3h 11m. 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 $204, Southwest will fly you from San Antonio to Washington, D.C. Dulles Intl Airport and back. In addition to Southwest, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and United Airlines - these airlines can fly you to your destination from $218 and $238, respectively. Users have found that Southwest is 44% cheaper than the other options available to this destination.

  • 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 (97%), Brussels Airlines (97%).

  • 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 $801, our data shows the cheapest flight currently is $139. When looking at the most popular route, (San Antonio - Washington, D.C. Dulles Intl), you can expect to pay $246 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 March is currently the most expensive (average of $295). 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
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Owings Mills
Linthicum Heights
Manassas
Largo
Oxon Hill
Laurel
Towson
National Harbor
Waldorf
Bowie

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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.

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 octobre 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$204Average$353FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$218Average$378FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$238Average$380FlexibilityNo cancel feeOn-time69%
DeltaCheapest$248Average$322FlexibilityNo cancel feeOn-timeN/A

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