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$98+ 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 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SAT
nov. 29 — dic. 61
sáb. 11/29
sáb. 12/6
1 adult, Economy
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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 Saturday and return on a Friday

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 octubre 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$261
(Frontier)

One-way from

$98
(eDestinos)

Popular in

March

Cheapest in

August

Average price

$394

Good round-trip deal

$319 or less

Good one-way deal

$233 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-San Antonio flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-San Antonio flights.
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From Washington, D.C. Dulles Intl to San Antonio
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One-way flight from Washington, D.C. Dulles Intl 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. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to San Antonio.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to San Antonio.
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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 octubre 30, 2025.

This Frontier deal was found by Cheapflights users on 10/29. 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.
vie. 12/55:45 amIAD - SAT
1 stop12h 06mFrontier
dom. 12/148:50 amSAT - IAD
1 stop10h 34mFrontier
Deal found 10/29$261
This Kiwi.com deal was found by Cheapflights users on 10/28. 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. 12/18:40 amIAD - SAT
1 stop11h 41mMultiple Airlines
mar. 12/27:37 pmSAT - IAD
2 stops17h 52mMultiple Airlines
Deal found 10/28$263
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
mié. 11/267:05 amIAD - SAT
1 stop10h 03mMultiple Airlines
mié. 11/268:33 pmSAT - IAD
1 stop12h 44mMultiple Airlines
Deal found 10/28$266
This Delta deal was found by Cheapflights users on 10/28. 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.
sáb. 11/225:59 pmIAD - SAT
1 stop7h 09mDelta
mié. 11/264:35 pmSAT - IAD
1 stop5h 28mDelta
Deal found 10/28$269
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
jue. 11/139:52 pmIAD - SAT
2 stops21h 40mMultiple Airlines
sáb. 11/1510:58 amSAT - IAD
1 stop7h 53mMultiple Airlines
Deal found 10/28$270
This United Airlines deal was found by Cheapflights users on 10/29. 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.
mié. 12/245:25 pmIAD - SAT
Nonstop3h 59mUnited Airlines
mié. 12/317:05 amSAT - IAD
Nonstop3h 09mUnited Airlines
Deal found 10/29$271
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
dom. 11/238:44 amIAD - SAT
1 stop11h 00mMultiple Airlines
dom. 11/308:33 pmSAT - IAD
2 stops40h 56mMultiple Airlines
Deal found 10/28$272
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
dom. 11/238:44 amIAD - SAT
1 stop11h 00mFrontier
lun. 12/15:07 pmSAT - IAD
1 stop5h 52mFrontier
Deal found 10/28$276
This United Airlines deal was found by Cheapflights users on 10/29. 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.
sáb. 11/158:15 amIAD - SAT
Nonstop3h 51mUnited Airlines
mié. 11/197:07 amSAT - IAD
Nonstop3h 12mUnited Airlines
Deal found 10/29$279
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
vie. 11/75:34 pmIAD - SAT
2 stops17h 29mMultiple Airlines
lun. 11/105:35 pmSAT - IAD
1 stop5h 36mMultiple Airlines
Deal found 10/27$281
This Frontier deal was found by Cheapflights users on 10/28. 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.
lun. 11/246:55 amIAD - SAT
1 stop10h 13mFrontier
lun. 12/15:07 pmSAT - IAD
1 stop5h 52mFrontier
Deal found 10/28$282
This United Airlines deal was found by Cheapflights users on 10/30. 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.
lun. 12/1512:45 pmIAD - SAT
1 stop8h 12mUnited Airlines
jue. 12/187:05 amSAT - IAD
Nonstop3h 09mUnited Airlines
Deal found 10/30$283

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 octubre 30, 2025.
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

jue. 1/15

6:00 am-11:28 am

1 stop6h 28m

San Antonio

mar. 1/20

4:29 pm-12:24 am

1 stop6h 55m

$269

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

jue. 2/12

6:03 am-1:08 pm

1 stop8h 05m

San Antonio

sáb. 2/14

9:10 am-4:30 pm

1 stop6h 20m

$269

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

sáb. 12/13

12:30 pm-6:26 pm

1 stop6h 56m

San Antonio

mié. 12/17

5:00 pm-12:12 am

1 stop6h 12m

$269

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

jue. 1/1

6:00 am-11:08 am

1 stop6h 08m

San Antonio

mar. 1/6

5:30 am-11:47 am

1 stop5h 17m

$269

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

jue. 12/11

6:00 am-10:31 am

1 stop5h 31m

San Antonio

dom. 12/14

5:10 am-11:35 am

1 stop5h 25m

$269

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

mié. 3/25

7:50 pm-12:14 am

1 stop5h 24m

San Antonio

jue. 4/2

5:30 am-12:00 pm

1 stop5h 30m

$269

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

lun. 11/24

5:59 pm-12:38 am

1 stop7h 39m

San Antonio

jue. 11/27

6:30 am-2:39 pm

1 stop7h 09m

$269

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

sáb. 11/22

3:35 pm-9:02 pm

1 stop6h 27m

San Antonio

jue. 11/27

12:10 pm-7:08 pm

1 stop5h 58m

$269

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

mié. 1/14

6:00 am-11:28 am

1 stop6h 28m

San Antonio

mar. 1/20

6:19 pm-12:24 am

1 stop5h 05m

$269

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

vie. 11/7

6:00 am-4:40 pm

1 stop11h 40m

$103

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

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 October.
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 October 24, 2025.

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 $249). 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 octubre 30, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 27% on flights from Washington, D.C. Dulles Intl Airport to San Antonio by exploring options for tickets at noon.

The best insider tips for Washington, D.C. Dulles Intl Airport 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. 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.

Read more about IADby Ramsey Qubein
SAT

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

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

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 octubre 30, 2025.
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.
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

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
Southwest
8.0
Very good
4,243 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

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
Delta
7.9
Good
7,998 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

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
United Airlines
7.4
Good
8,998 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

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
American Airlines
7.2
Good
11,035 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

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 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. 4 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 2 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 6h 28m. Delta provides one of the quickest options available for as low as $269. Airlines will cover a distance of 1360 mi.

  • 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 54% 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 $103 on Frontier. Other airlines that offer cheap prices include Southwest from $114 and Delta from $135 one-way.

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

    Consider Mesa Airlines (100%), United Airlines (96%) or Air Canada (95%) 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 $148. While the most popular route (Washington, D.C. Dulles Intl - San Antonio) can be booked for $147 on average, our data indicates $726 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 $249). 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.
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Top 4 airlines flying from Dulles Intl to San Antonio

Discover the top 4 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 octubre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$181Average$288FlexibilityNo cancel feeOn-time63%
DeltaCheapest$242Average$315FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$249Average$402FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$268Average$332FlexibilityNo cancel feeOn-time71%

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