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

For as low as $269, Delta can have you in Washington, D.C. Dulles Intl Airport from San Antonio in 4h 52m. 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 $115 and Delta from $124 one-way.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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 $982, 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 $249 for that flight.

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 most popular airlines that fly from San Antonio to Washington, D.C. Dulles Intl Airport?

The most popular airlines flying from San Antonio to Washington, D.C. Dulles Intl Airport are United Airlines, Delta and American Airlines. Something to consider prior to booking your flight.

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.

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.

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.

$70+ Flights from San Antonio to Washington, D.C. Dulles Intl Airport

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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

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 2, 2026.

Wed 12/317:05 amSAT - IAD

Nonstop3h 09mUnited Airlines

Wed 1/75:50 pmIAD - SAT

Nonstop4h 06mUnited Airlines

Deal found 12/31

$348

Wed 12/3112:25 pmSAT - IAD

Nonstop3h 05mUnited Airlines

Tue 1/65:50 pmIAD - SAT

Nonstop4h 06mUnited Airlines

Deal found 12/31

$357

Wed 12/314:45 pmSAT - IAD

1 stop5h 07mDelta

Wed 1/79:00 amIAD - SAT

1 stop7h 21mDelta

Deal found 12/31

$368

Wed 12/317:05 amSAT - IAD

Nonstop3h 09mUnited Airlines

Mon 1/55:25 pmIAD - SAT

Nonstop3h 59mUnited Airlines

Deal found 12/31

$401

Wed 12/3110:35 amSAT - IAD

1 stop5h 30mAmerican Airlines

Wed 1/711:34 amIAD - SAT

2 stops11h 18mAmerican Airlines

Deal found 12/31

$453

Wed 12/3110:35 amSAT - IAD

1 stop5h 30mAmerican Airlines

Tue 1/61:08 pmIAD - SAT

2 stops10h 29mAmerican Airlines

Deal found 12/31

$462

Wed 12/315:56 pmSAT - IAD

1 stop16h 42mMultiple Airlines

Mon 1/57:06 pmIAD - SAT

2 stops35h 31mMultiple Airlines

Deal found 12/31

$717

Best flights from San Antonio to Dulles Intl
Discover carefully curated flight deals from San Antonio to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 2, 2026.

Sat 2/74:00 pmSAT - IAD

1 stop6h 06mDelta

Thu 2/1210:08 amIAD - SAT

1 stop8h 14mDelta

Deal found 12/31

$269

Wed 6/105:45 amSAT - IAD

1 stop4h 52mUnited Airlines

Wed 6/178:35 amIAD - SAT

1 stop8h 03mUnited Airlines

Deal found 12/30

$269

Thu 2/512:31 pmSAT - IAD

2 stops20h 24mMultiple Airlines

Sun 2/89:18 amIAD - SAT

1 stop15h 34mMultiple Airlines

Deal found 1/1

$299

Mon 3/164:05 pmSAT - IAD

1 stop7h 10mSouthwest

Wed 3/185:50 amIAD - SAT

1 stop9h 20mSouthwest

Deal found 1/1

$299

Sat 2/145:25 amSAT - IAD

1 stop5h 25mDelta

Sat 2/2110:57 amIAD - SAT

1 stop5h 38mDelta

Deal found 12/31

$269

Wed 2/185:25 amSAT - IAD

1 stop5h 28mDelta

Wed 2/257:35 pmIAD - SAT

1 stop6h 00mDelta

Deal found 12/31

$269

Sun 1/255:30 amSAT - IAD

1 stop10h 30mSouthwest

Mon 1/269:05 amIAD - SAT

1 stop8h 55mSouthwest

Deal found 12/31

$303

Mon 6/14:25 pmSAT - IAD

1 stop6h 44mDelta

Mon 6/87:50 pmIAD - SAT

1 stop5h 24mDelta

Deal found 12/31

$269

Tue 1/206:30 amSAT - IAD

1 stop6h 05mDelta

Sun 1/256:00 amIAD - SAT

1 stop6h 26mDelta

Deal found 1/1

$283

Thu 2/266:40 amSAT - IAD

1 stop5h 54mDelta

Wed 3/412:35 pmIAD - SAT

1 stop5h 47mDelta

Deal found 12/30

$289

Fri 5/112:21 pmSAT - IAD

1 stop7h 25mDelta

Sun 5/35:15 pmIAD - SAT

1 stop6h 53mDelta

Deal found 1/1

$303

Last-minute flights from San Antonio to Dulles Intl
Discover last-minute flight deals from San Antonio to Dulles Intl. Data last updated January 2, 2026 and is based on user searches.

Thu 1/87:14 pmSAT - IAD

1 stop11h 41mMultiple Airlines

Fri 1/235:33 pmIAD - SAT

2 stops17h 07mMultiple Airlines

Deal found 12/31

$296

Sun 1/117:14 pmSAT - IAD

1 stop11h 26mMultiple Airlines

Fri 1/235:33 pmIAD - SAT

2 stops17h 07mMultiple Airlines

Deal found 12/31

$308

Thu 1/155:20 amSAT - IAD

1 stop7h 39mDelta

Mon 2/23:42 pmIAD - SAT

1 stop7h 46mDelta

Deal found 1/1

$299

Fri 1/1611:17 amSAT - IAD

2 stops45h 48mMultiple Airlines

Mon 1/198:53 pmIAD - SAT

1 stop27h 59mMultiple Airlines

Deal found 1/1

$284

Fri 1/167:25 amSAT - IAD

Nonstop3h 09mUnited Airlines

Mon 1/198:15 amIAD - SAT

Nonstop4h 04mUnited Airlines

Deal found 1/1

$309

Tue 1/206:30 amSAT - IAD

1 stop6h 05mDelta

Sun 1/256:00 amIAD - SAT

1 stop6h 26mDelta

Deal found 1/1

$283

Fri 1/235:30 amSAT - IAD

1 stop5h 22mDelta

Tue 1/272:15 pmIAD - SAT

1 stop8h 19mDelta

Deal found 12/31

$269

Fri 1/235:00 pmSAT - IAD

1 stop5h 12mAmerican Airlines

Tue 1/271:08 pmIAD - SAT

2 stops9h 44mAmerican Airlines

Deal found 1/1

$323

Sun 1/255:30 amSAT - IAD

1 stop10h 30mSouthwest

Mon 1/269:05 amIAD - SAT

1 stop8h 55mSouthwest

Deal found 12/31

$303

One-way flights from San Antonio to Dulles Intl
Search for one-way flight options from San Antonio to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated January 2, 2026.

Sat 2/282:13 pmSAT - IAD

1 stop18h 12mFrontier

Deal found 1/2

$70

Sun 2/158:14 pmSAT - IAD

1 stop10h 06mFrontier

Deal found 12/31

$82

Thu 2/121:57 pmSAT - IAD

1 stop16h 23mFrontier

Deal found 12/31

$84

Sun 2/228:14 pmSAT - IAD

1 stop10h 55mFrontier

Deal found 1/2

$92

Thu 2/191:57 pmSAT - IAD

1 stop16h 23mFrontier

Deal found 1/2

$98

Thu 2/121:57 pmSAT - IAD

2 stops23h 21mMultiple Airlines

Deal found 12/31

$100

Sun 2/18:24 pmSAT - IAD

2 stops19h 04mFrontier

Deal found 12/30

$109

Sun 2/86:30 amSAT - IAD

1 stop29h 06mMultiple Airlines

Deal found 12/31

$114

Sat 3/78:53 pmSAT - IAD

1 stop8h 31mFrontier

Deal found 12/31

$116

Thu 1/87:14 pmSAT - IAD

1 stop11h 41mFrontier

Deal found 1/1

$118

Find flight deals from San Antonio to Dulles Intl

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$269 (Delta)
One-way from	$70 (Booking.com)
Popular in	March
Cheapest in	February
Average price	$351
Good round-trip deal	$351 or less
Good one-way deal	$220 or less

Provider with most accurate pricing for San Antonio-Washington, D.C. Dulles Intl flight deals.

Search Deals

Provider most trusted by Cheapflights users for San Antonio-Washington, D.C. Dulles Intl flights.

Search Deals

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. 1% potential increase in price ($4 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.

Search Deals

Price to beat on a one-way flight from San Antonio to Washington, D.C. Dulles Intl.

Search Deals

Cheapflights Fare Finder

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

Fly to

Route

Depart

Return

Price

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

Thu 2/12

10:08 am-5:22 pm

1 stop8h 14m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Wed 6/10

5:45 am-11:37 am

1 stop4h 52m

Washington, D.C. Dulles Intl

Wed 6/17

8:35 am-3:38 pm

1 stop8h 03m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Sat 2/14

5:25 am-11:50 am

1 stop5h 25m

Washington, D.C. Dulles Intl

Sat 2/21

10:57 am-3:35 pm

1 stop5h 38m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Wed 2/18

5:25 am-11:53 am

1 stop5h 28m

Washington, D.C. Dulles Intl

Wed 2/25

7:35 pm-12:35 am

1 stop6h 00m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Mon 6/1

4:25 pm-12:09 am

1 stop6h 44m

Washington, D.C. Dulles Intl

Mon 6/8

7:50 pm-12:14 am

1 stop5h 24m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Tue 1/20

6:30 am-1:35 pm

1 stop6h 05m

Washington, D.C. Dulles Intl

Sun 1/25

6:00 am-11:26 am

1 stop6h 26m

$283

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Thu 2/26

6:40 am-1:34 pm

1 stop5h 54m

Washington, D.C. Dulles Intl

Wed 3/4

12:35 pm-5:22 pm

1 stop5h 47m

$289

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Thu 2/5

12:31 pm-9:55 am

2 stops20h 24m

Washington, D.C. Dulles Intl

Sun 2/8

9:18 am-11:52 pm

1 stop15h 34m

$299

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Mon 3/16

4:05 pm-12:15 am

1 stop7h 10m

Washington, D.C. Dulles Intl

Wed 3/18

5:50 am-2:10 pm

1 stop9h 20m

$299

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Sun 1/25

5:30 am-5:00 pm

1 stop10h 30m

Washington, D.C. Dulles Intl

Mon 1/26

9:05 am-5:00 pm

1 stop8h 55m

$303

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/31

Showing 1-10 of 22 results

Compare providers for flights from San Antonio to Dulles Intl

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.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust 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?

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 $279). 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?

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

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.

IAD

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

Our travel experts

Ramsey Qubein

Expert on SAT and IAD

Reviews of airlines servicing Dulles Intl

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

4,254 reviews

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

4,254 reviews

Southwest

8.0

Very good

4,254 reviews

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

8,021 reviews

Southwest

8.0

Very good

4,254 reviews

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

9,132 reviews

Southwest

8.0

Very good

4,254 reviews

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

11,074 reviews

Southwest

8.0

Very good

4,254 reviews

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

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 $269, Delta can have you in Washington, D.C. Dulles Intl Airport from San Antonio in 4h 52m. 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 $115 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 $982, 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 $249 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 $279). 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

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Top 4 airlines flying from San Antonio to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$185	Average$372	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$204	Average$278	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$236	Average$376	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$248	Average$343	FlexibilityNo cancel fee	On-timeN/A

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$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.

Find cheap flights from San Antonio to Dulles Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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

Cheapest flights from San Antonio to Dulles IntlExplore 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 2, 2026.

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 2, 2026.

Find flight deals from San Antonio to Dulles Intl

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

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

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.

Best time to book a flight from San Antonio to Dulles Intl

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Everything you need to know about your flight from San Antonio to Washington, D.C. Dulles Intl Airport

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

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Airports

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IAD

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Reviews of airlines servicing Dulles Intl

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.

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?

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

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

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

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

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

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Top 4 airlines flying from San Antonio to Dulles Intl

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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 2, 2026.