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 19m. 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 $237, respectively. Users have found that Southwest is 46% cheaper than the other options available to this destination.

What is the cheapest day to fly from San Antonio to Washington, D.C. Dulles Intl Airport?

Travelers seeking maximum savings on their San Antonio to Washington, D.C. Dulles Intl Airport flight should consider departing on Saturday at noon when fares are most often at their lowest. Wednesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from San Antonio to Washington, D.C. Dulles Intl Airport

The most flights from SAT to IAD are scheduled on a Monday (8 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (1 on average).

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 $958, our data shows the cheapest flight currently is $148. When looking at the most popular route, (San Antonio - Washington, D.C. Dulles Intl), you can expect to pay $145 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: Air Canada (97%), Lufthansa (97%), Brussels Airlines (93%).

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 American Airlines, Delta and United Airlines. Something to consider prior to booking your flight.

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 6 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.

$72+ Cheap Flights from San Antonio to Washington, D.C. Dulles Intl Airport

Q: How much does it cost to fly round-trip from San Antonio to Washington, D.C. Dulles Intl Airport?

Airfare is below average for this route at the moment. San Antonio to Washington, D.C. Dulles Intl Airport flights typically cost between $297 and $463 in November. The cheapest round-trip price found within the last 3 days was $217 on Multiple Airlines (Nov 10-Nov 20).

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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

Round-trip from	$217 (Kiwi.com)
One-way from	$72 (Cheapflightsfares)
Popular in	March
Cheapest in	February
Average price	$387
Good round-trip deal	$351 or less
Good one-way deal	$253 or less

From San Antonio to Washington, D.C. Dulles Intl

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One-way flight from San Antonio to Washington, D.C. Dulles Intl

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High demand for flights, 2% potential price rise

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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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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 September 17, 2025.

Mon 9/155:40 pmSAT - IAD

1 stop5h 35mFrontier

Mon 10/66:10 amIAD - SAT

1 stop11h 20mFrontier

Deal found 9/15

$204

Mon 11/105:35 pmSAT - IAD

1 stop25h 45mMultiple Airlines

Thu 11/2011:12 amIAD - SAT

1 stop12h 15mMultiple Airlines

Deal found 9/16

$217

Fri 10/248:26 pmSAT - IAD

2 stops17h 51mFrontier

Sun 10/266:15 amIAD - SAT

1 stop11h 37mFrontier

Deal found 9/17

$219

Thu 11/136:00 amSAT - IAD

1 stop12h 51mMultiple Airlines

Mon 11/178:37 pmIAD - SAT

1 stop26h 50mMultiple Airlines

Deal found 9/16

$223

Thu 10/211:33 amSAT - IAD

2 stops20h 44mFrontier

Sun 10/510:09 pmIAD - SAT

2 stops19h 21mFrontier

Deal found 9/14

$224

Fri 9/195:40 pmSAT - IAD

1 stop5h 35mFrontier

Mon 9/226:10 amIAD - SAT

1 stop11h 20mFrontier

Deal found 9/15

$225

Sat 11/86:00 amSAT - IAD

1 stop12h 51mMultiple Airlines

Thu 11/2011:12 amIAD - SAT

1 stop12h 15mMultiple Airlines

Deal found 9/16

$226

Fri 11/145:35 pmSAT - IAD

1 stop5h 36mFrontier

Mon 11/176:00 amIAD - SAT

1 stop11h 40mFrontier

Deal found 9/16

$228

Thu 11/68:25 pmSAT - IAD

2 stops19h 09mFrontier

Mon 11/106:00 amIAD - SAT

1 stop11h 40mFrontier

Deal found 9/15

$235

Fri 10/178:20 pmSAT - IAD

2 stops18h 06mFrontier

Sun 10/196:15 amIAD - SAT

1 stop11h 37mFrontier

Deal found 9/15

$237

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 September 17, 2025.

Fri 10/107:00 amSAT - IAD

Nonstop3h 19mUnited Airlines

Sun 10/128:25 amIAD - SAT

Nonstop3h 33mUnited Airlines

Deal found 9/15

$249

Tue 12/162:43 pmSAT - IAD

1 stop8h 19mDelta

Tue 1/1312:35 pmIAD - SAT

1 stop5h 47mDelta

Deal found 9/15

$257

Tue 11/116:00 amSAT - IAD

1 stop10h 05mSouthwest

Fri 11/145:05 amIAD - SAT

1 stop6h 55mSouthwest

Deal found 9/14

$263

Fri 10/3112:12 pmSAT - IAD

Nonstop3h 12mUnited Airlines

Mon 11/33:59 pmIAD - SAT

1 stop7h 28mUnited Airlines

Deal found 9/14

$259

Thu 11/612:40 pmSAT - IAD

1 stop9h 53mDelta

Tue 11/116:00 amIAD - SAT

1 stop5h 40mDelta

Deal found 9/15

$263

Sun 10/197:00 amSAT - IAD

Nonstop3h 19mUnited Airlines

Sat 11/16:00 amIAD - SAT

1 stop5h 43mUnited Airlines

Deal found 9/17

$259

Thu 12/255:10 amSAT - IAD

1 stop6h 02mDelta

Thu 1/86:10 amIAD - SAT

1 stop6h 23mDelta

Deal found 9/15

$269

Thu 11/137:07 amSAT - IAD

Nonstop3h 12mUnited Airlines

Mon 11/173:59 pmIAD - SAT

1 stop7h 28mUnited Airlines

Deal found 9/14

$259

Fri 11/712:40 pmSAT - IAD

1 stop9h 53mDelta

Mon 11/107:21 pmIAD - SAT

1 stop6h 12mDelta

Deal found 9/17

$269

Wed 10/2211:45 amSAT - IAD

1 stop6h 18mUnited Airlines

Sat 10/255:55 pmIAD - SAT

1 stop5h 40mUnited Airlines

Deal found 9/14

$263

Wed 11/197:05 amSAT - IAD

1 stop7h 50mUnited Airlines

Mon 11/246:00 amIAD - SAT

1 stop5h 43mUnited Airlines

Deal found 9/17

$263

Last-minute flights from San Antonio to Dulles Intl
Discover last-minute flight deals from San Antonio to Dulles Intl. Data last updated September 17, 2025 and is based on user searches.

Fri 9/195:40 pmSAT - IAD

1 stop5h 35mFrontier

Mon 9/226:10 amIAD - SAT

1 stop11h 20mFrontier

Deal found 9/15

$225

Mon 9/225:40 pmSAT - IAD

1 stop5h 35mFrontier

Fri 9/266:10 amIAD - SAT

1 stop11h 20mFrontier

Deal found 9/16

$250

Thu 10/22:54 pmSAT - IAD

1 stop26h 25mMultiple Airlines

Sun 10/57:14 pmIAD - SAT

1 stop21h 36mMultiple Airlines

Deal found 9/17

$223

Thu 10/211:33 amSAT - IAD

2 stops20h 44mFrontier

Sun 10/510:09 pmIAD - SAT

2 stops19h 21mFrontier

Deal found 9/14

$224

Fri 10/107:10 pmSAT - IAD

1 stop24h 43mFrontier

Thu 10/168:02 pmIAD - SAT

1 stop23h 13mFrontier

Deal found 9/16

$241

Thu 10/168:26 pmSAT - IAD

2 stops18h 13mFrontier

Sun 10/196:15 amIAD - SAT

1 stop11h 37mFrontier

Deal found 9/14

$240

Fri 10/178:20 pmSAT - IAD

2 stops18h 06mFrontier

Sun 10/196:15 amIAD - SAT

1 stop11h 37mFrontier

Deal found 9/15

$237

Wed 10/2211:55 amSAT - IAD

Nonstop3h 21mUnited Airlines

Sat 10/255:33 pmIAD - SAT

Nonstop3h 32mUnited Airlines

Deal found 9/16

$249

Fri 10/248:26 pmSAT - IAD

2 stops17h 51mFrontier

Sun 10/266:15 amIAD - SAT

1 stop11h 37mFrontier

Deal found 9/17

$219

Thu 10/308:43 pmSAT - IAD

2 stops17h 11mFrontier

Sun 11/210:54 pmIAD - SAT

2 stops21h 36mFrontier

Deal found 9/15

$242

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 September 17, 2025.

Mon 11/35:35 pmSAT - IAD

1 stop5h 36mFrontier

Deal found 9/15

$72

Fri 10/177:10 pmSAT - IAD

1 stop24h 43mFrontier

Deal found 9/14

$78

Fri 10/107:10 pmSAT - IAD

1 stop24h 43mFrontier

Deal found 9/15

$93

Sat 11/16:05 pmSAT - IAD

1 stop25h 46mFrontier

Deal found 9/15

$112

Mon 9/225:40 pmSAT - IAD

1 stop5h 35mFrontier

Deal found 9/17

$118

Fri 10/35:40 pmSAT - IAD

1 stop28h 16mFrontier

Deal found 9/17

$128

Tue 10/215:56 pmSAT - IAD

1 stop4h 55mUnited Airlines

Deal found 9/16

$129

Thu 10/234:55 pmSAT - IAD

1 stop27h 18mMultiple Airlines

Deal found 9/15

$130

Mon 10/205:45 pmSAT - IAD

1 stop25h 01mFrontier

Deal found 9/15

$132

Wed 1/1410:10 amSAT - IAD

2 stops10h 45mSouthwest

Deal found 9/15

$134

Mon 1/2612:10 pmSAT - IAD

1 stop6h 02mDelta

Deal found 9/15

$135

Thu 10/168:26 pmSAT - IAD

2 stops42h 00mFrontier

Deal found 9/15

$137

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

Fri 10/10

7:00 am-11:19 am

Nonstop3h 19m

Washington, D.C. Dulles Intl

Sun 10/12

8:25 am-10:58 am

Nonstop3h 33m

$249

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Tue 12/16

2:43 pm-12:02 am

1 stop8h 19m

Washington, D.C. Dulles Intl

Tue 1/13

12:35 pm-5:22 pm

1 stop5h 47m

$257

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Fri 10/31

12:12 pm-4:24 pm

Nonstop3h 12m

Washington, D.C. Dulles Intl

Mon 11/3

3:59 pm-10:27 pm

1 stop7h 28m

$259

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Sun 10/19

7:00 am-11:19 am

Nonstop3h 19m

Washington, D.C. Dulles Intl

Sat 11/1

6:00 am-10:43 am

1 stop5h 43m

$259

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Thu 11/13

7:07 am-11:19 am

Nonstop3h 12m

Washington, D.C. Dulles Intl

Mon 11/17

3:59 pm-10:27 pm

1 stop7h 28m

$259

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Tue 11/11

6:00 am-5:05 pm

1 stop10h 05m

Washington, D.C. Dulles Intl

Fri 11/14

5:05 am-11:00 am

1 stop6h 55m

$263

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Thu 11/6

12:40 pm-11:33 pm

1 stop9h 53m

Washington, D.C. Dulles Intl

Tue 11/11

6:00 am-10:40 am

1 stop5h 40m

$263

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Wed 10/22

11:45 am-7:03 pm

1 stop6h 18m

Washington, D.C. Dulles Intl

Sat 10/25

5:55 pm-10:35 pm

1 stop5h 40m

$263

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Wed 11/19

7:05 am-3:55 pm

1 stop7h 50m

Washington, D.C. Dulles Intl

Mon 11/24

6:00 am-10:43 am

1 stop5h 43m

$263

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Thu 12/25

5:10 am-12:12 pm

1 stop6h 02m

Washington, D.C. Dulles Intl

Thu 1/8

6:10 am-11:33 am

1 stop6h 23m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 23 results

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

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

Prices

Airlines

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, August is the cheapest month in which you can book a flight from San Antonio to Washington, D.C. Dulles Intl Airport (average of $292). Flying from San Antonio to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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?

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 71% on airfare.

How much does it cost to fly round-trip from San Antonio to Washington, D.C. Dulles Intl Airport?

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

4,242 reviews

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

4,242 reviews

Southwest

8.0

Very good

4,242 reviews

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

8.0

Very good

7,961 reviews

Southwest

8.0

Very good

4,242 reviews

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

8,926 reviews

Southwest

8.0

Very good

4,242 reviews

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

10,000 reviews

Southwest

8.0

Very good

4,242 reviews

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

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 6 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 19m. 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 $237, respectively. Users have found that Southwest is 46% 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: Air Canada (97%), Lufthansa (97%), Brussels Airlines (93%).
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 $958, our data shows the cheapest flight currently is $148. When looking at the most popular route, (San Antonio - Washington, D.C. Dulles Intl), you can expect to pay $145 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, August is the cheapest month in which you can book a flight from San Antonio to Washington, D.C. Dulles Intl Airport (average of $292). Flying from San Antonio to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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.

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Top 4 airlines flying from San Antonio to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Southwest	Cheapest$204	Average$353	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$218	Average$348	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$237	Average$390	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$248	Average$319	FlexibilityNo cancel fee	On-timeN/A

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$72+ 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 11/3. 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 Friday or Thursday and return on a Wednesday

Cheap flight deals from San Antonio to Dulles Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find 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 September 17, 2025.

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 September 17, 2025.

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.

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

IAD

Our travel experts

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.

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?

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

What is the cheapest time of day to fly from SAT to IAD?

How much does it cost to fly round-trip from San Antonio to Washington, D.C. Dulles Intl Airport?

Weekly flight availability from San Antonio to Washington, D.C. Dulles Intl Airport

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?

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

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

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?

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

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

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

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Alternative routes for San Antonio to Dulles Intl

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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 September 17, 2025.