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

For as low as $265, United Airlines can have you in Washington, D.C. Dulles Intl Airport from San Antonio in 3h 09m. 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 United Airlines and Delta - these airlines can fly you to your destination from $239 and $248, respectively. Users have found that Southwest is 44% 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 $115 on United Airlines. Other airlines that offer cheap prices include Southwest from $125 and Delta from $125 one-way.

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

The most flights from SAT to IAD are scheduled on a Wednesday (8 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 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 $1,044, 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 $237 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: United Airlines (96%), Brussels Airlines (95%), 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 5 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.

$71+ 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 July, 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

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 diciembre 12, 2025.

mié. 12/317:05 amSAT - IAD

Nonstop3h 09mUnited Airlines

mar. 1/65:45 pmIAD - SAT

1 stop6h 12mUnited Airlines

Deal found 12/11

$273

vie. 12/267:05 amSAT - IAD

Nonstop3h 09mUnited Airlines

vie. 1/98:15 amIAD - SAT

Nonstop4h 04mUnited Airlines

Deal found 12/11

$279

vie. 12/262:13 pmSAT - IAD

1 stop7h 06mUnited Airlines

jue. 1/18:22 amIAD - SAT

Nonstop4h 01mUnited Airlines

Deal found 12/11

$289

mar. 12/305:15 amSAT - IAD

1 stop5h 13mUnited Airlines

vie. 1/28:22 amIAD - SAT

Nonstop4h 01mUnited Airlines

Deal found 12/10

$304

vie. 12/267:05 amSAT - IAD

Nonstop3h 09mUnited Airlines

mar. 12/305:25 pmIAD - SAT

Nonstop3h 59mUnited Airlines

Deal found 12/11

$309

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 diciembre 12, 2025.

jue. 1/17:05 amSAT - IAD

Nonstop3h 09mUnited Airlines

mar. 1/65:50 pmIAD - SAT

Nonstop4h 06mUnited Airlines

Deal found 12/11

$265

jue. 1/85:20 amSAT - IAD

1 stop7h 39mDelta

lun. 1/263:42 pmIAD - SAT

1 stop5h 43mDelta

Deal found 12/11

$269

mar. 1/136:25 amSAT - IAD

1 stop9h 25mSouthwest

mié. 1/149:05 amIAD - SAT

1 stop8h 55mSouthwest

Deal found 12/10

$269

mié. 1/281:20 pmSAT - IAD

1 stop6h 51mUnited Airlines

sáb. 1/3112:50 pmIAD - SAT

1 stop5h 43mUnited Airlines

Deal found 12/11

$269

mar. 1/206:17 pmSAT - IAD

1 stop5h 07mDelta

dom. 1/2512:40 pmIAD - SAT

1 stop5h 42mDelta

Deal found 12/11

$269

jue. 1/154:04 pmSAT - IAD

1 stop5h 14mUnited Airlines

dom. 1/1812:50 pmIAD - SAT

1 stop5h 43mUnited Airlines

Deal found 12/10

$269

sáb. 3/74:00 pmSAT - IAD

1 stop6h 09mDelta

vie. 3/137:20 amIAD - SAT

1 stop6h 22mDelta

Deal found 12/11

$294

vie. 12/267:05 amSAT - IAD

Nonstop3h 09mUnited Airlines

vie. 1/98:15 amIAD - SAT

Nonstop4h 04mUnited Airlines

Deal found 12/11

$279

dom. 3/85:10 amSAT - IAD

1 stop5h 22mDelta

sáb. 3/146:00 amIAD - SAT

1 stop6h 25mDelta

Deal found 12/11

$294

mié. 12/314:05 pmSAT - IAD

1 stop6h 44mUnited Airlines

mar. 1/65:45 pmIAD - SAT

1 stop6h 12mUnited Airlines

Deal found 12/11

$283

vie. 12/262:13 pmSAT - IAD

1 stop7h 06mUnited Airlines

jue. 1/18:22 amIAD - SAT

Nonstop4h 01mUnited Airlines

Deal found 12/11

$289

vie. 12/262:13 pmSAT - IAD

1 stop7h 06mUnited Airlines

mar. 12/305:25 pmIAD - SAT

Nonstop3h 59mUnited Airlines

Deal found 12/11

$319

Last-minute flights from San Antonio to Dulles Intl
Discover last-minute flight deals from San Antonio to Dulles Intl. Data last updated diciembre 12, 2025 and is based on user searches.

vie. 12/267:05 amSAT - IAD

Nonstop3h 09mUnited Airlines

jue. 1/15:25 pmIAD - SAT

Nonstop3h 59mUnited Airlines

Deal found 12/11

$279

vie. 12/265:59 pmSAT - IAD

1 stop4h 50mUnited Airlines

vie. 1/96:03 amIAD - SAT

1 stop5h 44mUnited Airlines

Deal found 12/11

$299

vie. 12/267:05 amSAT - IAD

Nonstop3h 09mUnited Airlines

mar. 12/305:25 pmIAD - SAT

Nonstop3h 59mUnited Airlines

Deal found 12/11

$309

mar. 12/305:15 amSAT - IAD

1 stop5h 13mUnited Airlines

vie. 1/28:22 amIAD - SAT

Nonstop4h 01mUnited Airlines

Deal found 12/10

$304

mié. 12/317:05 amSAT - IAD

Nonstop3h 09mUnited Airlines

mar. 1/65:45 pmIAD - SAT

1 stop6h 12mUnited Airlines

Deal found 12/11

$273

jue. 1/17:05 amSAT - IAD

Nonstop3h 09mUnited Airlines

mar. 1/65:50 pmIAD - SAT

Nonstop4h 06mUnited Airlines

Deal found 12/11

$265

lun. 1/55:25 amSAT - IAD

1 stop6h 45mSouthwest

mié. 1/79:05 amIAD - SAT

1 stop8h 55mSouthwest

Deal found 12/9

$303

jue. 1/154:04 pmSAT - IAD

1 stop5h 14mUnited Airlines

dom. 1/1812:50 pmIAD - SAT

1 stop5h 43mUnited Airlines

Deal found 12/10

$269

mié. 1/286:10 amSAT - IAD

1 stop8h 40mSouthwest

sáb. 1/317:00 amIAD - SAT

2 stops10h 30mSouthwest

Deal found 12/11

$308

jue. 1/2912:31 pmSAT - IAD

2 stops27h 02mMultiple Airlines

dom. 2/19:18 amIAD - SAT

1 stop15h 34mMultiple Airlines

Deal found 12/11

$264

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 diciembre 12, 2025.

jue. 1/87:14 pmSAT - IAD

1 stop11h 41mFrontier

Deal found 12/11

$71

dom. 1/117:14 pmSAT - IAD

1 stop11h 26mFrontier

Deal found 12/10

$78

lun. 1/128:00 pmSAT - IAD

2 stops14h 43mFrontier

Deal found 12/11

$88

lun. 3/93:26 pmSAT - IAD

1 stop8h 05mFrontier

Deal found 12/11

$91

jue. 1/296:30 amSAT - IAD

1 stop25h 10mMultiple Airlines

Deal found 12/10

$97

jue. 2/121:57 pmSAT - IAD

1 stop16h 23mFrontier

Deal found 12/11

$108

mié. 1/216:30 amSAT - IAD

2 stops32h 58mMultiple Airlines

Deal found 12/10

$118

vie. 1/96:30 amSAT - IAD

1 stop25h 38mMultiple Airlines

Deal found 12/10

$131

mar. 1/66:10 amSAT - IAD

1 stop8h 40mSouthwest

Deal found 12/10

$135

Find flight deals from San Antonio to Dulles Intl

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$264 (Kiwi.com)
One-way from	$71 (Trip.com)
Popular in	March
Cheapest in	February
Average price	$418
Good round-trip deal	$368 or less
Good one-way deal	$203 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. 0% potential increase in price ($3 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 December 2025

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

jue. 1/1

7:05 am-11:14 am

Nonstop3h 09m

Washington, D.C. Dulles Intl

mar. 1/6

5:50 pm-8:56 pm

Nonstop4h 06m

$265

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

jue. 1/8

5:20 am-1:59 pm

1 stop7h 39m

Washington, D.C. Dulles Intl

lun. 1/26

3:42 pm-8:25 pm

1 stop5h 43m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

mar. 1/13

6:25 am-4:50 pm

1 stop9h 25m

Washington, D.C. Dulles Intl

mié. 1/14

9:05 am-5:00 pm

1 stop8h 55m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

mié. 1/28

1:20 pm-9:11 pm

1 stop6h 51m

Washington, D.C. Dulles Intl

sáb. 1/31

12:50 pm-5:33 pm

1 stop5h 43m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

mar. 1/20

6:17 pm-12:24 am

1 stop5h 07m

Washington, D.C. Dulles Intl

dom. 1/25

12:40 pm-5:22 pm

1 stop5h 42m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

jue. 1/15

4:04 pm-10:18 pm

1 stop5h 14m

Washington, D.C. Dulles Intl

dom. 1/18

12:50 pm-5:33 pm

1 stop5h 43m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

vie. 12/26

7:05 am-11:14 am

Nonstop3h 09m

Washington, D.C. Dulles Intl

vie. 1/9

8:15 am-11:19 am

Nonstop4h 04m

$279

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

mié. 12/31

4:05 pm-11:49 pm

1 stop6h 44m

Washington, D.C. Dulles Intl

mar. 1/6

5:45 pm-10:57 pm

1 stop6h 12m

$283

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

vie. 12/26

2:13 pm-10:19 pm

1 stop7h 06m

Washington, D.C. Dulles Intl

jue. 1/1

8:22 am-11:23 am

Nonstop4h 01m

$289

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

sáb. 3/7

4:00 pm-11:09 pm

1 stop6h 09m

Washington, D.C. Dulles Intl

vie. 3/13

7:20 am-12:42 pm

1 stop6h 22m

$294

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 23 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 December.

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
Priceline	Price Accuracy1 star	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

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, 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 $299). 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 70% on airfare.

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

7.9

Good

4,253 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

7.9

Good

4,253 reviews

Southwest

7.9

Good

4,253 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

8,008 reviews

Southwest

7.9

Good

4,253 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

9,095 reviews

Southwest

7.9

Good

4,253 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

11,050 reviews

Southwest

7.9

Good

4,253 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 5 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 $265, United Airlines can have you in Washington, D.C. Dulles Intl Airport from San Antonio in 3h 09m. 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 United Airlines and Delta - these airlines can fly you to your destination from $239 and $248, respectively. Users have found that Southwest is 44% 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 $115 on United Airlines. Other airlines that offer cheap prices include Southwest from $125 and Delta from $125 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: United Airlines (96%), Brussels Airlines (95%), 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 $1,044, 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 $237 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 $299). 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
Southwest	Cheapest$204	Average$278	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$238	Average$383	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$248	Average$336	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$318	Average$382	FlexibilityNo cancel fee	On-time71%

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$71+ 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 1/8. 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 July, 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

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 diciembre 12, 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 diciembre 12, 2025.

Find flight deals from San Antonio to Dulles Intl

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

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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 December.

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

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?

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

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

AI-powered summary based on content written by travel experts. AI can make mistakes.

Cheapflights partnered with top experts to bring you the best recommendations for your San Antonio to Washington, D.C. Dulles Intl Airport trip

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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?

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

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 diciembre 12, 2025.