What is the cheapest airline that flies from San Antonio to Washington, D.C. Dulles Intl?

Frontier, Southwest, and United Airlines are the most popular carriers operating from San Antonio to Washington, D.C. Dulles Intl

What airlines fly to Washington, D.C. Dulles Intl Airport?

United Airlines, Delta and Allegiant Air are the top three most popular airlines that fly to Washington, D.C. Dulles Intl Airport from San Antonio according to our data. United Airlines is the first choice among our users, with 82% of people opting to fly with this airline when traveling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 6 different airlines that fly to Washington, D.C. Dulles Intl Airport on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from San Antonio Airport to Washington, D.C. Dulles Intl Airport?

Prices for flights from San Antonio Airport to Washington, D.C. Dulles Intl Airport refresh daily.

How many operators does momondo search for flights from San Antonio Airport to Washington, D.C. Dulles Intl Airport?

As of November 2025, there are 4 operators available to choose from for flights from San Antonio Airport to Washington, D.C. Dulles Intl Airport.

How old do you have to be to fly from San Antonio Airport to Washington, D.C. Dulles Intl Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Antonio Airport to Washington, D.C. Dulles Intl Airport.

What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

The necessary travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$75 Cheap Flights from San Antonio to Washington, D.C. Dulles Intl Airport in 2025/26

Q: How many flights depart from San Antonio to Washington, D.C. Dulles Intl Airport on average per week?

As of November 2025, 41 flights take off from San Antonio and land in Washington, D.C. Dulles Intl Airport each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.

Q: What is the typical price of a round-trip flight between San Antonio and Washington, D.C. Dulles Intl Airport?

Prices are currently low for flights on this route. Typical prices usually range from $297 to $542. The lowest price recently found on this route was $249.

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12:15 pm - 4:24 pmSAT-IAD

3h 09mnonstop

8:15 am - 11:19 amIAD-SAT

4h 04mnonstop

$249United Airlines

Find Deal

Sun, Jan 11 - Sun, Jan 18

8:25 pm - 8:20 pmSAT-IAD

22h 55m2 stops

11:12 am - 7:38 pmIAD-SAT

9h 26m1 stop

$253Multiple Airlines

Find Deal

Mon, Nov 17 - Thu, Nov 20

8:50 am - 8:24 pmSAT-IAD

10h 34m1 stop

9:20 pm - 7:55 amIAD-SAT

11h 35m1 stop

$261Frontier

Find Deal

Sun, Dec 7 - Sat, Dec 13

5:30 am - 5:00 pmSAT-IAD

10h 30m1 stop

5:30 am - 2:05 pmIAD-SAT

9h 35m1 stop

$272Southwest

Find Deal

Sun, Jan 11 - Thu, Jan 15

5:07 pm - 11:59 pmSAT-IAD

5h 52m1 stop

5:45 am - 4:51 pmIAD-SAT

12h 06m1 stop

$274Frontier

Find Deal

Mon, Dec 1 - Fri, Dec 5

4:52 pm - 12:12 amSAT-IAD

6h 20m1 stop

7:35 pm - 12:34 amIAD-SAT

5h 59m1 stop

$290Delta

Find Deal

Mon, Dec 8 - Tue, Dec 9

12:46 pm - 11:29 pmSAT-IAD

9h 43m1 stop

6:00 am - 10:11 amIAD-SAT

5h 11m1 stop

$303Delta

Find Deal

Fri, Dec 12 - Sun, Jan 4

10:10 am - 9:55 pmSAT-IAD

10h 45m2 stops

5:30 am - 2:05 pmIAD-SAT

9h 35m1 stop

$308Southwest

Find Deal

Wed, Feb 4 - Fri, Feb 6

4:30 pm - 10:28 pmSAT-IAD

4h 58m1 stop

2:16 pm - 10:00 pmIAD-SAT

8h 44m2 stops

$322American Airlines

Find Deal

Sat, Dec 13 - Wed, Dec 17

12:55 pm - 12:01 amSAT-IAD

10h 06m2 stops

2:16 pm - 10:00 pmIAD-SAT

8h 44m2 stops

$327American Airlines

Find Deal

Sat, Dec 13 - Wed, Dec 17

United Airlines flights from San Antonio to Washington, D.C. Dulles Intl Airport

Our best United Airlines deals on San Antonio to Washington, D.C. Dulles Intl Airport flight tickets

United Airlines

Jan 11

SAT12:15 pmSan Antonio

3h 09m

IAD4:24 pmWashington, D.C. Dulles Intl

Jan 18

IAD8:15 amWashington, D.C. Dulles Intl

4h 04m

SAT11:19 amSan Antonio

$249

Find similar

United Airlines

Nov 26

SAT12:12 pmSan Antonio

3h 11m

IAD4:23 pmWashington, D.C. Dulles Intl

Nov 28

IAD6:30 amWashington, D.C. Dulles Intl

6h 38m

1 stop

SAT12:08 pmSan Antonio

$259

Find similar

United Airlines

Dec 5

SAT5:20 pmSan Antonio

5h 35m

1 stop

IAD11:55 pmWashington, D.C. Dulles Intl

Dec 6

IAD8:45 amWashington, D.C. Dulles Intl

7h 31m

1 stop

SAT3:16 pmSan Antonio

$264

Find similar

Southwest flights from San Antonio to Washington, D.C. Dulles Intl Airport

Our best Southwest deals on San Antonio to Washington, D.C. Dulles Intl Airport flight tickets

Southwest

Jan 11

SAT5:30 amSan Antonio

10h 30m

1 stop

IAD5:00 pmWashington, D.C. Dulles Intl

Jan 15

IAD5:30 amWashington, D.C. Dulles Intl

9h 35m

1 stop

SAT2:05 pmSan Antonio

$272

Find similar

Southwest

Feb 4

SAT10:10 amSan Antonio

10h 45m

2 stops

IAD9:55 pmWashington, D.C. Dulles Intl

Feb 6

IAD5:30 amWashington, D.C. Dulles Intl

9h 35m

1 stop

SAT2:05 pmSan Antonio

$308

Find similar

Southwest

Dec 19

SAT5:20 amSan Antonio

6h 45m

1 stop

IAD1:05 pmWashington, D.C. Dulles Intl

Jan 2

IAD5:00 amWashington, D.C. Dulles Intl

7h 00m

1 stop

SAT11:00 amSan Antonio

$323

Find similar

momondo 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

Sun 1/11

12:15 pm-4:24 pm

Nonstop3h 09m

Washington, D.C. Dulles Intl

Sun 1/18

8:15 am-11:19 am

Nonstop4h 04m

$249

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Mon 11/17

8:25 pm-8:20 pm

2 stops22h 55m

Washington, D.C. Dulles Intl

Thu 11/20

11:12 am-7:38 pm

1 stop9h 26m

$253

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Sun 12/7

8:50 am-8:24 pm

1 stop10h 34m

Washington, D.C. Dulles Intl

Sat 12/13

9:20 pm-7:55 am

1 stop11h 35m

$261

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Sun 1/11

5:30 am-5:00 pm

1 stop10h 30m

Washington, D.C. Dulles Intl

Thu 1/15

5:30 am-2:05 pm

1 stop9h 35m

$272

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Mon 12/1

5:07 pm-11:59 pm

1 stop5h 52m

Washington, D.C. Dulles Intl

Fri 12/5

5:45 am-4:51 pm

1 stop12h 06m

$274

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Mon 12/8

4:52 pm-12:12 am

1 stop6h 20m

Washington, D.C. Dulles Intl

Tue 12/9

7:35 pm-12:34 am

1 stop5h 59m

$290

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Fri 12/12

12:46 pm-11:29 pm

1 stop9h 43m

Washington, D.C. Dulles Intl

Sun 1/4

6:00 am-10:11 am

1 stop5h 11m

$303

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Wed 2/4

10:10 am-9:55 pm

2 stops10h 45m

Washington, D.C. Dulles Intl

Fri 2/6

5:30 am-2:05 pm

1 stop9h 35m

$308

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Sat 12/13

4:30 pm-10:28 pm

1 stop4h 58m

Washington, D.C. Dulles Intl

Wed 12/17

2:16 pm-10:00 pm

2 stops8h 44m

$322

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Sat 12/13

12:55 pm-12:01 am

2 stops10h 06m

Washington, D.C. Dulles Intl

Wed 12/17

2:16 pm-10:00 pm

2 stops8h 44m

$327

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from San Antonio to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

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Other information

What is the typical price of a round-trip flight between San Antonio and Washington, D.C. Dulles Intl Airport?

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

In general, February is the cheapest month to fly from San Antonio to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $309. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of February, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $329.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Friday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $484. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from San Antonio to Washington, D.C. Dulles Intl Airport for around $872.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from San Antonio at noon is the least expensive time of day to depart. momondo users have found prices as low as $296 when looking at flights departing at noon. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $989 on average. Flights to Washington, D.C. Dulles Intl Airport from San Antonio in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest San Antonio to Washington, D.C. Dulles Intl flight route?

Fly from San Antonio to Washington, D.C. Dulles Intl for the best San Antonio - Washington, D.C. Dulles Intl flight prices

How far in advance should I book a flight to Washington, D.C. Dulles Intl Airport?

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from San Antonio when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around $369 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport from San Antonio for as low as $250 on momondo.

What cabin class options are available on San Antonio to Washington, D.C. Dulles Intl flights?

There are 4 cabin classes available to choose from on San Antonio to Washington, D.C. Dulles Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on San Antonio to Washington, D.C. Dulles Intl Airport flights?

No. A direct flight is the cheapest option for a flight between San Antonio to Washington, D.C. Dulles Intl Airport.

How have San Antonio to Washington, D.C. Dulles Intl Airport flight prices changed over time?

As of November 2025, prices for San Antonio to Washington, D.C. Dulles Intl Airport flights are approximately 18% more expensive when compared to flights at the same time last year.

When to book flights from San Antonio to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from San Antonio to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap San Antonio to Washington, D.C. Dulles Intl Airport (SAT to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Antonio to Washington, D.C. Dulles Intl Airport

Best Price Found	$253
Fastest flight time	3h 09m
Direct flights	Every day

The best one-way flight to Washington, D.C. Dulles Intl Airport from San Antonio in the past 72 hours is $253. The best round-trip flight deal from San Antonio to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $386.

The fastest flight from San Antonio to Washington, D.C. Dulles Intl Airport takes 3h 09m

Direct flights go from San Antonio to Washington, D.C. Dulles Intl Airport every day.

Search flight deals

How far is San Antonio to Washington, D.C. Dulles Intl by plane?
San Antonio and Washington, D.C. Dulles Intl are 1365.3 mi apart from one another. In terms of flight time, this usually takes a little over 3h 09m.
When did momondo last update prices for flights from San Antonio Airport to Washington, D.C. Dulles Intl Airport?
Prices for flights from San Antonio Airport to Washington, D.C. Dulles Intl Airport refresh daily.
How many operators does momondo search for flights from San Antonio Airport to Washington, D.C. Dulles Intl Airport?
As of November 2025, there are 4 operators available to choose from for flights from San Antonio Airport to Washington, D.C. Dulles Intl Airport.
How old do you have to be to fly from San Antonio Airport to Washington, D.C. Dulles Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Antonio Airport to Washington, D.C. Dulles Intl Airport.
What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?
The necessary travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from San Antonio to Washington, D.C. Dulles Intl Airport?
Based on momondo bookings for flights between San Antonio and Washington, D.C. Dulles Intl Airport, the leading plane model is Boeing 737-900, making up 33.03% of the total bookings. Other popular models include Airbus A319 with 18.63%, Boeing 737-800 with 12.73%, and Boeing 737 MAX 9 with 7.01%.
What is the most popular airline from San Antonio to Washington, D.C. Dulles Intl Airport?
momondo data reveals that the most frequently booked airline on the route from San Antonio to Washington, D.C. Dulles Intl Airport is United Airlines, representing 82% of all bookings. The subsequent popular airlines are Delta at 11%, American Airlines at 5%, and Southwest at 2%.

Best airlines flying from San Antonio to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from San Antonio to Washington, D.C. Dulles Intl Airport with momondo

Airline	Rating	Free Cancellation	Price
Southwest	PriceFrom $204	Free Cancellation	Rating 8.0 4,240 reviews	Search Southwest flights
American Airlines	PriceFrom $218	Free Cancellation	Rating 7.2 11,042 reviews	Search American Airlines flights
United Airlines	PriceFrom $237	Free Cancellation	Rating 7.4 9,002 reviews	Search United Airlines flights
Delta	PriceFrom $248	Free Cancellation	Rating 7.9 8,004 reviews	Search Delta flights

United Airlines Flights From San Antonio to Washington, D.C. Dulles Intl Airport
United Airlines is one of the most popular airlines flying from San Antonio to Washington, D.C. Dulles Intl Airport, operating 13 flights/week on average for this route. A good United Airlines flight deal for San Antonio to Washington, D.C. Dulles Intl Airport starts from $237 round-trip, up to an average price of $379. Our users have rated United Airlines at 7.4/10.

Alexandria

National Harbor

Gettysburg

Arlington

Winchester

Woodbridge

Waldorf

Tysons

Laurel

Colonial Beach

Silver Spring

Fredericksburg

Harpers Ferry

Towson

Rockville

Reston

Manassas

Gaithersburg

Fairfax

Glen Burnie

Why use momondo?

Why should I use momondo to find a flight deal from San Antonio to Washington, D.C.?

It is quick and easy to find San Antonio to Washington, D.C. flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington, D.C. that suits you.

Can I find flights from San Antonio to Washington, D.C. with flexible booking policies on momondo?

All flight searches from San Antonio to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from San Antonio to Washington, D.C.?

Once you have performed a search for San Antonio to Washington, D.C. flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from San Antonio to Washington, D.C. right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Washington, D.C. from San Antonio. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Washington, D.C. Dulles Intl Airport trip

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Washington, D.C. Dulles Intl Airport flight routes

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Cheap flights from San Antonio to Washington, D.C. from $75

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Antonio to Washington, D.C. departing on 2/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from San Antonio to Washington, D.C. Dulles Intl Airport

Our best United Airlines deals on San Antonio to Washington, D.C. Dulles Intl Airport flight tickets

Southwest flights from San Antonio to Washington, D.C. Dulles Intl Airport

Our best Southwest deals on San Antonio to Washington, D.C. Dulles Intl Airport flight tickets

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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from San Antonio to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between San Antonio and Washington, D.C. Dulles Intl Airport?

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

What is the cheapest San Antonio to Washington, D.C. Dulles Intl flight route?

Fly from San Antonio to Washington, D.C. Dulles Intl for the best San Antonio - Washington, D.C. Dulles Intl flight prices

How far in advance should I book a flight to Washington, D.C. Dulles Intl Airport?

What cabin class options are available on San Antonio to Washington, D.C. Dulles Intl flights?

There are 4 cabin classes available to choose from on San Antonio to Washington, D.C. Dulles Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on San Antonio to Washington, D.C. Dulles Intl Airport flights?

No. A direct flight is the cheapest option for a flight between San Antonio to Washington, D.C. Dulles Intl Airport.

How have San Antonio to Washington, D.C. Dulles Intl Airport flight prices changed over time?

As of November 2025, prices for San Antonio to Washington, D.C. Dulles Intl Airport flights are approximately 18% more expensive when compared to flights at the same time last year.

What is the cheapest airline that flies from San Antonio to Washington, D.C. Dulles Intl?

Frontier, Southwest, and United Airlines are the most popular carriers operating from San Antonio to Washington, D.C. Dulles Intl

What airlines fly to Washington, D.C. Dulles Intl Airport?

How many flights depart from San Antonio to Washington, D.C. Dulles Intl Airport on average per day?

As of November 2025, there are 5 flights per day flying from San Antonio to Washington, D.C. Dulles Intl Airport. The most common time of day flights depart is 12:00PM, with 62% of flights taking off in the afternoon.

How many flights depart from San Antonio to Washington, D.C. Dulles Intl Airport on average per week?

As of November 2025, 41 flights take off from San Antonio and land in Washington, D.C. Dulles Intl Airport each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.

When to book flights from San Antonio to Washington, D.C. Dulles Intl Airport

Cheap San Antonio to Washington, D.C. Dulles Intl Airport (SAT to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Antonio to Washington, D.C. Dulles Intl Airport

Best Price Found

Fastest flight time

Direct flights

How far is San Antonio to Washington, D.C. Dulles Intl by plane?

When did momondo last update prices for flights from San Antonio Airport to Washington, D.C. Dulles Intl Airport?

How many operators does momondo search for flights from San Antonio Airport to Washington, D.C. Dulles Intl Airport?

How old do you have to be to fly from San Antonio Airport to Washington, D.C. Dulles Intl Airport?

What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

What is the most popular plane model from San Antonio to Washington, D.C. Dulles Intl Airport?

What is the most popular airline from San Antonio to Washington, D.C. Dulles Intl Airport?

Best airlines flying from San Antonio to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from San Antonio to Washington, D.C. Dulles Intl Airport with momondo

United Airlines Flights From San Antonio to Washington, D.C. Dulles Intl Airport

Traveling to a place near Washington, D.C.?

Why use momondo?

Why should I use momondo to find a flight deal from San Antonio to Washington, D.C.?

Can I find flights from San Antonio to Washington, D.C. with flexible booking policies on momondo?

How can momondo help me find flights from San Antonio to Washington, D.C.?

I’m not ready to book a flight from San Antonio to Washington, D.C. right now. Can momondo alert me if prices change?

An easier way to manage your Washington, D.C. Dulles Intl Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Washington, D.C.

Popular cities in the United States

Popular flights according to clicks in the last 7 days on momondo