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 83% 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.

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

Southwest is the most popular carrier operating from San Antonio to Washington, D.C. Dulles Intl

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 January 2026, 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.

$70 Cheap Flights from San Antonio to Washington, D.C. Dulles Intl Airport in 2026

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

As of January 2026, 4 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 Tue, with 100% of weekly flights taking off on this day.

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5:25 am - 11:53 am

SAT

IAD

5h 28m1 stop

10:08 am - 5:22 pm

IAD

SAT

8h 14m1 stop

$269Delta

Fri, Feb 13 - Mon, Feb 16

6:25 am - 4:50 pm

SAT

IAD

9h 25m1 stop

5:30 am - 2:50 pm

IAD

SAT

10h 20m2 stops

$270Southwest

Tue, Feb 3 - Thu, Feb 5

6:25 am - 4:50 pm

SAT

IAD

9h 25m1 stop

5:30 am - 2:50 pm

IAD

SAT

10h 20m2 stops

$272Southwest

Wed, Feb 4 - Mon, Feb 9

2:15 pm - 10:18 pm

SAT

IAD

7h 03m1 stop

5:50 pm - 8:56 pm

IAD

SAT

4h 06mnonstop

$273United Airlines

Tue, Jan 20 - Sun, Feb 1

12:17 pm - 4:30 pm

SAT

IAD

3h 13mnonstop

6:00 am - 11:48 am

IAD

SAT

6h 48m1 stop

$274United Airlines

Thu, Feb 19 - Sun, Feb 22

12:17 pm - 4:30 pm

SAT

IAD

3h 13mnonstop

5:30 pm - 8:28 pm

IAD

SAT

3h 58mnonstop

$275United Airlines

Thu, Feb 19 - Sun, Feb 22

7:05 am - 11:19 am

SAT

IAD

3h 14mnonstop

5:30 pm - 8:28 pm

IAD

SAT

3h 58mnonstop

$276United Airlines

Fri, Feb 20 - Sun, Feb 22

5:30 am - 5:00 pm

SAT

IAD

10h 30m1 stop

7:00 am - 4:30 pm

IAD

SAT

10h 30m2 stops

$277Southwest

Thu, Feb 5 - Sat, Feb 7

12:15 pm - 4:24 pm

SAT

IAD

3h 09mnonstop

5:50 pm - 8:56 pm

IAD

SAT

4h 06mnonstop

$279United Airlines

Tue, Jan 20 - Sun, Feb 1

1:40 pm - 8:45 pm

SAT

IAD

6h 05m1 stop

3:42 pm - 10:28 pm

IAD

SAT

7h 46m1 stop

$283Delta

Tue, Jan 20 - Sun, Jan 25

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

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

Delta

Feb 13

SAT5:25 amSan Antonio

5h 28m

1 stop

IAD11:53 amWashington, D.C. Dulles Intl

Feb 16

IAD10:08 amWashington, D.C. Dulles Intl

8h 14m

1 stop

SAT5:22 pmSan Antonio

$269

Find similar

Delta

Jan 20

SAT1:40 pmSan Antonio

6h 05m

1 stop

IAD8:45 pmWashington, D.C. Dulles Intl

Jan 25

IAD3:42 pmWashington, D.C. Dulles Intl

7h 46m

1 stop

SAT10:28 pmSan Antonio

$283

Find similar

Delta

Jan 17

SAT5:20 amSan Antonio

5h 16m

1 stop

IAD11:36 amWashington, D.C. Dulles Intl

Jan 19

IAD7:05 amWashington, D.C. Dulles Intl

11h 20m

1 stop

SAT5:25 pmSan Antonio

$313

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

Feb 3

SAT6:25 amSan Antonio

9h 25m

1 stop

IAD4:50 pmWashington, D.C. Dulles Intl

Feb 5

IAD5:30 amWashington, D.C. Dulles Intl

10h 20m

2 stops

SAT2:50 pmSan Antonio

$270

Find similar

Southwest

Feb 4

SAT6:25 amSan Antonio

9h 25m

1 stop

IAD4:50 pmWashington, D.C. Dulles Intl

Feb 9

IAD5:30 amWashington, D.C. Dulles Intl

10h 20m

2 stops

SAT2:50 pmSan Antonio

$272

Find similar

Southwest

Feb 5

SAT5:30 amSan Antonio

10h 30m

1 stop

IAD5:00 pmWashington, D.C. Dulles Intl

Feb 7

IAD7:00 amWashington, D.C. Dulles Intl

10h 30m

2 stops

SAT4:30 pmSan Antonio

$277

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

Fri 2/13

5:25 am-11:53 am

1 stop5h 28m

Washington, D.C. Dulles Intl

Mon 2/16

10:08 am-5:22 pm

1 stop8h 14m

$269

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Tue 2/3

6:25 am-4:50 pm

1 stop9h 25m

Washington, D.C. Dulles Intl

Thu 2/5

5:30 am-2:50 pm

2 stops10h 20m

$270

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Wed 2/4

6:25 am-4:50 pm

1 stop9h 25m

Washington, D.C. Dulles Intl

Mon 2/9

5:30 am-2:50 pm

2 stops10h 20m

$272

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Tue 1/20

2:15 pm-10:18 pm

1 stop7h 03m

Washington, D.C. Dulles Intl

Sun 2/1

5:50 pm-8:56 pm

Nonstop4h 06m

$273

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Thu 2/19

12:17 pm-4:30 pm

Nonstop3h 13m

Washington, D.C. Dulles Intl

Sun 2/22

6:00 am-11:48 am

1 stop6h 48m

$274

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Thu 2/19

12:17 pm-4:30 pm

Nonstop3h 13m

Washington, D.C. Dulles Intl

Sun 2/22

5:30 pm-8:28 pm

Nonstop3h 58m

$275

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Fri 2/20

7:05 am-11:19 am

Nonstop3h 14m

Washington, D.C. Dulles Intl

Sun 2/22

5:30 pm-8:28 pm

Nonstop3h 58m

$276

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Thu 2/5

5:30 am-5:00 pm

1 stop10h 30m

Washington, D.C. Dulles Intl

Sat 2/7

7:00 am-4:30 pm

2 stops10h 30m

$277

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Tue 1/20

12:15 pm-4:24 pm

Nonstop3h 09m

Washington, D.C. Dulles Intl

Sun 2/1

5:50 pm-8:56 pm

Nonstop4h 06m

$279

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Tue 1/20

1:40 pm-8:45 pm

1 stop6h 05m

Washington, D.C. Dulles Intl

Sun 1/25

3:42 pm-10:28 pm

1 stop7h 46m

$283

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

Airlines

Other information

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 August is also cheap. Prices for this month can be found on momondo for an average of $324.

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

Our data shows that Thursday 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 $488. 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 $855.

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 in the morning is the least expensive time of day to depart. momondo users have found prices as low as $655 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $983 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 $362 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?

You could potentially save up to 29% on your flight if you consider stops on a San Antonio to Washington, D.C. Dulles Intl Airport flight.

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

As of January 2026, prices for San Antonio to Washington, D.C. Dulles Intl Airport flights are approximately 15% cheaper 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	$196
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 $196. 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 $331.

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 January 2026, 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 27.70% of the total bookings. Other popular models include Boeing 737-800 with 19.51%, Boeing 737 MAX 9 with 12.20%, and Boeing 737 MAX 8 with 9.23%.
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 86% of all bookings. The subsequent popular airlines are Delta at 10%, American Airlines at 3%, 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
American Airlines	PriceFrom $185	Free Cancellation	Rating 7.2 11,088 reviews	Search American Airlines flights
Southwest	PriceFrom $204	Free Cancellation	Rating 8.0 4,249 reviews	Search Southwest flights
United Airlines	PriceFrom $236	Free Cancellation	Rating 7.4 9,138 reviews	Search United Airlines flights
Delta	PriceFrom $248	Free Cancellation	Rating 7.9 8,022 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 1 flight/week on average for this route. A good United Airlines flight deal for San Antonio to Washington, D.C. Dulles Intl Airport starts from $236 round-trip, up to an average price of $375. Our users have rated United Airlines at 7.4/10.

Alexandria

National Harbor

Gettysburg

Arlington

Winchester

Waldorf

Woodbridge

Tysons

Laurel

Colonial Beach

Silver Spring

Towson

Fredericksburg

Rockville

Gaithersburg

Harpers Ferry

Manassas

Sterling

Fairfax

Springfield

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 $70

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 2/28. 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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Delta flights from San Antonio to Washington, D.C. Dulles Intl Airport

Our best Delta 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

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.

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

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?

You could potentially save up to 29% on your flight if you consider stops on a San Antonio to Washington, D.C. Dulles Intl Airport flight.

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

As of January 2026, prices for San Antonio to Washington, D.C. Dulles Intl Airport flights are approximately 15% cheaper 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?

Southwest is the most popular carrier 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 week?

As of January 2026, 4 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 Tue, with 100% 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.

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