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Cheap flights from San Antonio to Washington, D.C. from $72

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 11/3. 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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Find the cheapest flights from San Antonio to Washington, D.C.

Cheap round-trip flights

Multiple Airlines Logo
5:35 pm - 8:20 pmSAT-IAD
25h 45m1 stop
Multiple Airlines Logo
11:12 am - 10:27 pmIAD-SAT
12h 15m1 stop
$217Multiple Airlines
Find Deal
Mon, Nov 10 - Thu, Nov 20
Frontier Logo
8:26 pm - 3:17 pmSAT-IAD
17h 51m2 stops
Frontier Logo
6:15 am - 4:52 pmIAD-SAT
11h 37m1 stop
$219Frontier
Find Deal
Fri, Oct 24 - Sun, Oct 26
Multiple Airlines Logo
6:00 am - 7:51 pmSAT-IAD
12h 51m1 stop
Multiple Airlines Logo
11:12 am - 10:27 pmIAD-SAT
12h 15m1 stop
$223Multiple Airlines
Find Deal
Thu, Nov 13 - Thu, Nov 20
Frontier Logo
11:33 am - 9:17 amSAT-IAD
20h 44m2 stops
Frontier Logo
10:09 pm - 4:30 pmIAD-SAT
19h 21m2 stops
$224Frontier
Find Deal
Thu, Oct 2 - Sun, Oct 5
Multiple Airlines Logo
6:00 am - 7:51 pmSAT-IAD
12h 51m1 stop
Multiple Airlines Logo
11:12 am - 10:27 pmIAD-SAT
12h 15m1 stop
$226Multiple Airlines
Find Deal
Sat, Nov 8 - Thu, Nov 20
Frontier Logo
5:35 pm - 12:11 amSAT-IAD
5h 36m1 stop
Frontier Logo
6:00 am - 4:40 pmIAD-SAT
11h 40m1 stop
$228Frontier
Find Deal
Fri, Nov 14 - Mon, Nov 17
United Airlines Logo
7:00 am - 11:11 amSAT-IAD
3h 11mnonstop
United Airlines Logo
8:20 am - 11:11 amIAD-SAT
3h 51mnonstop
$249United Airlines
Find Deal
Wed, Dec 10 - Wed, Dec 17
United Airlines Logo
7:00 am - 11:11 amSAT-IAD
3h 11mnonstop
United Airlines Logo
8:30 am - 3:30 pmIAD-SAT
8h 00m1 stop
$253United Airlines
Find Deal
Wed, Dec 10 - Tue, Dec 16
Delta Logo
8:00 am - 4:57 pmSAT-IAD
7h 57m1 stop
Delta Logo
5:52 pm - 12:20 amIAD-SAT
7h 28m1 stop
$257Delta
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Tue, Oct 7 - Tue, Oct 21
Delta Logo
4:35 pm - 11:00 pmSAT-IAD
5h 25m1 stop
Delta Logo
7:05 am - 11:16 amIAD-SAT
5h 11m1 stop
$269Delta
Find Deal
Thu, Oct 30 - Sun, Nov 2

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

Our best Frontier deals on San Antonio to Washington, D.C. Dulles Intl Airport flight tickets
Frontier
Oct 24
SAT8:26 pmSan Antonio
17h 51m
2 stops
IAD3:17 pmWashington, D.C. Dulles Intl
Oct 26
IAD6:15 amWashington, D.C. Dulles Intl
11h 37m
1 stop
SAT4:52 pmSan Antonio
$219
Find similar
Frontier
Oct 2
SAT11:33 amSan Antonio
20h 44m
2 stops
IAD9:17 amWashington, D.C. Dulles Intl
Oct 5
IAD10:09 pmWashington, D.C. Dulles Intl
19h 21m
2 stops
SAT4:30 pmSan Antonio
$224
Find similar
Frontier
Sep 19
SAT5:40 pmSan Antonio
5h 35m
1 stop
IAD12:15 amWashington, D.C. Dulles Intl
Sep 22
IAD6:10 amWashington, D.C. Dulles Intl
11h 20m
1 stop
SAT4:30 pmSan Antonio
$225
Find similar

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
Dec 10
SAT7:00 amSan Antonio
3h 11m
IAD11:11 amWashington, D.C. Dulles Intl
Dec 17
IAD8:20 amWashington, D.C. Dulles Intl
3h 51m
SAT11:11 amSan Antonio
$249
Find similar
United Airlines
Dec 10
SAT7:00 amSan Antonio
3h 11m
IAD11:11 amWashington, D.C. Dulles Intl
Dec 16
IAD8:30 amWashington, D.C. Dulles Intl
8h 00m
1 stop
SAT3:30 pmSan Antonio
$253
Find similar
United Airlines
Oct 31
SAT12:12 pmSan Antonio
3h 12m
IAD4:24 pmWashington, D.C. Dulles Intl
Nov 3
IAD3:59 pmWashington, D.C. Dulles Intl
7h 28m
1 stop
SAT10:27 pmSan Antonio
$259
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from San Antonio to Washington, D.C. Dulles Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated September 17, 2025.
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

Mon 11/10

5:35 pm-8:20 pm

1 stop25h 45m

Washington, D.C. Dulles Intl

Thu 11/20

11:12 am-10:27 pm

1 stop12h 15m

$217

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Fri 10/24

8:26 pm-3:17 pm

2 stops17h 51m

Washington, D.C. Dulles Intl

Sun 10/26

6:15 am-4:52 pm

1 stop11h 37m

$219

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Thu 11/13

6:00 am-7:51 pm

1 stop12h 51m

Washington, D.C. Dulles Intl

Thu 11/20

11:12 am-10:27 pm

1 stop12h 15m

$223

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Thu 10/2

11:33 am-9:17 am

2 stops20h 44m

Washington, D.C. Dulles Intl

Sun 10/5

10:09 pm-4:30 pm

2 stops19h 21m

$224

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Sat 11/8

6:00 am-7:51 pm

1 stop12h 51m

Washington, D.C. Dulles Intl

Thu 11/20

11:12 am-10:27 pm

1 stop12h 15m

$226

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Fri 11/14

5:35 pm-12:11 am

1 stop5h 36m

Washington, D.C. Dulles Intl

Mon 11/17

6:00 am-4:40 pm

1 stop11h 40m

$228

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Wed 12/10

7:00 am-11:11 am

Nonstop3h 11m

Washington, D.C. Dulles Intl

Wed 12/17

8:20 am-11:11 am

Nonstop3h 51m

$249

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Wed 12/10

7:00 am-11:11 am

Nonstop3h 11m

Washington, D.C. Dulles Intl

Tue 12/16

8:30 am-3:30 pm

1 stop8h 00m

$253

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Tue 10/7

8:00 am-4:57 pm

1 stop7h 57m

Washington, D.C. Dulles Intl

Tue 10/21

5:52 pm-12:20 am

1 stop7h 28m

$257

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Thu 10/30

4:35 pm-11:00 pm

1 stop5h 25m

Washington, D.C. Dulles Intl

Sun 11/2

7:05 am-11:16 am

1 stop5h 11m

$269

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

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 $507. 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 $897.

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 $987 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 $377 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 28% 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 September 2025, prices for San Antonio to Washington, D.C. Dulles Intl Airport flights are approximately 155% 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 05m

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 $351.
The fastest flight from San Antonio to Washington, D.C. Dulles Intl Airport takes 3h 05m
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 05m.

  • 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?

  • 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?

  • 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
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $204Free CancellationRating
8.0
4,242 reviews
Search Southwest flights
American AirlinesPriceFrom $218Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $237Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
DeltaPriceFrom $248Free CancellationRating
7.9
7,961 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 18 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 $390. Our users have rated United Airlines at 7.4/10.

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Gettysburg
National Harbor
Arlington
Winchester
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Harpers Ferry
Towson
Rockville
Manassas
Reston
Fairfax
Glen Burnie
Gaithersburg

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.

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