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Cheap flights from San Antonio to Washington, D.C. from $71

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 9/19. 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. (SAT-IAD)

Cheap round-trip flights

Frontier Logo
5:40 pm - 7:55 pmSAT-IAD
25h 15m1 stop
Frontier Logo
6:10 am - 11:46 amIAD-SAT
30h 36m2 stops
$209Frontier
Find Deal
Mon, Sep 22 - Thu, Oct 2
Frontier Logo
7:10 pm - 8:53 pmSAT-IAD
24h 43m1 stop
Frontier Logo
6:04 am - 4:50 pmIAD-SAT
11h 46m1 stop
$217Frontier
Find Deal
Fri, Oct 10 - Mon, Oct 13
Frontier Logo
5:40 pm - 6:24 pmSAT-IAD
23h 44m2 stops
Frontier Logo
9:15 am - 10:48 amIAD-SAT
26h 33m1 stop
$218Frontier
Find Deal
Fri, Sep 26 - Wed, Oct 1
Delta Logo
8:00 am - 4:27 pmSAT-IAD
7h 27m1 stop
Delta Logo
5:55 pm - 11:59 pmIAD-SAT
7h 04m1 stop
$219Delta
Find Deal
Thu, Sep 18 - Tue, Sep 23
Delta Logo
8:00 am - 4:57 pmSAT-IAD
7h 57m1 stop
Delta Logo
6:05 am - 10:40 amIAD-SAT
5h 35m1 stop
$229Delta
Find Deal
Tue, Oct 7 - Tue, Oct 21
United Airlines Logo
12:00 pm - 4:20 pmSAT-IAD
3h 20mnonstop
United Airlines Logo
5:33 pm - 8:05 pmIAD-SAT
3h 32mnonstop
$249United Airlines
Find Deal
Wed, Sep 24 - Wed, Oct 1
Southwest Logo
5:55 am - 4:10 pmSAT-IAD
9h 15m1 stop
Southwest Logo
7:40 am - 4:10 pmIAD-SAT
9h 30m1 stop
$253Southwest
Find Deal
Fri, Oct 31 - Wed, Nov 5
United Airlines Logo
8:55 am - 4:43 pmSAT-IAD
6h 48m1 stop
United Airlines Logo
5:33 pm - 8:05 pmIAD-SAT
3h 32mnonstop
$255United Airlines
Find Deal
Tue, Sep 23 - Tue, Sep 30
American Airlines Logo
5:00 am - 1:51 pmSAT-IAD
7h 51m2 stops
American Airlines Logo
6:25 am - 5:47 pmIAD-SAT
12h 22m1 stop
$301American Airlines
Find Deal
Wed, Sep 24 - Wed, Oct 1
American Airlines Logo
6:05 am - 1:48 pmSAT-IAD
6h 43m1 stop
American Airlines Logo
6:04 am - 5:00 pmIAD-SAT
11h 56m1 stop
$306American Airlines
Find Deal
Thu, Oct 30 - Mon, Nov 3

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
Sep 18
SAT8:00 amSan Antonio
7h 27m
1 stop
IAD4:27 pmWashington, D.C. Dulles Intl
Sep 23
IAD5:55 pmWashington, D.C. Dulles Intl
7h 04m
1 stop
SAT11:59 pmSan Antonio
$219
Find similar
Delta
Oct 7
SAT8:00 amSan Antonio
7h 57m
1 stop
IAD4:57 pmWashington, D.C. Dulles Intl
Oct 21
IAD6:05 amWashington, D.C. Dulles Intl
5h 35m
1 stop
SAT10:40 amSan Antonio
$229
Find similar
Delta
Sep 23
SAT8:00 amSan Antonio
5h 33m
1 stop
IAD2:33 pmWashington, D.C. Dulles Intl
Sep 30
IAD6:15 amWashington, D.C. Dulles Intl
6h 35m
1 stop
SAT11:50 amSan Antonio
$237
Find similar

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
Sep 22
SAT5:40 pmSan Antonio
25h 15m
1 stop
IAD7:55 pmWashington, D.C. Dulles Intl
Oct 2
IAD6:10 amWashington, D.C. Dulles Intl
30h 36m
2 stops
SAT11:46 amSan Antonio
$209
Find similar
Frontier
Oct 10
SAT7:10 pmSan Antonio
24h 43m
1 stop
IAD8:53 pmWashington, D.C. Dulles Intl
Oct 13
IAD6:04 amWashington, D.C. Dulles Intl
11h 46m
1 stop
SAT4:50 pmSan Antonio
$217
Find similar
Frontier
Sep 26
SAT5:40 pmSan Antonio
23h 44m
2 stops
IAD6:24 pmWashington, D.C. Dulles Intl
Oct 1
IAD9:15 amWashington, D.C. Dulles Intl
26h 33m
1 stop
SAT10:48 amSan Antonio
$218
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 August 28, 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 9/22

5:40 pm-7:55 pm

1 stop25h 15m

Washington, D.C. Dulles Intl

Thu 10/2

6:10 am-11:46 am

2 stops30h 36m

$209

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Fri 10/10

7:10 pm-8:53 pm

1 stop24h 43m

Washington, D.C. Dulles Intl

Mon 10/13

6:04 am-4:50 pm

1 stop11h 46m

$217

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Fri 9/26

5:40 pm-6:24 pm

2 stops23h 44m

Washington, D.C. Dulles Intl

Wed 10/1

9:15 am-10:48 am

1 stop26h 33m

$218

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Thu 9/18

8:00 am-4:27 pm

1 stop7h 27m

Washington, D.C. Dulles Intl

Tue 9/23

5:55 pm-11:59 pm

1 stop7h 04m

$219

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

6:05 am-10:40 am

1 stop5h 35m

$229

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Wed 9/24

12:00 pm-4:20 pm

Nonstop3h 20m

Washington, D.C. Dulles Intl

Wed 10/1

5:33 pm-8:05 pm

Nonstop3h 32m

$249

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Fri 10/31

5:55 am-4:10 pm

1 stop9h 15m

Washington, D.C. Dulles Intl

Wed 11/5

7:40 am-4:10 pm

1 stop9h 30m

$253

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Tue 9/23

8:55 am-4:43 pm

1 stop6h 48m

Washington, D.C. Dulles Intl

Tue 9/30

5:33 pm-8:05 pm

Nonstop3h 32m

$255

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Wed 9/24

5:00 am-1:51 pm

2 stops7h 51m

Washington, D.C. Dulles Intl

Wed 10/1

6:25 am-5:47 pm

1 stop12h 22m

$301

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Thu 10/30

6:05 am-1:48 pm

1 stop6h 43m

Washington, D.C. Dulles Intl

Mon 11/3

6:04 am-5:00 pm

1 stop11h 56m

$306

Flights are sorted by cheapest round-trip flights first.

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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 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 July 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 $497. 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 $878.

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 $382 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 12% 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 August 2025, prices for San Antonio to Washington, D.C. Dulles Intl Airport flights are approximately 24% 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

$257

Fastest flight time

3h 05m

Direct flights

Mon, Tue, Thu, Fri, Sat and Sun
The best one-way flight to Washington, D.C. Dulles Intl Airport from San Antonio in the past 72 hours is $257. 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 $423.
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 on Monday, Tuesday, Thursday, Friday, Saturday and Sunday. The only airline offering direct flights is United Airlines.
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 19m.

  • 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
8,944 reviews
Search United Airlines flights
DeltaPriceFrom $248Free CancellationRating
7.9
7,977 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 17 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 $396. 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
Arlington
National Harbor
Winchester
Woodbridge
Waldorf
Tysons
Laurel
Silver Spring
Colonial Beach
Fredericksburg
Harpers Ferry
Towson
Manassas
Rockville
Gaithersburg
Reston
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.

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