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Cheap flights from Washington, D.C. Dulles Intl Airport to San Antonio from $87

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to San Antonio departing on 1/11. 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 Washington, D.C. Dulles Intl Airport to San Antonio

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:50 pm - 8:56 pm
IAD
-
SAT
4h 06mnonstop
United Airlines Logo
7:25 am - 11:34 am
SAT
-
IAD
3h 09mnonstop
$249United Airlines
Wed, Jan 14 - Sun, Jan 25
Multiple Airlines Logo
7:06 pm - 5:37 am
IAD
-
SAT
35h 31m2 stops
Multiple Airlines Logo
7:14 pm - 7:55 am
SAT
-
IAD
11h 41m1 stop
$256Multiple Airlines
Mon, Jan 5 - Thu, Jan 8
Multiple Airlines Logo
2:58 pm - 11:52 pm
IAD
-
SAT
9h 54m2 stops
Multiple Airlines Logo
6:30 am - 8:04 am
SAT
-
IAD
24h 34m1 stop
$257Multiple Airlines
Fri, Jan 9 - Wed, Jan 14
United Airlines Logo
8:15 am - 11:19 am
IAD
-
SAT
4h 04mnonstop
United Airlines Logo
11:43 am - 8:49 pm
SAT
-
IAD
8h 06m1 stop
$259United Airlines
Thu, Jan 15 - Sun, Jan 18
United Airlines Logo
5:17 pm - 11:13 pm
IAD
-
SAT
6h 56m1 stop
United Airlines Logo
5:25 am - 11:24 am
SAT
-
IAD
4h 59m1 stop
$269United Airlines
Thu, Jan 15 - Sun, Jan 18
Multiple Airlines Logo
11:37 am - 9:40 am
IAD
-
SAT
23h 03m2 stops
Multiple Airlines Logo
6:13 pm - 4:28 pm
SAT
-
IAD
21h 15m1 stop
$271Multiple Airlines
Thu, Jan 22 - Sun, Jan 25
United Airlines Logo
5:30 pm - 8:28 pm
IAD
-
SAT
3h 58mnonstop
United Airlines Logo
7:05 am - 11:21 am
SAT
-
IAD
3h 16mnonstop
$275United Airlines
Fri, Feb 13 - Sun, Feb 15
Frontier Logo
6:05 am - 5:01 pm
IAD
-
SAT
11h 56m1 stop
Frontier Logo
7:14 pm - 7:55 am
SAT
-
IAD
11h 41m1 stop
$277Frontier
Mon, Jan 5 - Thu, Jan 8
Frontier Logo
8:35 am - 7:03 pm
IAD
-
SAT
11h 28m1 stop
Frontier Logo
12:15 pm - 4:24 pm
SAT
-
IAD
3h 09mnonstop
$279Frontier
Mon, Jan 12 - Sun, Jan 18
United Airlines Logo
6:03 am - 10:47 am
IAD
-
SAT
5h 44m1 stop
United Airlines Logo
2:10 pm - 8:41 pm
SAT
-
IAD
5h 31m1 stop
$283United Airlines
Wed, Feb 11 - Mon, Feb 16

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

Our best United Airlines deals on Washington, D.C. Dulles Intl Airport to San Antonio flight tickets
United Airlines
Jan 14
IAD5:50 pmWashington, D.C. Dulles Intl
4h 06m
SAT8:56 pmSan Antonio
Jan 25
SAT7:25 amSan Antonio
3h 09m
IAD11:34 amWashington, D.C. Dulles Intl
$249
Find similar
United Airlines
Jan 15
IAD8:15 amWashington, D.C. Dulles Intl
8h 16m
1 stop
SAT3:31 pmSan Antonio
Jan 19
SAT7:25 amSan Antonio
3h 09m
IAD11:34 amWashington, D.C. Dulles Intl
$259
Find similar
United Airlines
Jan 15
IAD6:03 amWashington, D.C. Dulles Intl
8h 05m
1 stop
SAT1:08 pmSan Antonio
Jan 19
SAT7:00 amSan Antonio
8h 00m
1 stop
IAD4:00 pmWashington, D.C. Dulles Intl
$269
Find similar

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

Our best Southwest deals on Washington, D.C. Dulles Intl Airport to San Antonio flight tickets
Southwest
Jan 20
IAD9:05 amWashington, D.C. Dulles Intl
13h 50m
1 stop
SAT9:55 pmSan Antonio
Jan 23
SAT6:10 amSan Antonio
8h 40m
1 stop
IAD3:50 pmWashington, D.C. Dulles Intl
$304
Find similar
Southwest
Jan 13
IAD9:05 amWashington, D.C. Dulles Intl
8h 55m
1 stop
SAT5:00 pmSan Antonio
Jan 16
SAT5:30 amSan Antonio
10h 30m
1 stop
IAD5:00 pmWashington, D.C. Dulles Intl
$348
Find similar
Southwest
Jan 10
IAD7:00 amWashington, D.C. Dulles Intl
10h 30m
2 stops
SAT4:30 pmSan Antonio
Jan 14
SAT6:25 amSan Antonio
9h 25m
1 stop
IAD4:50 pmWashington, D.C. Dulles Intl
$353
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport to San Antonio 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 December 23, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to San Antonio that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Wed 1/14

5:50 pm-8:56 pm

Nonstop4h 06m

San Antonio

Sun 1/25

7:25 am-11:34 am

Nonstop3h 09m

$249

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Mon 1/5

7:06 pm-5:37 am

2 stops35h 31m

San Antonio

Thu 1/8

7:14 pm-7:55 am

1 stop11h 41m

$256

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Fri 1/9

2:58 pm-11:52 pm

2 stops9h 54m

San Antonio

Wed 1/14

6:30 am-8:04 am

1 stop24h 34m

$257

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Thu 1/15

8:15 am-11:19 am

Nonstop4h 04m

San Antonio

Sun 1/18

11:43 am-8:49 pm

1 stop8h 06m

$259

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Thu 1/15

5:17 pm-11:13 pm

1 stop6h 56m

San Antonio

Sun 1/18

5:25 am-11:24 am

1 stop4h 59m

$269

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Thu 1/22

11:37 am-9:40 am

2 stops23h 03m

San Antonio

Sun 1/25

6:13 pm-4:28 pm

1 stop21h 15m

$271

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Fri 2/13

5:30 pm-8:28 pm

Nonstop3h 58m

San Antonio

Sun 2/15

7:05 am-11:21 am

Nonstop3h 16m

$275

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Mon 1/5

6:05 am-5:01 pm

1 stop11h 56m

San Antonio

Thu 1/8

7:14 pm-7:55 am

1 stop11h 41m

$277

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Mon 1/12

8:35 am-7:03 pm

1 stop11h 28m

San Antonio

Sun 1/18

12:15 pm-4:24 pm

Nonstop3h 09m

$279

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Wed 2/11

6:03 am-10:47 am

1 stop5h 44m

San Antonio

Mon 2/16

2:10 pm-8:41 pm

1 stop5h 31m

$283

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Antonio from

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

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 San Antonio?

If you aren’t able to travel during the month of August, then book flights to San Antonio from Washington, D.C. Dulles Intl Airport during September instead. Flights to San Antonio in September, while not as cheap as those in August, still average around $333.

What is the cheapest day to depart on your flight to San Antonio?

The cheapest day to depart on your flight to San Antonio is on a Wednesday when prices can be found for as low as $341. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to San Antonio on Sunday is $490.

What is the cheapest time of day to depart on your flight to San Antonio?

According to our data, the cheapest time of day to fly to San Antonio is in the evening. momondo users have found flights departing from Washington, D.C. Dulles Intl Airport to San Antonio in the evening for as low as $317. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to San Antonio are more costly in the afternoon, with an average ticket price of $397. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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

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

How far in advance should I book a flight to San Antonio?

You are more likely to see cheaper flights to San Antonio from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to San Antonio for around $384 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Antonio from Washington, D.C. Dulles Intl Airport for as low as $303 on momondo.

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

There are 4 cabin classes available to choose from on Washington, D.C. Dulles Intl to San Antonio 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 Washington, D.C. Dulles Intl Airport to San Antonio flights?

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

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

As of December 2025, prices for Washington, D.C. Dulles Intl Airport to San Antonio flights are approximately 35% more expensive when compared to flights at the same time last year.

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

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

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

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

Best Price Found

$253

Fastest flight time

3h 21m

Direct flights

Every day

Airports in San Antonio

1 airport
The best one-way flight to San Antonio from Washington, D.C. Dulles Intl Airport in the past 72 hours is $253. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to San Antonio found on momondo in the last 72 hours is $276.
The fastest flight from Washington, D.C. Dulles Intl Airport to San Antonio takes 3h 21m
Direct flights go from Washington, D.C. Dulles Intl Airport to San Antonio every day.
There is 1 airport in San Antonio. From Washington, D.C. Dulles Intl Airport there are direct flights to San Antonio (SAT).
Search flight deals

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

    The distance between Washington, D.C. Dulles Intl and San Antonio is about 1365.3 mi. 3h 21m is a normal flight duration for this route.

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

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

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to San Antonio Airport.

  • What documentation or ID do you need to fly to San Antonio Airport?

    The travel and health documents required for your trip to San Antonio Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at San Antonio Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

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

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

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to San Antonio with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $181Free CancellationRating
8.0
4,253 reviews
Search Southwest flights
DeltaPriceFrom $242Free CancellationRating
7.9
8,014 reviews
Search Delta flights
United AirlinesPriceFrom $249Free CancellationRating
7.4
9,105 reviews
Search United Airlines flights
American AirlinesPriceFrom $268Free CancellationRating
7.2
11,054 reviews
Search American Airlines flights

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

    United Airlines flies from Washington, D.C. Dulles Intl Airport to San Antonio around 12 times per week, with 9,105 momondo users rating the airline 7.4/10. The cheapest United Airlines deal from Washington, D.C. Dulles Intl Airport to San Antonio in the last 72 hours was $249 (round-trip), much lower than the average airfare cost of $391 for United Airlines flights on this route.

Traveling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
New Braunfels
Kerrville
Boerne
Schertz
Pleasanton

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Antonio from Washington, D.C..

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

Yes. momondo allows you to filter the results for Washington, D.C. to San Antonio flights to just show those with flexible booking policies.

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

Once all potential Washington, D.C. to San Antonio flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes. momondo can track prices for Washington, D.C. to San Antonio flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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