Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Washington, D.C. Dulles Intl Airport to San Antonio from $108

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 12/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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.
Multiple Airlines Logo
5:34 pm - 6:32 pmIAD-SAT
25h 58m2 stops
Multiple Airlines Logo
5:35 pm - 12:11 amSAT-IAD
5h 36m1 stop
$252Multiple Airlines
Find Deal
Fri, Nov 7 - Mon, Nov 10
Frontier Logo
5:34 pm - 4:40 pmIAD-SAT
24h 06m1 stop
Frontier Logo
8:25 pm - 8:20 pmSAT-IAD
22h 55m2 stops
$253Frontier
Find Deal
Thu, Nov 13 - Mon, Nov 17
American Airlines Logo
2:16 pm - 10:00 pmIAD-SAT
8h 44m2 stops
American Airlines Logo
6:00 am - 4:14 pmSAT-IAD
9h 14m1 stop
$255American Airlines
Find Deal
Wed, Dec 10 - Wed, Dec 17
American Airlines Logo
6:00 am - 12:02 pmIAD-SAT
7h 02m1 stop
American Airlines Logo
10:37 am - 9:17 pmSAT-IAD
9h 40m1 stop
$257American Airlines
Find Deal
Fri, Jan 16 - Tue, Jan 20
United Airlines Logo
8:15 am - 11:06 amIAD-SAT
3h 51mnonstop
United Airlines Logo
5:13 pm - 11:59 pmSAT-IAD
5h 46m1 stop
$259United Airlines
Find Deal
Fri, Nov 14 - Sun, Nov 16
Southwest Logo
5:30 am - 2:05 pmIAD-SAT
9h 35m1 stop
Southwest Logo
6:25 am - 4:50 pmSAT-IAD
9h 25m1 stop
$265Southwest
Find Deal
Fri, Jan 16 - Sun, Jan 18
Delta Logo
7:21 pm - 12:38 amIAD-SAT
6h 17m1 stop
Delta Logo
4:57 pm - 12:16 amSAT-IAD
6h 19m1 stop
$269Delta
Find Deal
Thu, Nov 13 - Mon, Nov 17
Southwest Logo
5:05 am - 11:00 amIAD-SAT
6h 55m1 stop
Southwest Logo
12:10 pm - 11:25 pmSAT-IAD
10h 15m1 stop
$274Southwest
Find Deal
Sun, Nov 23 - Wed, Nov 26
United Airlines Logo
5:50 pm - 8:56 pmIAD-SAT
4h 06mnonstop
United Airlines Logo
2:05 pm - 9:17 pmSAT-IAD
6h 12m1 stop
$277United Airlines
Find Deal
Fri, Jan 16 - Mon, Jan 19
Delta Logo
7:01 am - 12:11 pmIAD-SAT
6h 10m1 stop
Delta Logo
6:30 am - 1:55 pmSAT-IAD
6h 25m1 stop
$303Delta
Find Deal
Fri, Dec 19 - Tue, Jan 6

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

Our best Frontier deals on Washington, D.C. Dulles Intl Airport to San Antonio flight tickets
Frontier
Nov 13
IAD5:34 pmWashington, D.C. Dulles Intl
24h 06m
1 stop
SAT4:40 pmSan Antonio
Nov 17
SAT8:25 pmSan Antonio
22h 55m
2 stops
IAD8:20 pmWashington, D.C. Dulles Intl
$253
Find similar
Frontier
Nov 6
IAD5:34 pmWashington, D.C. Dulles Intl
24h 06m
1 stop
SAT4:40 pmSan Antonio
Nov 10
SAT5:35 pmSan Antonio
5h 36m
1 stop
IAD12:11 amWashington, D.C. Dulles Intl
$259
Find similar
Frontier
Nov 24
IAD6:55 amWashington, D.C. Dulles Intl
10h 13m
1 stop
SAT4:08 pmSan Antonio
Dec 1
SAT5:07 pmSan Antonio
5h 52m
1 stop
IAD11:59 pmWashington, D.C. Dulles Intl
$282
Find similar

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

Our best American Airlines deals on Washington, D.C. Dulles Intl Airport to San Antonio flight tickets
American Airlines
Dec 10
IAD2:16 pmWashington, D.C. Dulles Intl
8h 44m
2 stops
SAT10:00 pmSan Antonio
Dec 17
SAT6:00 amSan Antonio
9h 14m
1 stop
IAD4:14 pmWashington, D.C. Dulles Intl
$255
Find similar
American Airlines
Jan 16
IAD6:00 amWashington, D.C. Dulles Intl
7h 02m
1 stop
SAT12:02 pmSan Antonio
Jan 20
SAT10:37 amSan Antonio
9h 40m
1 stop
IAD9:17 pmWashington, D.C. Dulles Intl
$257
Find similar
American Airlines
Jan 15
IAD6:14 amWashington, D.C. Dulles Intl
11h 31m
1 stop
SAT4:45 pmSan Antonio
Jan 18
SAT10:37 amSan Antonio
9h 40m
1 stop
IAD9:17 pmWashington, D.C. Dulles Intl
$261
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 October 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

Fri 11/7

5:34 pm-6:32 pm

2 stops25h 58m

San Antonio

Mon 11/10

5:35 pm-12:11 am

1 stop5h 36m

$252

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Thu 11/13

5:34 pm-4:40 pm

1 stop24h 06m

San Antonio

Mon 11/17

8:25 pm-8:20 pm

2 stops22h 55m

$253

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Wed 12/10

2:16 pm-10:00 pm

2 stops8h 44m

San Antonio

Wed 12/17

6:00 am-4:14 pm

1 stop9h 14m

$255

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Fri 1/16

6:00 am-12:02 pm

1 stop7h 02m

San Antonio

Tue 1/20

10:37 am-9:17 pm

1 stop9h 40m

$257

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Fri 11/14

8:15 am-11:06 am

Nonstop3h 51m

San Antonio

Sun 11/16

5:13 pm-11:59 pm

1 stop5h 46m

$259

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Fri 1/16

5:30 am-2:05 pm

1 stop9h 35m

San Antonio

Sun 1/18

6:25 am-4:50 pm

1 stop9h 25m

$265

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Thu 11/13

7:21 pm-12:38 am

1 stop6h 17m

San Antonio

Mon 11/17

4:57 pm-12:16 am

1 stop6h 19m

$269

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Sun 11/23

5:05 am-11:00 am

1 stop6h 55m

San Antonio

Wed 11/26

12:10 pm-11:25 pm

1 stop10h 15m

$274

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Fri 1/16

5:50 pm-8:56 pm

Nonstop4h 06m

San Antonio

Mon 1/19

2:05 pm-9:17 pm

1 stop6h 12m

$277

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Fri 12/19

7:01 am-12:11 pm

1 stop6h 10m

San Antonio

Tue 1/6

6:30 am-1:55 pm

1 stop6h 25m

$303

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $506.

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 $316. 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 morning, with an average ticket price of $415. Departure times in the morning 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 $396 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 $309 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?

You could potentially save up to 52% on your flight if you consider stops on a Washington, D.C. Dulles Intl Airport to San Antonio flight.

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

As of October 2025, prices for Washington, D.C. Dulles Intl Airport to San Antonio flights are approximately 8% 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

$193

Fastest flight time

3h 50m

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 $193. 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 $328.
The fastest flight from Washington, D.C. Dulles Intl Airport to San Antonio takes 3h 50m
Direct flights go from Washington, D.C. Dulles Intl Airport to San Antonio every day.
There is 1 airport near San Antonio: 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 50m 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
4,236 reviews
Search Southwest flights
DeltaPriceFrom $242Free CancellationRating
7.9
7,982 reviews
Search Delta flights
United AirlinesPriceFrom $249Free CancellationRating
7.4
8,995 reviews
Search United Airlines flights
American AirlinesPriceFrom $268Free CancellationRating
7.2
11,032 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 7 times per week, with 8,995 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 $407 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.

An easier way to manage your San Antonio 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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 11/22
Sat 11/29
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States