IAD - SAT

$101 Find Cheap Flights from Washington Dulles Airport to San Antonio

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to San Antonio departing on 5/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Antonio

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to San Antonio, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to San Antonio, as well as popular online travel agencies
Travelers love KAYAK
41.299.237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$260
Overall average: $399
Frontier
Sat 5/9Sun 5/10
IAD - SAT • 1 stop
Cheapest non-stop
$269
Typical prices: $324-$547
United Airlines
Tue 4/21Sat 4/25
IAD - SAT • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
For a smooth departure from IAD, use the AeroTrain.
Use the big red #5 VIA bus for easy access to downtown.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $260 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with United Airlines. Average duration is 4h 01m
Direct flights
Direct flights
+1
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Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $316 (round-trip)
Shortest trip • 5h 19m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 35% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 18% price drop
Most popular
Good to know
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Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Antonio!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Dulles Intl to San Antonio (IAD-SAT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to San Antonio that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Dulles Intl to San Antonio

Sat, May 9 - Sun, May 10
Frontier Logo
8:09 am - 5:59 pm
IAD
-
SAT
10h 50m
1 stop
Frontier Logo
3:14 pm - 8:56 am
SAT
-
IAD
16h 42m
2 stops
$260Frontier
Tue, Apr 21 - Fri, Apr 24
Multiple Airlines Logo
8:20 am - 3:53 pm
IAD
-
SAT
32h 33m
2 stops
Multiple Airlines Logo
2:12 pm - 7:27 am
SAT
-
IAD
16h 15m
1 stop
$261Multiple Airlines
Mon, Apr 6 - Wed, Apr 8
Multiple Airlines Logo
6:15 am - 5:05 pm
IAD
-
SAT
11h 50m
1 stop
Multiple Airlines Logo
10:22 am - 12:36 am
SAT
-
IAD
13h 14m
2 stops
$266Multiple Airlines
Sat, Apr 11 - Tue, Apr 14
Multiple Airlines Logo
8:30 pm - 12:27 pm
IAD
-
SAT
16h 57m
1 stop
Multiple Airlines Logo
10:22 am - 12:36 am
SAT
-
IAD
13h 14m
2 stops
$267Multiple Airlines
Sat, Apr 11 - Wed, Apr 15
Multiple Airlines Logo
8:30 pm - 12:27 pm
IAD
-
SAT
16h 57m
1 stop
Multiple Airlines Logo
4:49 pm - 8:56 am
SAT
-
IAD
15h 07m
2 stops
$268Multiple Airlines
Tue, Apr 21 - Sat, Apr 25
United Airlines Logo
8:15 am - 11:03 am
IAD
-
SAT
3h 48mnonstop
United Airlines Logo
7:15 am - 11:36 am
SAT
-
IAD
3h 21mnonstop
$269United Airlines
Mon, Apr 6 - Fri, Apr 10
Frontier Logo
6:15 am - 5:05 pm
IAD
-
SAT
11h 50m
1 stop
Frontier Logo
6:00 pm - 12:36 am
SAT
-
IAD
5h 36m
1 stop
$270Frontier
Fri, Apr 10 - Fri, Apr 17
Multiple Airlines Logo
8:30 pm - 12:27 pm
IAD
-
SAT
16h 57m
1 stop
Multiple Airlines Logo
10:23 am - 7:27 am
SAT
-
IAD
20h 04m
1 stop
$271Multiple Airlines
Mon, Apr 13 - Fri, Apr 17
Multiple Airlines Logo
8:30 pm - 12:27 pm
IAD
-
SAT
16h 57m
1 stop
Multiple Airlines Logo
3:00 pm - 9:54 am
SAT
-
IAD
17h 54m
2 stops
$273Multiple Airlines
Mon, Apr 13 - Tue, Apr 14
Multiple Airlines Logo
6:15 am - 5:05 pm
IAD
-
SAT
11h 50m
1 stop
Multiple Airlines Logo
10:22 am - 12:36 am
SAT
-
IAD
13h 14m
2 stops
$276Multiple Airlines
Booking Insights

KAYAK's insights & trends for Dulles Intl to San Antonio flights

Get data-powered insights and trends into flights from Dulles Intl to San Antonio to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Washington Dulles Airport to San Antonio?

The average price of all round-trip flights from Washington, D.C. Dulles Intl Airport to San Antonio clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to San Antonio on a Wednesday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Washington Dulles Airport to San Antonio. For your return ticket, we recommend flying on a Friday and avoiding Sundays for the best deals.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to San Antonio?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to San Antonio, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. Dulles Intl Airport to San Antonio is August, where tickets cost $314 (return) on average. On the other hand, the most expensive months are March and December, where the average cost of round-trip tickets is $444 and $433 respectively.

Can I save money by flying with a layover from Washington, D.C. Dulles Intl Airport to San Antonio?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $419, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to San Antonio?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to San Antonio, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Washington, D.C. Dulles Intl Airport to San Antonio, you should book around 5 weeks before departure, which saves you about 35% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Expert advice

Expert advice for your flight from Dulles Intl to San Antonio

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Brandon Schultz

Brandon Schultz

Expert on SAT

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Stefanie Waldek

Stefanie Waldek

Expert on IAD

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Good to know

Low seasonSeptember
Cheapest flight$101
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 13% increase in price.
Flight from Washington Dulles Airport to San Antonio

When to book flights from Dulles Intl to San Antonio

Are your dates flexible? Find out the best times to travel from Dulles Intl to San Antonio based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Washington Dulles Airport to San Antonio flights

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to San Antonio was $101 for a one-way ticket and $260 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and San Antonio?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from Washington Dulles Airport to San Antonio?

    Washington Dulles Airport and San Antonio are both served by 1 main airport. You will leave Washington Dulles Airport from Washington, D.C. Dulles Intl and will be arriving at San Antonio.

  • Which airlines offer Wi-Fi service onboard planes from Washington Dulles Airport to San Antonio?

    American Airlines, JetBlue, and Delta offer inflight Wi-Fi service on the Washington Dulles Airport to San Antonio flight route.

  • Which aircraft models fly most regularly from Washington Dulles Airport to San Antonio?

    The Boeing 737 MAX 9 is the aircraft model that flies most regularly on the Washington Dulles Airport to San Antonio flight route.

  • Which airline alliances offer flights from Washington Dulles Airport to San Antonio?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Washington Dulles Airport and San Antonio, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Washington Dulles Airport to San Antonio?

    There are nonstop flights from Washington Dulles Airport to San Antonio on a daily basis.

  • Which is the best airline for flights from Washington, D.C. to San Antonio, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to San Antonio are Southwest and Delta. With an average price for the route of $336 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $312 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to San Antonio?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington Dulles Airport to San Antonio.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to San Antonio?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Antonio from Washington Dulles Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington Dulles Airport to San Antonio?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Antonio with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and SAT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to San Antonio?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Antonio from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Washington, D.C. Dulles Intl Airport to San Antonio

  • Looking for a cheap flight? 25% of our users found flights on this route for $253 or less one-way and $348 or less round-trip.

Prefer to fly direct from Washington Dulles Airport to San Antonio?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Washington, D.C. Dulles Intl to San Antonio.
Find which airlines fly direct from Washington, D.C. Dulles Intl Airport to San Antonio Airport, which days they fly and book direct flights.

Direct departures

Washington, D.C. Dulles Intl to San Antonio

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Direct returns

San Antonio to Washington, D.C. Dulles Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Reviews of the top 3 airlines serving from Dulles Intl to San Antonio

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to San Antonio. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Dulles Intl to San Antonio? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4319 reviews
8.6Crew
8.0Comfort
8.1Boarding
7.0Food
7.5Entertainment
Airline reviews

I elected to pay for the upgrades and found very little difference

6.0 GoodChris, Mar 2026
DAL - SAT
Read more Southwest reviews

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

Snacks are always pretzels. Why can't you also offer peanuts ?

Flight was hours late, unable to sit next to spouse, I have had so much better experiences. Substantially better, only saving grace was that it was a short flight.

An entire day of delays. Cost lots of money. Meals and a hotel.

Only downside was the legroom and seat width, which is always a problem unless I spend more for a premium seat.

Great flight but super high price. Glad it was a business trip and not personal

On time. Friendly staff. Took to long to pre bord all the specialty groups. Cramped small plane

Haven’t flown on SW in years. Flight was on time departing and arriving. Served vegan butter onion flavored pretzels which were bad. Coke served was in a tiny paper cup. Crew was not engaging. Felt like they were going through the motions. Old plane, tight seats and no leg room.

No delays and arrived to destination 30 min early. Staff was super friendly.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Stop changing gates. Stop cancelling flights Stop moving my seat.

Extremely disappointed with Delta. They canceled flight last minute and then I rebooked the other flights and with which were delayed as well

Could not get my connecting flight boarding pass until four hrs before departure! Ver annoying especially since the staff could not explain why!

The flight was flying with 30% capacity. The flight my seat from preferred seating to back of the seat. Even though i can understand that this was to balance the flight weight. The flight attendance decided to do the serving near my seat and in the middle , their noices woke me up from sleep , when i realized that the service has ended and when they were going back asked for a coffee, for which they answered they have completed teh service in my location. That really upset me as they woke me up and also rejected the coffee i asked. I ended up landing with a headache, thanks to the crew that screwed up my travel

Delayed. Hot. Passenger next to me was so large I couldn’t move.

Same experience as the flight from Norfolk to Atlanta where people are boarded in zones that don't make sense. People behind you on the plane will get on before you and they take the luggage space on your row.

The boarding process doesn't make sense since some people that will sit behind your rows are boarded before you and then they take up the luggage space above your head. I then have to wait for people to get off the plane before I can go back to get my luggage.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

Ineffective communication with United resulted in lost baggage. Their Baggage Tracing counter at MUC was shut down from 11:00-14:15 on my arrival. Undertrained, underinformed staff had me Running all over MUC to find someone to help me to no avail. Staff was rude, unhelpful, and unable to effectively use the systems they did have operational. They refused to contact United in any way or provide any accommodation or other resources while I waited for my luggage. This has destroyed my downstream itinerary. If they had even the slightest visibility I may have been able to reschedule/plan, but again, their staff provided nothing, and did nothing more than their website, which doesn’t even work on a standard phone browser. Miserable failure at all levels that weren’t associated with the operation of the aircraft.

Sat next to a one year old. She crawled all over the place and made me laugh.

The Crew and the food was the worst I ever had in Business Class. First they told us there were no space for carry on. It was plenty of space over our 2 row seats, we had to ask to let us travel with it which was accepted. They were aware that we had to run for the connection due to the previous flight delay. Have us one hour waiting for more customers and not even offer a glass of water. Then started the service and they started to serve other passengers drinks in business and did not offer any drinks until they serve our pre ordered meal and I ask for something to drink. I had to wait until they finished to serve all passengers until Inget something. The crew was the worts I ever had for Business Class in my life.

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Everything you need to know for your flight from Dulles Intl to San Antonio

Information on your arrival and departure airports