IAD - SAT

$105 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 5/26. 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
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Everything you should know

Cheapest round-trip
$295
Typical prices: $387-$283
United Airlines
Tue 7/28Wed 8/12
IAD - SAT • Non-stop
Cheapest non-stop
$309
Typical prices: $481-$348
United Airlines
Fri 6/5Wed 6/10
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 $295 (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 3h 47m
Direct flights
Direct flights
+1
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Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $324 (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 4 weeks in advance save around 29% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 13% price drop
Most popular
Good to know
Good to know
+1
+1
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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

Tue, Jul 28 - Wed, Aug 12
United Airlines Logo
8:25 am - 10:59 am
IAD
-
SAT
3h 34mnonstop
United Airlines Logo
8:53 am - 5:54 pm
SAT
-
IAD
8h 01m
1 stop
$295United Airlines
Tue, May 26 - Fri, May 29
Multiple Airlines Logo
7:45 am - 6:59 pm
IAD
-
SAT
12h 14m
2 stops
Multiple Airlines Logo
5:26 pm - 7:50 pm
SAT
-
IAD
25h 24m
1 stop
$298Multiple Airlines
Tue, Jun 2 - Tue, Jun 9
United Airlines Logo
5:38 pm - 10:57 pm
IAD
-
SAT
6h 19m
1 stop
United Airlines Logo
7:00 am - 11:27 am
SAT
-
IAD
3h 27mnonstop
$299United Airlines
Sun, May 24 - Sun, May 31
Multiple Airlines Logo
5:30 pm - 4:16 pm
IAD
-
SAT
23h 46m
1 stop
Multiple Airlines Logo
5:26 pm - 11:09 pm
SAT
-
IAD
28h 43m
2 stops
$303Multiple Airlines
Tue, Jun 2 - Thu, Jun 4
Multiple Airlines Logo
7:45 am - 8:14 pm
IAD
-
SAT
13h 29m
2 stops
Multiple Airlines Logo
5:26 pm - 7:50 pm
SAT
-
IAD
25h 24m
1 stop
$304Multiple Airlines
Wed, Jul 29 - Wed, Aug 5
United Airlines Logo
8:25 am - 10:59 am
IAD
-
SAT
3h 34mnonstop
United Airlines Logo
12:01 pm - 4:28 pm
SAT
-
IAD
3h 27mnonstop
$309United Airlines
Sun, May 31 - Tue, Jun 9
Multiple Airlines Logo
5:30 pm - 4:16 pm
IAD
-
SAT
23h 46m
1 stop
Multiple Airlines Logo
7:51 pm - 10:22 am
SAT
-
IAD
13h 31m
2 stops
$312Multiple Airlines
Thu, May 21 - Wed, May 27
Frontier Logo
9:12 am - 8:14 pm
IAD
-
SAT
12h 02m
1 stop
Frontier Logo
8:59 pm - 8:12 am
SAT
-
IAD
10h 13m
1 stop
$314Frontier
Sat, Jun 6 - Sun, Jun 7
Frontier Logo
9:12 am - 8:14 pm
IAD
-
SAT
12h 02m
1 stop
Frontier Logo
8:59 pm - 8:12 am
SAT
-
IAD
10h 13m
1 stop
$315Frontier
Fri, Jun 5 - Sun, Jun 7
Frontier Logo
9:12 am - 8:14 pm
IAD
-
SAT
12h 02m
1 stop
Frontier Logo
8:59 pm - 8:12 am
SAT
-
IAD
10h 13m
1 stop
$316Frontier
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.

How much is a round-trip flight from Washington, D.C. Dulles Intl Airport to San Antonio?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Washington, D.C. Dulles Intl Airport to San Antonio departing in July.

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 Thursday, 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 Thursday 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 September, where tickets cost $333 (return) on average. On the other hand, the most expensive months are March and December, where the average cost of round-trip tickets is $436 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 4 weeks before departure, which saves you about 29% 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$105
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 4% 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 $105 for a one-way ticket and $295 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, Delta, and Alaska Airlines 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 737-700 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 $328 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 $339 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 $310 or less one-way and $371 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 4314 reviews
8.0Comfort
7.5Entertainment
7.0Food
8.6Crew
8.1Boarding
Airline reviews

Southwest is kind of a slum airline. It’s gotten more expensive over the years for less and less service. I am a Southwest Chase Visa card holder and was forced to choose a seat in the 26th row in the middle seat. However my wife who is a rewards member but doesn’t hold a card or anything else, gets randomly assigned a normally paid seat in row 6! How does that work?

4.0 OkayDavid, Apr 2026
COS - DAL
Read more Southwest reviews

Southwest is kind of a slum airline. It’s gotten more expensive over the years for less and less service. I am a Southwest Chase Visa card holder and was forced to choose a seat in the 26th row in the middle seat. However my wife who is a rewards member but doesn’t hold a card or anything else, gets randomly assigned a normally paid seat in row 6! How does that work?

The seat was not comfortable. 1D. My back was sore all night and the next day.

One of the best airlines for fast boarding, on time arrivals, and top notch service!

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

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

In ATL they have two sets of departure screens. Follow what is on your airline's departure board - the ATL Airport Authority departure board had completely incorrect details about the gate assignment for my flight, which would have made me miss boarding.

Flight was delayed it was hot while sitting on the plane, one engine was working on the plane until they had to do some jimmy rigging down the runway in order for the other engine to charge up. It was ridiculous

The flight was very good and the staff was very friendly and helpful!

The only thing I would say is we tried to get on a standby earlier flight, but with our fair we couldn’t. That seems senseless to leave with open seats..

Very easy to use and convenient, you can perform any action within the same portal

In a world of delays, Delta was on time both ways! Boarding was fast and efficient. Staff was friendly. AND wifi worked.

WiFi didn’t work. Flight delayed 3 hours Crew members were illiterate Seat lean back did not work.

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

This wasn't my experience with Delta. It was just the Pegasus flight. Seats were very hard. Staff was kinda rough. Not very nice. Charged me for snacks. For a 4 hour flight I would've expected more.

Vegetarian selection could be better. Bread was too hard to chew.

Crew was friendly and competent. Food, wine, and entertainment were excellent except the raw tuna on the flight to Split. Recommend against serving that - at least as the only option. Many medical conditions do not allow people to eat raw fish.

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

Good quick flight on a small but comfortable plane. I'm 6'3 and had plenty of space.

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.

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

Information on your arrival and departure airports