SAT - IAD

$125 Find Cheap Flights from San Antonio to Washington Dulles Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Antonio to Dulles Intl departing on 7/24. 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 Washington, D.C. Dulles Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Antonio to Washington, D.C., 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 San Antonio to Washington, D.C., as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$318
Typical prices: $446-$308
Frontier
Wed 7/8Sun 7/12
SAT - IAD • 1 stop
Cheapest non-stop
$334
Typical prices: $414-$309
United Airlines
Thu 8/13Sun 8/16
SAT - IAD • Non-stop
Top airlines
Cheapest • from $318 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with United Airlines. Average duration is 3h 31m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $185 (round-trip)
Shortest trip • 4h 50m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 6 weeks in advance save around 28% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 12% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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 Dulles Intl!
Flight Deals
Booking Insights
Expert advice
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Antonio to Dulles Intl 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 San Antonio to Dulles Intl

Wed, Jul 8 - Sun, Jul 12
Frontier Logo
9:32 pm - 8:20 am
SAT
-
IAD
9h 48m
1 stop
Frontier Logo
1:32 pm - 8:56 am
IAD
-
SAT
20h 24m
1 stop
$318Frontier
Fri, Jul 10 - Tue, Jul 14
Delta Logo
6:16 pm - 12:41 am
SAT
-
IAD
5h 25m
1 stop
Delta Logo
5:26 pm - 10:22 pm
IAD
-
SAT
5h 56m
1 stop
$319Delta
Mon, Aug 10 - Wed, Aug 12
Frontier Logo
9:51 am - 6:33 pm
SAT
-
IAD
7h 42m
1 stop
Frontier Logo
9:50 am - 8:37 pm
IAD
-
SAT
11h 47m
1 stop
$324Frontier
Sat, Aug 8 - Mon, Sep 14
Delta Logo
5:20 am - 1:43 pm
SAT
-
IAD
7h 23m
1 stop
Delta Logo
12:31 pm - 6:38 pm
IAD
-
SAT
7h 07m
1 stop
$329Delta
Fri, Jul 10 - Sun, Jul 12
Frontier Logo
9:51 am - 12:26 pm
SAT
-
IAD
25h 35m
1 stop
Frontier Logo
1:32 pm - 8:56 am
IAD
-
SAT
20h 24m
1 stop
$330Frontier
Thu, Aug 13 - Sun, Aug 16
United Airlines Logo
12:10 pm - 4:30 pm
SAT
-
IAD
3h 20mnonstop
United Airlines Logo
8:25 am - 11:00 am
IAD
-
SAT
3h 35mnonstop
$334United Airlines
Wed, Jul 8 - Sun, Jul 12
United Airlines Logo
5:57 pm - 12:31 am
SAT
-
IAD
5h 34m
1 stop
United Airlines Logo
8:20 am - 10:54 am
IAD
-
SAT
3h 34mnonstop
$335United Airlines
Mon, Jun 29 - Sat, Jul 4
Frontier Logo
8:56 pm - 8:25 am
SAT
-
IAD
10h 29m
1 stop
Frontier Logo
9:35 am - 8:11 pm
IAD
-
SAT
11h 36m
1 stop
$336Frontier
Fri, Jul 31 - Sun, Aug 9
United Airlines Logo
7:00 am - 11:27 am
SAT
-
IAD
3h 27mnonstop
United Airlines Logo
8:20 am - 10:54 am
IAD
-
SAT
3h 34mnonstop
$337United Airlines
Fri, Aug 7 - Tue, Aug 11
Multiple Airlines Logo
11:30 am - 7:38 pm
SAT
-
IAD
31h 08m
2 stops
Multiple Airlines Logo
9:50 am - 8:37 pm
IAD
-
SAT
11h 47m
1 stop
$338Multiple Airlines
Booking Insights

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

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

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

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

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

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

For San Antonio to Washington Dulles Airport, Thursday is the cheapest day to fly on average and Monday is the most expensive. Flying from Washington Dulles Airport back to San Antonio, the best deals are generally found on Thursday, with Monday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Antonio to Washington, D.C. Dulles Intl Airport, 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 San Antonio to Washington, D.C. Dulles Intl Airport is April, where tickets cost $326 (return) on average. On the other hand, the most expensive months are December and May, where the average cost of round-trip tickets is $419 and $413 respectively.

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

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 $424, prices are generally cheapest when you fly direct.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Antonio to Washington, D.C. Dulles Intl Airport, 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 San Antonio to Washington, D.C. Dulles Intl Airport, you should book around 6 weeks before departure, which saves you about 28% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.

Expert advice

Expert advice for your flight from San Antonio to Dulles Intl

 
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 seasonFebruary
Cheapest flight$125
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly with an average 13% increase in price.
Flight from San Antonio to Washington Dulles Airport

When to book flights from San Antonio to Dulles Intl

Are your dates flexible? Find out the best times to travel from San Antonio to Dulles Intl 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 San Antonio to Washington Dulles Airport flights

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

    In the last 5 days, the lowest price for a flight from San Antonio to Washington, D.C. Dulles Intl Airport was $125 for a one-way ticket and $318 for a round-trip.

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

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

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

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

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

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the San Antonio to Washington Dulles Airport flight route.

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from San Antonio to Washington, D.C. are Delta and United Airlines. With an average price for the route of $469 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $381 and an overall rating of 7.4.

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

    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 San Antonio to Washington Dulles Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from San Antonio 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 San Antonio to Washington Dulles Airport?

    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 Washington Dulles Airport with an airline and back to San Antonio with another airline. Booking your flights between San Antonio and IAD 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 San Antonio to Washington Dulles Airport?

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

  • Looking for a cheap flight? 25% of our users found flights on this route for $270 or less one-way and $457 or less round-trip.

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

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

Direct departures

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

Direct returns

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

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

 
See real verified KAYAK customer reviews for airlines flying from San Antonio to Washington, D.C.. 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 San Antonio to Dulles Intl? 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.
7.9
DeltaOverall score based on 8404 reviews
8.1Boarding
8.5Crew
7.8Entertainment
7.8Comfort
7.2Food
Airline reviews

I have Precheck. Flew HPN to DEN and return this past weekend. Delta didn't attach my Precheck number to this trip. So it was waiting in general line especially in Denver. Unavailable.

4.0 OkayMarilyn, Jun 2026
DEN - ATL
Read more Delta reviews

I have Precheck. Flew HPN to DEN and return this past weekend. Delta didn't attach my Precheck number to this trip. So it was waiting in general line especially in Denver. Unavailable.

Original flight was delayed, then cancelled and the gate staff did not expedite rebooking. Also, no instructions were given that a ticket number was needed before being called to facilitate rebooking. This could have been much more organized.

Be on time? When not on time a circling for over an hour offer more than 1 bag of chips to the passengers? It was a 7 hour flight by the time we got done.

Five hour delays every hour, I wish it were all at once

Flight delayed four separate times. I’m now one hour hours late to landing.

worst flight ever from Delta, it got delayed and kept on delaying..

Should never have had to go to Detroit from Orlando back to Tennessee!

Got rerouted from a straight flight from Orlando to Atlanta to Knoxville to a flight from Orlando to Detroit to Knoxville! Seriously!! Flight delay out of Detroit! Long day for what should have been a pretty easy travel day!

Two delays on two separate planes with parts they could not easily find and replace.

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

Our flight was delayed 2.5 hours from Lisbon to DC so we missed our connection to Seattle that would have arrived at about 9 PM. The agent initially said we had to stay overnight in DC and there were no other options to put us on to get us to Seattle. While on board I discovered a flight via American he could have put us in but by the time we arrived in DC that was sold out. We were then put on a flight to San Francisco that was also delayed then arrived in San Francisco and our flight to Seattle was also delayed so we ended up not arriving until 2:15 am. Our son could not pick us up so we ended up having to pay over $100 to Uber home. This is the second trip with United that the flight has been delayed causing us to miss an evening in Las Vegas and we were given nothing.

MY FAMILY'S LUGGAGE WAS LOST FROM ROME TO BARI. I WAS THE ONLY ONE THAT RECEIVED MY LUGGAGE FROM ROME TO BARI. AFTER DEPLANING IN BARI, WE WASTED A LOT OF TIME AT BAG CLAIMS LOST AND FOUND REPORTING THE CLAIM AND PLEADING FOR THE BAGS TO BE DELIVERED THE NEXT DAY. WE WERE TOLD THAT IT TAKES 3 DAYS MINIMUM TO DELIVER. MY DAUGHTER AND MY GIRLFRIEND NEEDED THEIR PERSONAL THINGS AND WE WERE STAYING 3 HOURS AWAY FROM THE BARI AIRPORT. WE HAD TO DRIVE 3 HOURS TO THE AIRPORT TO COLLECT OUR LOST LUGGAGE THE NEXT DAY. WE ARE NOT HAPPY WITH THE EXPERIENCE

There were no facilities in the middle of the aircraft and premium economy was not allowed to use the business class facilities, and had to share the only two toilets at the back with economy. The upgrade to Premium was definitely not worth it

Our flight to Rome, Italy was cancelled the day of and we were never informed. We only found out because I was trying to get into my husbands account and called to get his account number. Had to pay more for worse seating on another airline.

The economy seat was much less comfortable for an international flight in terms of recline and moving space when food tray is expanded. Per entertainment, it would be amazing if I could connect my Bluetooth headset or ear phones to the entertainment screen. Or provide in-flight wifi to connect directly from my own device.

We were a little disappointed to not be able to complete check in online without uploading pics of passports. Also we have KTN's and they weren't on our boarding passes when we got to security. Had to trek back to counter to have them fix.

Excellent service in Polaris class IAD to ZRH. Arrived rested and well fed after the overnight flight.

It's a short hop. My carryon was checked at the gate, I didn't have to drag it all over the airport. Excellent wheelchair assist.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

Terrific in every way. On time, professional staff, multiple movie options to select, great food and drink.

The airplane was an old model, the overhead didn’t have enough room for people’s items and made boarding and boarding disappointing and stressful. Crew allowed passengers to bring more than the permitted baggage sizes.

It was great. Smooth flight, comfortable, left on time and landed on time.

Horrible experience upon landing. Probably more due to DCA utter incompetence than AA.

Easy boarding. Rows are smaller but that may be an older and bigger me now :)

Flight has been delayed every time I've ever taken it. Seats uncomfortable. Children behind me yelling the entire flight. Some of this is out of their control but overall just consistently not a great experience.

Poor communication ahead of time about flight delays and old planes/other equipment.

Never going to fly your airline again if it can be avoided.

Not to have gotten delayed by 2+ hours for the fourth straight American flight. They're the worst.

Other than nearly three hour delay for maintenance issues, everything went smooth

Snow delayed boarding several times, which I understand happens. Issue I had was that after we did board, pilot told us we were going to roll out to be de-iced, then on our way. We were de-iced once, taxied to the tarmac and then stopped. Sat for another 30 minutes or so, the another de-icing. Then we rolled out to a parking spot, only to sit for another hour due to a traffic stop in DCA, which I'm confident they knew would happen before we boarded. Pilot gave no updates other than we had to hold, attendants did speak to the crew, but when asked, said the pilot would be updating us. We on the ground in the plane waiting for over 2 hours. They did communicate that bathrooms would be open, but no other news until we left. Would have been better to be up front about status.

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

Information on your arrival and departure airports