SAT - IAD

$62 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 1/11. 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
$263
Overall average: $418
United Airlines
Thu 12/25Wed 12/31
SAT - IAD • Non-stop
Cheapest one-way
$62
Typical prices: $257-$469
Frontier
Sun 1/11
SAT - IAD • 1 stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
Security lines at SAT are exceptionally short.
The Silver Line Metro connects IAD to downtown D.C.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Delta
Cheapest • from $269 (round-trip)
Southwest
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 32% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 15% price drop
December
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

Thu, Dec 25 - Wed, Dec 31
United Airlines Logo
12:25 pm - 4:30 pm
SAT
-
IAD
3h 05mnonstop
United Airlines Logo
8:22 am - 11:23 am
IAD
-
SAT
4h 01mnonstop
$263United Airlines
Thu, Jan 15 - Mon, Jan 19
Delta Logo
4:00 pm - 11:06 pm
SAT
-
IAD
6h 06m1 stop
Delta Logo
7:30 pm - 12:38 am
IAD
-
SAT
6h 08m1 stop
$269Delta
Thu, Dec 25 - Wed, Dec 31
United Airlines Logo
5:59 pm - 11:49 pm
SAT
-
IAD
4h 50m1 stop
United Airlines Logo
5:25 pm - 8:24 pm
IAD
-
SAT
3h 59mnonstop
$273United Airlines
Sat, Feb 14 - Tue, Feb 17
United Airlines Logo
7:05 am - 11:19 am
SAT
-
IAD
3h 14mnonstop
United Airlines Logo
8:15 am - 11:11 am
IAD
-
SAT
3h 56mnonstop
$275United Airlines
Tue, Dec 23 - Tue, Jan 6
United Airlines Logo
12:25 pm - 4:30 pm
SAT
-
IAD
3h 05mnonstop
United Airlines Logo
5:50 pm - 8:56 pm
IAD
-
SAT
4h 06mnonstop
$279United Airlines
Thu, Dec 25 - Wed, Dec 31
United Airlines Logo
5:59 pm - 11:49 pm
SAT
-
IAD
4h 50m1 stop
United Airlines Logo
6:08 am - 1:16 pm
IAD
-
SAT
8h 08m1 stop
$283United Airlines
Wed, Dec 31 - Thu, Jan 1
United Airlines Logo
5:59 pm - 11:49 pm
SAT
-
IAD
4h 50m1 stop
United Airlines Logo
6:20 am - 1:12 pm
IAD
-
SAT
7h 52m1 stop
$284United Airlines
Sat, Feb 14 - Tue, Feb 17
United Airlines Logo
7:00 am - 4:05 pm
SAT
-
IAD
8h 05m1 stop
United Airlines Logo
8:15 am - 11:11 am
IAD
-
SAT
3h 56mnonstop
$285United Airlines
Tue, Dec 23 - Tue, Jan 13
United Airlines Logo
12:25 pm - 4:30 pm
SAT
-
IAD
3h 05mnonstop
United Airlines Logo
10:02 am - 4:53 pm
IAD
-
SAT
7h 51m1 stop
$289United Airlines
Fri, Apr 10 - Sun, Apr 12
Delta Logo
6:11 pm - 12:26 am
SAT
-
IAD
5h 15m1 stop
Delta Logo
6:00 am - 11:31 am
IAD
-
SAT
6h 31m1 stop
$294Delta
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.

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, Friday 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 Wednesday, with Sunday 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 February, where tickets cost $309 (return) on average. On the other hand, the most expensive months are March and December, where the average cost of round-trip tickets is $458 and $418 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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $398 on average.

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 4 weeks before departure, which saves you about 32% 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 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.
Airports
SAT

Security lines at SAT are exceptionally short. Even during busy times, waits rarely exceed 15 minutes, making it a stress-free departure point.

IAD

The Silver Line Metro connects IAD to downtown D.C. in about 50 minutes, offering a convenient and cost-effective transportation option.

Our travel experts
Brandon Schultz

Brandon Schultz

Expert on SAT

Brandon Schultz

Brandon Schultz

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.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on IAD

Stefanie Waldek

Stefanie Waldek

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.

Read more

Good to know

Low seasonFebruary
Cheapest flight$62
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly with an average 14% 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 3 days, the lowest price for a flight from San Antonio to Washington, D.C. Dulles Intl Airport was $62 for a one-way ticket and $263 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?

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

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

    The Boeing 737-900 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 Southwest?

    The two airlines most popular with KAYAK users for flights from San Antonio to Washington, D.C. are Delta and Southwest. With an average price for the route of $336 and an overall rating of 7.9, Delta is the most popular choice. Southwest is also a great choice for the route, with an average price of $278 and an overall rating of 7.9.

  • 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 $203 or less one-way and $368 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 4 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
SouthwestOverall score based on 4252 reviews
8.0Comfort
8.1Boarding
8.6Crew
7.5Entertainment
7.0Food
Airline reviews

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

8.0 ExcellentRussell, Dec 2025
SAN - OAK
Read more Southwest reviews

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

Airline travel is always too cramped to really be pleasant, but the cabin crew on this flight did a pretty good job of making up for it by putting on some music during boarding and sprinkling a few funny remarks into the safety briefing and announcements, and just generally being friendly and helpful. It definitely reminded me of why I prefer the in-flight experience on Southwest!

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

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

It was rough. The staff was unprofessional, the choice of on board drinks terrible, it was cramped in space at every airport, they always ran out of overhead bin space so they pressured people to check bags for free or we couldn’t leave on the plane— so I did check my bag to help, and they nearly lost my bag. My bag did not arrive on the luggage belt, another man on my flight and I had to waste our time going to the baggage office to search for our bags. I would only fly southwest again if it was my last choice. Also, my flights were consistently delayed over and over again— at one point they straight up told us we were waiting for the pilot to arrive.

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Had to get off plane from prior flight even though I had to reboard same plane to continue to my final destination.

Everything a cheap airline should be at normal airline rates.

Lady Pilot was perfect in every way wheels up to wheels down communication, professionalism, excellent on time departure and on time arrival, excellent communication! Fantastic job with Superb attitude!!

The food is terrible. The staff is wonderful. Comfort is good.

Left on time, a bit delayed due to headwinds most of the trip.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Good seats in Main cabin, excellent service and excellent landing

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

Very smooth, on-time, and pleasantly uneventful flight. The team at the gate and on board were professional and genuinely courteous. The pilot kept us well updated throughout, and both takeoff and landing were steady and enjoyable without any drama. Just a good, solid flight. Thank you! 💗

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

We had a lot of really rough weather but that was not Delta's fault. Pilot was amazing.

The food is terrible. The same pasta or chicken with bad taste and presentation

It was probably one of the worst flights I’ve been on. The restrooms were never cleaned or stocked. The food was very subpar, and i usually enjoy airline food, so I was disappointed. It was just all around a bad experience. The only saving grace was the flight attendants.

The only downside was my cell phone charger wouldn’t work in the charging port but everyone else’s would work in them all. My cell phone cable works fine in my hotel room in Frankfurt.

Great crew, excellent landing, good food. Over all great experience. Thank you!

One bag is incorrect and not acceptable for an international flight. The food was not just good. I won't fly with them again.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

Crew was dismissive. Snacks and refills not offered. Poor business class experience. Bed not comfortable compared to Emirates or BA.

Flight was delayed for 5 hours because crew didn’t have enough time to rest - this seems like it could have been avoided with better scheduling. Food was not good.

IAD with the archaic people movers is just a place to be avoided.

Overall, it was good. I was seating next to a wonderful lady and did not notice how time flew. Thanks

I got sick nothing contagious but distressing enough and the care I received on the flight was astounding.

Horrible. Both legs of my flight were delayed more than 6 hours. No compensation, no screens on the plane, and the plane was not clean.

After we'd boarded , they canceled the flight. The crew didn't even know , we just all received text messages. Then after they deplaned us , AA was just like "too bad, go F your self, we sure ain't gonna help you"

Initial flight was cancelled at the time of arrival to the airport, flight alternative requires switching from direct to flight with a layover, and the plane felt like it would split apart, it was so rattle-y.

Weather delay for 2.5 hours followed by half hour crew delay, did not have ginger ale, uncomfortable seats

It was nobody’s fault - but the plane came 4-hrs late and we were updated randomly in 20-30 mins increments which left us hostage to sit and wait expectantly. It was very long and got very late. Our plane didn’t land until nearly 1 am! Also the toilet wasn’t working. The hosts were nice enough but were clearly “about to pass out” as one told me. Lastly, there was no snack or even time for it. Just a bad experience overall.

The boarding crew was incredibly helpful getting me on an earlier flight

Great experience. Flight boarded easily. Departed early. Smooth flight. Great arrival in DC--almost no taxing! Almost direct to gate from runway. Crew was terrific. Same cookies and beverages in main cabin. I did not use the entertainment system on this flight.

Flight delayed on both ends - have a gate ready at DCA, don't make us sit for 30min after being late to take off as well.

AA can't control the weather. But the airplane was hot and stuffy while stuck on the runway with a broken entertainment system.

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

Information on your arrival and departure airports