SAT - IAD

$65 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 11/17. 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
$249
Overall average: $394
United Airlines
Tue 11/25Fri 11/28
SAT - IAD • Non-stop
Cheapest one-way
$65
Typical prices: $259-$440
Frontier
Mon 11/17
SAT - IAD • 1 stop
Our travelers' advice
AI-generated summary based on content written by travel experts
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
United Airlines
Cheapest • from $249 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 25% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 16% price drop
November
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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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

Tue, Nov 25 - Fri, Nov 28
United Airlines Logo
12:12 pm - 4:23 pmSAT-IAD
3h 11mnonstop
United Airlines Logo
8:15 am - 11:06 amIAD-SAT
3h 51mnonstop
$249United Airlines
Find Deal
Thu, Nov 13 - Mon, Nov 17
Multiple Airlines Logo
7:37 pm - 4:34 pmSAT-IAD
19h 57m2 stops
Multiple Airlines Logo
8:37 pm - 10:03 amIAD-SAT
14h 26m1 stop
$254Multiple Airlines
Find Deal
Thu, Nov 20 - Wed, Nov 26
Multiple Airlines Logo
7:38 pm - 7:50 amSAT-IAD
11h 12m1 stop
Multiple Airlines Logo
8:44 am - 7:21 pmIAD-SAT
11h 37m1 stop
$255Multiple Airlines
Find Deal
Fri, Dec 5 - Sun, Dec 7
Southwest Logo
6:00 am - 5:05 pmSAT-IAD
10h 05m1 stop
Southwest Logo
5:05 am - 11:00 amIAD-SAT
6h 55m1 stop
$269Southwest
Find Deal
Wed, Nov 12 - Thu, Dec 4
Delta Logo
11:35 am - 5:16 pmSAT-IAD
4h 41m1 stop
Delta Logo
11:06 am - 4:04 pmIAD-SAT
5h 58m1 stop
$278Delta
Find Deal
Mon, Nov 10 - Sun, Nov 23
Frontier Logo
5:35 pm - 12:11 amSAT-IAD
5h 36m1 stop
Frontier Logo
8:44 am - 6:44 pmIAD-SAT
11h 00m1 stop
$284Frontier
Find Deal
Thu, Nov 27 - Thu, Dec 4
Frontier Logo
7:00 am - 11:59 pmSAT-IAD
15h 59m2 stops
Frontier Logo
7:18 pm - 4:51 pmIAD-SAT
22h 33m1 stop
$290Frontier
Find Deal
Tue, Nov 18 - Tue, Dec 2
Delta Logo
5:15 am - 11:39 amSAT-IAD
5h 24m1 stop
Delta Logo
6:00 am - 10:31 amIAD-SAT
5h 31m1 stop
$303Delta
Find Deal
Fri, Nov 14 - Sun, Nov 16
American Airlines Logo
1:41 pm - 11:07 pmSAT-IAD
8h 26m2 stops
American Airlines Logo
6:24 am - 11:08 amIAD-SAT
5h 44m1 stop
$314American Airlines
Find Deal
Sun, Dec 7 - Tue, Dec 9
American Airlines Logo
7:00 am - 4:08 pmSAT-IAD
8h 08m1 stop
American Airlines Logo
2:16 pm - 10:00 pmIAD-SAT
8h 44m2 stops
$322American Airlines
Find Deal
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 $466 and $424 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 $363 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 3 weeks before departure, which saves you about 25% 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

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
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.

Read more about SATby Brandon Schultz
IAD

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

Read more about IADby Stefanie Waldek
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$65
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly with an average 6% 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 $65 for a one-way ticket and $249 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, United Airlines, SWISS, Lufthansa, JetBlue, Delta, 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., Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from San Antonio to Washington, D.C. are Southwest and Delta. With an average price for the route of $353 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 $322 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 $253 or less one-way and $363 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.
8.0
SouthwestOverall score based on 4241 reviews
8.0Comfort
7.5Entertainment
7.0Food
8.1Boarding
8.6Crew
Airline reviews

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

8.0 ExcellentGreg, Oct 2025OAK - BUR
Read more Southwest reviews

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Full cans of soda would be nice. A choice between two snacks would be appreciated.

Tried watching free movie and it kept freezing so I couldn’t finish.

All was good. I just had a hard time getting connected to the WiFi/internet during the flight

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

Great flight. Outstanding Service. Southwest was able to put us on a direct flight to Denver when the connection could have been affected by a later arrival to Baltimore. The direct flight was less expensive that the flight with the connection in Baltimore.

Delays delays delays. Late taking off, late landing, wait for a gate, etc.

Boarded on time but once we were ready for take off, the crew determined that, although every seat was taken, somehow someone was on the wrong flight. Delay, delay delay, announcements and ended up with one person checking EVERY ID against their passenger Manifest only to figure out it was a "clerical error." We departed 54 minutes late causing me to run in the St. Louis Airport to make my connection and lose the priority boarding spot I had paid for. Unnecessary delay.

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

Flight was crowded and the woman sitting on my left was large & kept crouching in to my space. You need bigger seats or smaller passengers to fit into the seats you DO have! Snack were OK. Would appreciate if airlines had more savory rather than sweet snacks, thank you!

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

We were delayed, which I think had to do with air traffic control. Otherwise, everything was great.

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

This is the best united airlines flight that I took. The crew was very friendly and the food was tasty!

It is clear that someone knew, and competent, is in charge of food at United Airlines at least for the international flights. I was flying in coach, but the choices of the dinner were excellent. Tasty, and appropriate size. I had the beef, which was a little bit like a shepherds pie, and it was good. Nothing comparable has been served on a United flight in years. It will not be confused with three star food, but it is very good for airline food. Even better was the breakfast choice between a cinnamon roll and a breakfast sandwich. I chose the breakfast sandwich which was absolutely delicious and which I would happily order again at my local Starbucks or Panera. It is clear that someone knew indifferent is in charge of the food and it’s about time.

Had one staff that was not pleasant. Seems they are stressed with too many people to care for.

I would have liked an opportunity to move to a different seat ( even would have checked in my hand luggage)as I had health issues where I didn't have to clamber over the passenger next to me to for toilet use/ movement [ She was a highly unpleasant neighbor to sit next to]. In addition, I found that my European phone plan had run out of data and so I was not receiving emails from yourselves on airport wifi to be able to check in online and verifications difficult as did not accept the ticket number I had. I asked for an extra blanket but was told there was none. Then I saw other passengers receiving them. I couldn't eat the food and asked for snacks : Stewardess said " on the way" but they did not bring. The best bit was the check in process in Lisbon. Very efficient. However, I did not understand why we had to collect our bags at Washington then go through customs again. It was not explained. I also with my leg and health issue had approximately mile walk to the gate ( which then changed) . There appeared to be no moving walkways or help provided.

The attendant were friendly. I suggest you have a medical attendant on board every flight so that in case someone is sick , he/she will help them.

We had a very long diversion and our food voucher didn’t work because the restaurants were closed

Flight was delayed leaving Dallas. Arrived about 2 hours later than scheduled.

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.

very bare bones flight no entertainment screen, download shows prior to boarding to watch on phone or tablet.

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

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