SAT - IAD

$95 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 8/30. 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

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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Flights 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, Aug 20 - Sat, Aug 30
United Airlines Logo
12:00 pm - 4:20 pmSAT-IAD
3h 20mnonstop
United Airlines Logo
5:55 pm - 8:33 pmIAD-SAT
3h 38mnonstop
$210United Airlines
Find Deal
Sat, Aug 30 - Mon, Sep 1
United Airlines Logo
7:00 am - 11:19 amSAT-IAD
3h 19mnonstop
United Airlines Logo
5:55 pm - 8:33 pmIAD-SAT
3h 38mnonstop
$219United Airlines
Find Deal
Wed, Aug 20 - Sat, Aug 30
United Airlines Logo
12:00 pm - 4:20 pmSAT-IAD
3h 20mnonstop
United Airlines Logo
2:39 pm - 8:46 pmIAD-SAT
7h 07m1 stop
$220United Airlines
Find Deal
Tue, Aug 12 - Sun, Aug 17
Frontier Logo
3:06 pm - 6:34 amSAT-IAD
14h 28m1 stop
Frontier Logo
7:46 pm - 8:05 amIAD-SAT
13h 19m1 stop
$228Frontier
Find Deal
Fri, Oct 10 - Mon, Oct 13
Frontier Logo
5:35 pm - 12:06 amSAT-IAD
5h 31m1 stop
Frontier Logo
6:00 am - 4:40 pmIAD-SAT
11h 40m1 stop
$238Frontier
Find Deal
Sat, Aug 23 - Sat, Aug 30
Delta Logo
5:10 am - 11:32 amSAT-IAD
5h 22m1 stop
Delta Logo
5:25 pm - 11:57 pmIAD-SAT
7h 32m1 stop
$244Delta
Find Deal
Sat, Sep 13 - Sat, Sep 20
Delta Logo
3:00 pm - 11:17 pmSAT-IAD
7h 17m1 stop
Delta Logo
9:00 am - 1:55 pmIAD-SAT
5h 55m1 stop
$251Delta
Find Deal
Fri, Sep 12 - Tue, Sep 16
Southwest Logo
5:35 am - 6:15 pmSAT-IAD
11h 40m2 stops
Southwest Logo
2:25 pm - 10:00 pmIAD-SAT
8h 35m1 stop
$300Southwest
Find Deal
Wed, Aug 20 - Sat, Aug 30
American Airlines Logo
6:00 am - 3:19 pmSAT-IAD
8h 19m2 stops
American Airlines Logo
6:27 am - 5:41 pmIAD-SAT
12h 14m1 stop
$301American Airlines
Find Deal
Fri, Sep 5 - Sun, Sep 7
American Airlines Logo
5:00 am - 1:51 pmSAT-IAD
7h 51m2 stops
American Airlines Logo
6:00 pm - 10:44 pmIAD-SAT
5h 44m1 stop
$314American Airlines
Find Deal
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
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 $463 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 $640 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 28% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$95
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly and prices are also 3% lower on average.
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 $95 for a one-way ticket and $210 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, SWISS, United Airlines, JetBlue, Lufthansa, KLM, 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?

    Star Alliance is the only airline alliance operating flights between San Antonio and Washington Dulles Airport.

  • 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 $339 and an overall rating of 8.0, Delta is the most popular choice. Southwest is also a great choice for the route, with an average price of $353 and an overall rating of 8.0.

  • 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 $218 or less one-way and $447 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

Air Canada, Brussels Airlines, Lufthansa, +1 more

Air Canada, Brussels Airlines, +2 more

Tuesday

Air Canada, Brussels Airlines, Lufthansa, +1 more

Air Canada, Brussels Airlines, +2 more

Wednesday

Air Canada, Brussels Airlines, Lufthansa, +1 more

Air Canada, Brussels Airlines, +2 more

Thursday

Air Canada, Brussels Airlines, Lufthansa, +1 more

Air Canada, Brussels Airlines, +2 more

Friday

Air Canada, Brussels Airlines, Lufthansa, +1 more

Air Canada, Brussels Airlines, +2 more

Saturday

Air Canada, Brussels Airlines, Lufthansa, +1 more

Air Canada, Brussels Airlines, +2 more

Sunday

Air Canada, Brussels Airlines, Lufthansa, +1 more

Air Canada, Brussels Airlines, +2 more

See more direct flights

Direct returns

Washington, D.C. Dulles Intl to San Antonio

Monday

Air Canada, Brussels Airlines, Lufthansa, +1 more

Air Canada, Brussels Airlines, +2 more

Tuesday

Air Canada, Brussels Airlines, Lufthansa, +1 more

Air Canada, Brussels Airlines, +2 more

Wednesday

Air Canada, Brussels Airlines, Lufthansa, +1 more

Air Canada, Brussels Airlines, +2 more

Thursday

Air Canada, Brussels Airlines, Lufthansa, +1 more

Air Canada, Brussels Airlines, +2 more

Friday

Air Canada, Brussels Airlines, Lufthansa, +1 more

Air Canada, Brussels Airlines, +2 more

Saturday

Air Canada, Brussels Airlines, Lufthansa, +1 more

Air Canada, Brussels Airlines, +2 more

Sunday

Air Canada, Brussels Airlines, Lufthansa, +1 more

Air Canada, Brussels Airlines, +2 more

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
8.1Boarding
8.6Crew
7.5Entertainment
7.0Food
Airline reviews

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.

2.0 MediocreAnonymous, Jul 2025AUS - RDU
Read more Southwest reviews

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.

The quality of Southwest Airlines continues to degrade each time I fly with them. If it were not for the free luggage, I would probably choose another airline. Their prices are a little bit competitive, but way too high for the quality of the service. Southwest is not unique in this way. Domestic flight in the United States of America has continued to be a lower and lower quality product. Very sad when you compare the quality of domestic airlines to that of many international airlines around the world.

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

WiFi did not work. For as outrageous as these flights cost, when they’re advertised with certain services/ features they should be in working order

Worst experience I had on Southwest. Still better than most, but the seating was barely tolerable.

The Southwest employees (all two of them) were very nice and cheerful despite the fact the line to self-check a bag (simply drop it off) was hundreds of people long. Thank God I arrived early to the airport because I stood in this line for at least an hour. Once on the flight that had been delayed by an hour, we had no Wi-Fi and thus no entertainment. Finally, I hope the investor strong arm tactics against Southwest pay off in a short-term windfall to your C-Suite because the rest of you are screwed. I have been a faithful Southwest customer for 15 years due to everything you just got rid of. I'm flying to Idaho and Washington in October, both places I used to simply book with Southwest without a second thought now with Frontier (Washington) and United (Idaho) because they offer everything the "new" Southwest does but cheaper and at better times, destinations, etc. This really makes me sad...

It was okay. The plane was delayed from earlier in the day, but they kept updating the departure time, sometimes later, sometimes earlier. That was stressful. Once we finally got on and took off, it was fine. I was supposed to have a connection in Chicago to Los Angeles, and the time for so late I was rebooked to arrive in LA 3 hours late. The departure time to Chicago later became early enough to have taken my original connection and arrive earlier but that wasn't an option.

It was one and half hour late... Not sure if any other experience matters.

Flight crew and cabin crew were great. I had to rearrange flights because my original flight was 3hrs delayed for weather, the rub is the flight I moved to boarded on time then we sat at the gate for 2 hours because scheduling stole our first officer for another flight, TWICE. Then our actual FO was an hour delayed. To make it worse my original flight went from a 3 hour delay to departing 15min EARLY. Just poor scheduling operations all around.

Bring back peanuts Take our drink orders when were all seated, especially after you switch to assigned seating.

Delayed and took off even later than the scheduled delay time

For a 69 year old with health problems I had the worse experience, no wheelchair when I entered a lady told me to sit and wait while a gentleman told me I had to walk to the Delta station, which I did. I had a carry on and a bag, and I was traveling with my service dog, which was on his carrier and the lady charged me for my carry on luggage, beside all the waiting cause of the delay, I had to walk to get my luggage cause no wheelchair showed up, I am so disappointed. I will get in touch with the company. I got home at 3:00 am, not good for my health situation.

Great experience on Delta. Staff from baggage check to flight attendants were very courteous and professional. My only issue was a personal preference for pretzels instead of the chips and cookies that were offered.

There was no problems, just a little uncomfortable with seats that do not lay back a little

Always good but we must do something about people in rows ahead of you that don't put their seats back up when they are suppose to. And It's rough to not be able to even lean over to get something out of my purse.

Flight was delayed, 30+ bags had to be gate checked. Crew were very friendly!

Everything was good until we were boarding our connection flight in Atlanta, we were told to gate check our carry-on, but when we got inside the plane, there was plenty of room in the overhead.

Did not know my son and I had different seating arrangements. He was fine, but it was disappointing.

Flight was canceled, and no effort was made to help with rebooking, no hotel vouchers, no car transportation and minimal food voucher and most places for food were closed by the time the voucher was given. Waited for 3 hours for bags. Simply the worst travel experience I have ever had

Food was surprisingly good but the WiFi was not great

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

United airlines, mediocre at best. No issues , nothing great . Worked for me

Turbulent taking off & landing to Dulles from Raleigh. Flight from Dulles to Tokyo very good!!

Very nice and clean plane. Transit time between flights was tight though

Mostly the experience was good except for the flight changes made by UA which meant longer layover in DC

Terrible. First of all we were delayed 4 3/4 hours departing Honolulu. As we had to leave our condo and the rental car had to be returned we had to go to the airport. Even though we had a business class boarding pass to Washington, since we did not have business class to Montreal we could not access the lounge without paying a $59 fee each. This does not make sense to us. Since we could not meet our original connection United booked us to Montreal via New York LaGuardia on Air Canada. In Washington a further delay got us into LaGuardia too late to make our connection to Montreal so we were booked on another Air Canada flight 3 hours later. We were originally scheduled to arrive in Montreal at 10:40 and arrived at 19:55. A totally exhausting day, United did not offer a meal voucher or any type of compensation. Air Canada did give us a digital meal voucher. The food in United business class is poor among all meals offered. The pods look nice but are not that confortable. Overall would not fly on United again.

Change cabin crew assisting business class. Not taking care, ignoring requests and calls. Never had such an experience in business class.

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.

It was good. It’s been a long time since my wife and I fly any where and things have changed. Our trip was to see our new grandson. We fly economy and that was not good for my bad back. It was a quick flight but uncomfortable.

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

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