Cheap Flights from Washington Dulles to San Antonio International

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Compare Washington Dulles to San Antonio International flight deals

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Flight deals from Washington Dulles to San Antonio International

Looking for a cheap last-minute deal or the best return flight from Washington Dulles Airport to San Antonio International Airport? If you want to travel next month, return fares start from $452. Find the lowest prices on one-way and return tickets right here.

San Antonio.$394 per passenger.Departing Tue, 29 Sep, returning Sat, 3 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Tue, 29 Sep, arriving in San Antonio International.Inbound indirect flight with Frontier Airlines, departs from San Antonio International on Sat, 3 Oct, arriving in Washington Dulles.Price includes taxes and charges.From $394, select.

San Antonio.$452 per passenger.Departing Sat, 10 Oct, returning Sat, 17 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Sat, 10 Oct, arriving in San Antonio International.Inbound indirect flight with Frontier Airlines, departs from San Antonio International on Sat, 17 Oct, arriving in Washington Dulles.Price includes taxes and charges.From $452, select.

San Antonio.$459 per passenger.Departing Fri, 25 Sep, returning Mon, 28 Sep.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Fri, 25 Sep, arriving in San Antonio International.Inbound indirect flight with Frontier Airlines, departs from San Antonio International on Mon, 28 Sep, arriving in Washington Dulles.Price includes taxes and charges.From $459, select.

San Antonio.$460 per passenger.Departing Wed, 4 Nov, returning Wed, 11 Nov.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Wed, 4 Nov, arriving in San Antonio International.Inbound direct flight with United departs from San Antonio International on Wed, 11 Nov, arriving in Washington Dulles.Price includes taxes and charges.From $460, select.

San Antonio.$460 per passenger.Departing Sat, 3 Oct, returning Mon, 5 Oct.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Sat, 3 Oct, arriving in San Antonio International.Inbound direct flight with United departs from San Antonio International on Mon, 5 Oct, arriving in Washington Dulles.Price includes taxes and charges.From $460, select.

San Antonio.$460 per passenger.Departing Tue, 29 Sep, returning Sat, 3 Oct.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Tue, 29 Sep, arriving in San Antonio International.Inbound direct flight with United departs from San Antonio International on Sat, 3 Oct, arriving in Washington Dulles.Price includes taxes and charges.From $460, select.

San Antonio.$460 per passenger.Departing Sat, 31 Oct, returning Wed, 4 Nov.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Sat, 31 Oct, arriving in San Antonio International.Inbound direct flight with United departs from San Antonio International on Wed, 4 Nov, arriving in Washington Dulles.Price includes taxes and charges.From $460, select.

San Antonio.$460 per passenger.Departing Sat, 9 Jan, returning Sat, 16 Jan.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Sat, 9 Jan, arriving in San Antonio International.Inbound direct flight with United departs from San Antonio International on Sat, 16 Jan, arriving in Washington Dulles.Price includes taxes and charges.From $460, select.

San Antonio.$461 per passenger.Departing Sat, 5 Dec, returning Mon, 7 Dec.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Sat, 5 Dec, arriving in San Antonio International.Inbound direct flight with United departs from San Antonio International on Mon, 7 Dec, arriving in Washington Dulles.Price includes taxes and charges.From $461, select.

San Antonio.$461 per passenger.Departing Thu, 26 Nov, returning Thu, 3 Dec.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Thu, 26 Nov, arriving in San Antonio International.Inbound direct flight with United departs from San Antonio International on Thu, 3 Dec, arriving in Washington Dulles.Price includes taxes and charges.From $461, select.

San Antonio.$580 per passenger.Departing Sat, 26 Sep, returning Mon, 28 Sep.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Sat, 26 Sep, arriving in San Antonio International.Inbound direct flight with United departs from San Antonio International on Mon, 28 Sep, arriving in Washington Dulles.Price includes taxes and charges.From $580, select.

San Antonio.$615 per passenger.Departing Tue, 9 Feb, returning Sun, 14 Feb.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Tue, 9 Feb, arriving in San Antonio International.Inbound direct flight with United departs from San Antonio International on Sun, 14 Feb, arriving in Washington Dulles.Price includes taxes and charges.From $615, select.

San Antonio.$615 per passenger.Departing Sat, 13 Mar, returning Mon, 15 Mar.Return flight with Delta.Outbound indirect flight with Delta, departs from Washington Dulles on Sat, 13 Mar, arriving in San Antonio International.Inbound indirect flight with Delta, departs from San Antonio International on Mon, 15 Mar, arriving in Washington Dulles.Price includes taxes and charges.From $615, select.

San Antonio.$618 per passenger.Departing Wed, 16 Jun, returning Mon, 21 Jun.Return flight with Delta.Outbound indirect flight with Delta, departs from Washington Dulles on Wed, 16 Jun, arriving in San Antonio International.Inbound indirect flight with Delta, departs from San Antonio International on Mon, 21 Jun, arriving in Washington Dulles.Price includes taxes and charges.From $618, select.

San Antonio.$685 per passenger.Departing Thu, 24 Dec, returning Sat, 9 Jan.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Thu, 24 Dec, arriving in San Antonio International.Inbound direct flight with United departs from San Antonio International on Sat, 9 Jan, arriving in Washington Dulles.Price includes taxes and charges.From $685, select.

San Antonio.$699 per passenger.Departing Fri, 9 Oct, returning Sun, 6 Dec.Return flight with Delta.Outbound indirect flight with Delta, departs from Washington Dulles on Fri, 9 Oct, arriving in San Antonio International.Inbound indirect flight with Delta, departs from San Antonio International on Sun, 6 Dec, arriving in Washington Dulles.Price includes taxes and charges.From $699, select.

Find the cheapest month to fly from Washington Dulles to San Antonio International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington Dulles to San Antonio International flights are currently cheapest in October.

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Direct flights from Washington Dulles to San Antonio International

Washington Dulles to San Antonio International: Alternative routes

Compare routes from Washington Dulles to San Antonio below. You may find an airport to fly into that's cheaper, faster, or easier than San Antonio International.

San Antonio International

13km from central San Antonio

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from $394

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Washington D.C. to San Antonio: Flight information

The things to know before you go.

Cheapest flight found	$394
Cheapest month to fly	September
Average flight time	3 hrs, 52 mins
Most popular airline	United
Average flights per week	46

Finding cheap flights from Washington Dulles to San Antonio International: Frequently asked questions

How much are return flights from Washington Dulles to San Antonio International?

The best price we found for a return flight from Washington Dulles to San Antonio International is $394. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from Washington Dulles to San Antonio International?

3 hours and 52 minutes is the average flight time from Washington Dulles to San Antonio International.

Which airlines fly direct from Washington Dulles to San Antonio International?

United, Air Canada and Lufthansa fly direct from Washington Dulles to San Antonio International.

How many flights are there a week from Washington Dulles to San Antonio International?

As of September 2026, there are 46 flights per week flying from Washington Dulles to San Antonio International.

When is the cheapest time to fly from Washington Dulles to San Antonio International?

The cheapest month to fly from Washington Dulles to San Antonio International is usually September.

Which upcoming date is cheapest to fly from Washington Dulles Airport to San Antonio International Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Washington Dulles Airport to San Antonio International Airport on Tuesday, 29 September 2026.

Can I get a direct flight from Washington Dulles Airport to San Antonio International Airport?

Yes – the average flight time is 3 hours and 52 minutes.

How can I find the best flight deal to San Antonio International?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Antonio International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to San Antonio?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Antonio is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from Washington Dulles Airport to San Antonio International with?

Currently, Frontier Airlines and United offer the cheapest flight tickets to San Antonio International.

Flying from Washington Dulles Airport (IAD) to San Antonio International Airport (SAT): what you need to know

Around 3 hours 45 minutes is how long you can expect to be in the air on a direct flight from Washington Dulles Airport to San Antonio International Airport.
San Antonio is one hour behind Washington DC and observes the UTC-6 timezone.
Every week, there are 14 Washington Dulles Airport to San Antonio International Airport flights. If you prefer to be on board early, select the 08:15 United Airlines flight. If you're eager to make the most of your time before flying, the last flight is at 17:55 with United Airlines.
To ensure you get on your IAD to SAT flight, leave enough time for things like check-in and baggage drop. Turning up two hours before international departures and an hour before domestic flights is the general travel rule.
Flying during a peak time like July? Major public holidays and other popular periods can result in longer lines and delays at airport checkpoints. Play things extra safe and get there up to four hours before an international flight and two hours before a domestic departure.
United is your gateway to exploring San Antonio (and perhaps some other exciting corners of the United States!). Check out the direct flights from Washington Dulles Airport to San Antonio International Airport offered by this popular airline.
The majority of passengers choose to fly with United on this route.
With an impressive 85.55% of services arriving as scheduled, United is the most punctual carrier for IAD to SAT flights.
Consider adding a stopover when booking your ticket from Washington Dulles Airport to San Antonio International Airport. Simply uncheck 'Direct flights only' to break up your journey, or perhaps see a new city along the way. Here's where you can stop between IAD and SAT:
- Atlanta Hartsfield-Jackson Airport
- Charlotte Douglas Airport
- St Louis Airport

How to find the cheapest flights from Washington Dulles Airport (IAD) to San Antonio International Airport (SAT)

The cheapest price we've seen for a one-way Washington Dulles Airport to San Antonio International Airport flight is $197. A round-trip ticket is currently $394. Depending on the availability when you book, these fares can change.
To find cheap tickets from IAD to SAT, book in advance. Airlines usually offer their best fares when flights are first made available.
Plan your trip for May. That's the cheapest month for flights from Washington Dulles Airport to San Antonio International Airport. If your travel dates are flexible, try out the 'Whole month' tool to see the cheapest airfare across every month.
Spend less time searching for cheap flights from IAD to SAT by setting up a Price Alert. You'll receive an email or notification through the app when a lower fare pops up.
Secure the ideal flight for you with the help of the filters. To see the 'Fastest,' 'Best' or 'Cheapest' flights from Washington Dulles Airport to San Antonio International Airport, use the 'Sort by' function. You can also filter by airline, departure and arrival times, and number of stops.

Handy information about Washington Dulles Airport (IAD)

You'll find IAD at 1 Saarinen Circle.
When it comes to Washington Dulles Airport's on-time performance, 77% of flights arrive within the expected timeframe.
Washington Dulles Airport is about 40 kilometres from central Washington DC. If you're ride-sharing, catching a taxi or driving from the centre, it'll take you 45 minutes or so to arrive, depending on the traffic.
You can expect a journey time of about 1 hour 10 minutes when using public transport.
Searching for a convenient hotel close to IAD? If you're boarding an early flight from Washington Dulles Airport to San Antonio International Airport, these stays will have you moments from your departure lounge:

Arriving at San Antonio International Airport (SAT)

The last thing you need is a lengthy trip to your hotel if you're getting in late on a Washington Dulles Airport to San Antonio International Airport flight. Stay at one of these accommodation options near SAT instead:
Go where the road takes you with a San Antonio International Airport rental car. Pick up your wheels from Fox - Rent A Car, Dollar or Thrifty and see more of San Antonio and beyond.
To get the lowest price, reserve your ride from San Antonio International Airport about one week before your trip.

When to fly to San Antonio International Airport (SAT)

July is the busiest month for flights from Washington Dulles Airport to San Antonio International Airport. To skip the crowds, travel to San Antonio in March.
Book your flight from Washington Dulles Airport to San Antonio International Airport for August if you want to visit San Antonio during its warmest month. Expect temperatures of between 24ºC and 40ºC.
For cooler conditions, look for a cheap ticket from IAD to SAT in January. Average temperatures are between 4ºC and 20ºC then.

Explore more of the United States

You've seen San Antonio, now it's time to explore other parts of the United States. Travel about 306 kilometres east to Houston to check off its must-visit sights. From The Museum of Fine Arts, Houston, Beck Building to Houston Museum of Natural Science and The Menil Collection, you've got a jam-packed schedule ahead.
Around 402 kilometres north-east of San Antonio, Dallas is another essential stop in the United States. Experience the best of this destination with a visit to Meyerson Symphony Centre, Winspear Opera House and Dallas Museum of Art.