$66 Cheap Flights from Washington (IAD) to San Antonio (SAT)

View $66 flight on Thu, Nov 20, 2025Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to San Antonio International Airport (SAT)

Cheap Flights from Washington to San Antonio (IAD-SAT)

Prices were available within the past 7 days and start at $66 for one-way flights and $147 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Fri, Jan 9 - Thu, Jan 15
IAD
Washington
SAT
San Antonio
$147 Roundtrip, found 2 days ago
$147
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Fri, Jan 9 from Washington to San Antonio, returning Thu, Jan 15, priced at $147 found 2 days ago
Frontier Airlines
Fri, Jan 9 - Sun, Jan 11
IAD
Washington
SAT
San Antonio
$154 Roundtrip, found 2 days ago
$154
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Fri, Jan 9 from Washington to San Antonio, returning Sun, Jan 11, priced at $154 found 2 days ago
Frontier Airlines
Sat, Dec 13 - Tue, Dec 16
IAD
Washington
SAT
San Antonio
$184 Roundtrip, found 1 day ago
$184
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Dec 13 from Washington to San Antonio, returning Tue, Dec 16, priced at $184 found 1 day ago
Frontier Airlines
Mon, Nov 10 - Fri, Nov 14
IAD
Washington
SAT
San Antonio
$193 Roundtrip, found 2 days ago
$193
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Mon, Nov 10 from Washington to San Antonio, returning Fri, Nov 14, priced at $193 found 2 days ago
Frontier Airlines
Sat, Dec 13 - Tue, Dec 16
IAD
Washington
SAT
San Antonio
$203 Roundtrip, found 1 day ago
$203
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Dec 13 from Washington to San Antonio, returning Tue, Dec 16, priced at $203 found 1 day ago
Frontier Airlines
Sat, Dec 6 - Sun, Dec 14
IAD
Washington
SAT
San Antonio
$205 Roundtrip, found 19 hours ago
$205
Roundtrip
found 19 hours ago
Select Frontier Airlines flight, departing Sat, Dec 6 from Washington to San Antonio, returning Sun, Dec 14, priced at $205 found 19 hours ago
Delta
Thu, Jan 15 - Mon, Jan 19
IAD
Washington
SAT
San Antonio
$227 Roundtrip, found 7 hours ago
$227
Roundtrip
found 7 hours ago
Select Delta flight, departing Thu, Jan 15 from Washington to San Antonio, returning Mon, Jan 19, priced at $227 found 7 hours ago
Southwest Airlines
Mon, Jan 26 - Wed, Jan 28
IAD
Washington
SAT
San Antonio
$227 Roundtrip, found 9 hours ago
$227
Roundtrip
found 9 hours ago
Select Southwest Airlines flight, departing Mon, Jan 26 from Washington to San Antonio, returning Wed, Jan 28, priced at $227 found 9 hours ago
United
Fri, Dec 5 - Sun, Dec 7
IAD
Washington
SAT
San Antonio
$249 Roundtrip, found 4 hours ago
$249
Roundtrip
found 4 hours ago
Select United flight, departing Fri, Dec 5 from Washington to San Antonio, returning Sun, Dec 7, priced at $249 found 4 hours ago
American Airlines
Thu, Feb 19 - Sat, Feb 21
IAD
Washington
SAT
San Antonio
$257 Roundtrip, found 5 days ago
$257
Roundtrip
found 5 days ago
Select American Airlines flight, departing Thu, Feb 19 from Washington to San Antonio, returning Sat, Feb 21, priced at $257 found 5 days ago

Find the cheapest month to fly from Washington (IAD) to San Antonio (SAT)

September is typically the cheapest month to fly

From $154 - $494 per traveler.

Alternative airports near San Antonio

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to San Antonio Intl. SAT. Cheapest and Closest option available. Average driving time to city center is 11 minutes. Flights from $299
SAT
San Antonio Intl.
CheapestClosest
Average driving time to city center11 min
Flights from $299
Flights from Washington (IAD) to San Antonio (SAT)
Origin airport
Washington Dulles Intl.
Destination airport
San Antonio Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$130
Distance
1361 mi
Average flight time
2 hours 50 mins

Washington to San Antonio Flights

The cheapest times to fly from Washington to San Antonio

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to San Antonio are during the month of January. You can find some of the cheapest flights from Washington to San Antonio with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to San Antonio

Sunday is one of the best days to book for cheap flights from Washington to San Antonio: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to San Antonio

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to San Antonio in 2025. You can also book with separate airlines for your outbound and return journeys, from $66 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to San Antonio flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to San Antonio airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT) cost?
Grab a cheap one-way flight from $66 or cheap return flight from $147 from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT)?
Traveling in January is a great way to save, as it's the cheapest month for flights between IAD and SAT. You'll often find the lowest fares during the off-season.
Which airlines fly direct from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT)?
Take a nonstop flight with United Airlines and head straight from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT).
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT)?
To find the cheapest airline flying from IAD to SAT, use Expedia's filter tool. Tailor your search based on your travel style, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT)?
Daily, an average of 2 nonstop flights operate from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT). Choose the departure time that best suits your plans.
What are the most popular departure times for flights from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT)?
The 5 PM departures from IAD to SAT are typically the busiest. They can also be more expensive. If you want to save on your fare, choose a less crowded time to fly.
What day of the week has the most flights from IAD to SAT?
If you fly on a Friday, you'll get the biggest range of options for flights from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT).
What is the earliest flight from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT)?
Washington Dulles Intl. Airport (IAD)'s first flight to San Antonio Intl. Airport (SAT) takes off at approximately 8:15AM UTC-5. With a flight time of 3h 57m, you'll touch down at around 11:12AM UTC-6.
How long does it take to fly from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT)?
Flights from IAD to SAT have an average travel time of 3 hours and 57 minutes. The total distance between the two airports is 1,350 mi.
What airline has the least delays from IAD to SAT?
With 82% of journeys generally landing on time, United Airlines has the best on-time performance for direct flights from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT). To check your flight status and get notifications if anything changes, use the Expedia App.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT)?
To avoid possible delays on the Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT) route, travel before 3 PM. Later flights have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for San Antonio from Washington Dulles Intl. Airport (IAD)?
If you're on a direct flight from Washington Dulles Intl. Airport (IAD) to San Antonio, San Antonio Intl. Airport (SAT) is the only airport you can land at.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT) last-minute?
Booking your plane ticket from IAD to SAT just before your getaway is usually more expensive. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book an IAD to SAT flight and hotel package?
Compared with arranging hotels and flights separately, booking an IAD to SAT flight and hotel package with Expedia could lead to significant savings. What's more, managing everything in one place will take the stress out of travel planning. Simply pick your flights and choose from our extensive range of hotels, then personalize your trip with other add-ons like car rentals and activities.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT)?
In most cases, you're able to reschedule or cancel your IAD to SAT flight. However, there may be additional charges, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline's fees and guidelines on flight changes, or if you need further information, visit our Customer Service portal.

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*Available to One Key members.