$95 Cheap Flights from Washington (IAD) to San Antonio (SAT)

View $95 flight on Thu, Nov 27, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $95 for one-way flights and $189 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Aug 30 - Sun, Aug 31
IAD
Washington
SAT
San Antonio
$189 Roundtrip, found 2 hours ago
$189
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Aug 30 from Washington to San Antonio, returning Sun, Aug 31, priced at $189 found 2 hours ago
United
Sat, Aug 30 - Sun, Aug 31
IAD
Washington
SAT
San Antonio
$199 Roundtrip, found 2 hours ago
$199
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Aug 30 from Washington to San Antonio, returning Sun, Aug 31, priced at $199 found 2 hours ago
United
Sat, Aug 30 - Sun, Aug 31
IAD
Washington
SAT
San Antonio
$204 Roundtrip, found 2 hours ago
$204
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Aug 30 from Washington to San Antonio, returning Sun, Aug 31, priced at $204 found 2 hours ago
Southwest Airlines
Thu, Nov 13 - Sat, Nov 15
IAD
Washington
SAT
San Antonio
$209 Roundtrip, found 4 days ago
$209
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Thu, Nov 13 from Washington to San Antonio, returning Sat, Nov 15, priced at $209 found 4 days ago
United
Tue, Aug 26 - Sat, Aug 30
IAD
Washington
SAT
San Antonio
$210 Roundtrip, found 21 hours ago
$210
Roundtrip
found 21 hours ago
Select United flight, departing Tue, Aug 26 from Washington to San Antonio, returning Sat, Aug 30, priced at $210 found 21 hours ago
Southwest Airlines
Sat, Aug 30 - Sun, Aug 31
IAD
Washington
SAT
San Antonio
$214 Roundtrip, found 2 hours ago
$214
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Sat, Aug 30 from Washington to San Antonio, returning Sun, Aug 31, priced at $214 found 2 hours ago
United
Sat, Aug 30 - Sun, Aug 31
IAD
Washington
SAT
San Antonio
$216 Roundtrip, found 2 hours ago
$216
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Aug 30 from Washington to San Antonio, returning Sun, Aug 31, priced at $216 found 2 hours ago
Delta
Tue, Aug 26 - Sat, Aug 30
IAD
Washington
SAT
San Antonio
$223 Roundtrip, found 21 hours ago
$223
Roundtrip
found 21 hours ago
Select Delta flight, departing Tue, Aug 26 from Washington to San Antonio, returning Sat, Aug 30, priced at $223 found 21 hours ago
Frontier Airlines
Sat, Oct 25 - Sat, Nov 1
IAD
Washington
SAT
San Antonio
$228 Roundtrip, found 13 hours ago
$228
Roundtrip
found 13 hours ago
Select Frontier Airlines flight, departing Sat, Oct 25 from Washington to San Antonio, returning Sat, Nov 1, priced at $228 found 13 hours ago
American Airlines
Fri, Aug 22 - Sun, Aug 24
IAD
Washington
SAT
San Antonio
$309 Roundtrip, just found
$309
Roundtrip
just found
Select American Airlines flight, departing Fri, Aug 22 from Washington to San Antonio, returning Sun, Aug 24, priced at $309 just found

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

January is typically the cheapest month to fly

From $177 - $389 per traveler.

Graph displaying average flight prices per month

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 $270
SAT
San Antonio Intl.
CheapestClosest
Average driving time to city center11 min
Flights from $270
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
$189
Distance
1361 mi
Average flight time
2 hours 34 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 August. 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 $95 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?
Score affordable return tickets from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT) starting at $189. Book your seat and get ready to go. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a United flight leaving IAD on August 18 2025 and touching down at SAT. The price was last updated on July 23 2025 and has not changed since.
What is the cheapest month to fly from IAD to SAT?
The cheapest flights from IAD to SAT are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
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 IAD to SAT?
Currently, the cheapest carrier operating one-way flights from IAD to SAT is United. You can jet off on this route from $116. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from IAD on October 11 2025. Prices were last updated on July 23 2025 and have not changed since.
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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