$70 Cheap Flights from San Antonio (SAT) to Washington (IAD)

View $70 flight on Mon, Nov 17, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $70 for one-way flights and $138 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sun, Dec 7 - Mon, Jan 12
SAT
San Antonio
IAD
Washington
$138 Roundtrip, found 21 hours ago
$138
Roundtrip
found 21 hours ago
Select Frontier Airlines flight, departing Sun, Dec 7 from San Antonio to Washington, returning Mon, Jan 12, priced at $138 found 21 hours ago
Frontier Airlines
Mon, Nov 17 - Sat, Dec 6
SAT
San Antonio
IAD
Washington
$140 Roundtrip, just found
$140
Roundtrip
just found
Select Frontier Airlines flight, departing Mon, Nov 17 from San Antonio to Washington, returning Sat, Dec 6, priced at $140 just found
Frontier Airlines
Mon, Nov 17 - Fri, Dec 5
SAT
San Antonio
IAD
Washington
$148 Roundtrip, just found
$148
Roundtrip
just found
Select Frontier Airlines flight, departing Mon, Nov 17 from San Antonio to Washington, returning Fri, Dec 5, priced at $148 just found
Frontier Airlines
Sun, Feb 22 - Fri, Feb 27
SAT
San Antonio
IAD
Washington
$154 Roundtrip, found 3 days ago
$154
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Sun, Feb 22 from San Antonio to Washington, returning Fri, Feb 27, priced at $154 found 3 days ago
Frontier Airlines
Mon, Nov 17 - Fri, Dec 5
SAT
San Antonio
IAD
Washington
$162 Roundtrip, found 5 days ago
$162
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Mon, Nov 17 from San Antonio to Washington, returning Fri, Dec 5, priced at $162 found 5 days ago
Frontier Airlines
Fri, Nov 7 - Thu, Nov 20
SAT
San Antonio
IAD
Washington
$172 Roundtrip, found 4 days ago
$172
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Fri, Nov 7 from San Antonio to Washington, returning Thu, Nov 20, priced at $172 found 4 days ago
United
Tue, Dec 9 - Sat, Dec 13
SAT
San Antonio
IAD
Washington
$201 Roundtrip, found 17 hours ago
$201
Roundtrip
found 17 hours ago
Select United flight, departing Tue, Dec 9 from San Antonio to Washington, returning Sat, Dec 13, priced at $201 found 17 hours ago
Southwest Airlines
Wed, Dec 10 - Sat, Dec 13
SAT
San Antonio
IAD
Washington
$205 Roundtrip, found 4 days ago
$205
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Wed, Dec 10 from San Antonio to Washington, returning Sat, Dec 13, priced at $205 found 4 days ago
Delta
Tue, Dec 9 - Sat, Dec 13
SAT
San Antonio
IAD
Washington
$210 Roundtrip, found 17 hours ago
$210
Roundtrip
found 17 hours ago
Select Delta flight, departing Tue, Dec 9 from San Antonio to Washington, returning Sat, Dec 13, priced at $210 found 17 hours ago
American Airlines
Thu, Jan 8 - Mon, Jan 12
SAT
San Antonio
IAD
Washington
$229 Roundtrip, found 7 hours ago
$229
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Thu, Jan 8 from San Antonio to Washington, returning Mon, Jan 12, priced at $229 found 7 hours ago

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

September is typically the cheapest month to fly

From $154 - $506 per traveler.

Alternative airports near Washington

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

Select flight to Ronald Reagan Washington National DCA. Closest option available. Average driving time to city center is 8 minutes. Flights from $299
DCA
Ronald Reagan Washington National
Closest
Average driving time to city center8 min
Flights from $299

Frequently asked questions

How much does a flight from San Antonio Intl. Airport (SAT) to Washington Dulles Intl. Airport (IAD) cost?
Grab a cheap one-way flight from $70 or cheap return flight from $138 from San Antonio Intl. Airport (SAT) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from San Antonio Intl. Airport (SAT) to Washington Dulles Intl. Airport (IAD)?
The cheapest month to fly from SAT to IAD is December, when demand is low. Off-peak months are typically when airlines offer lower prices between these airports.
Which airlines fly direct from San Antonio Intl. Airport (SAT) to Washington Dulles Intl. Airport (IAD)?
When setting off from San Antonio Intl. Airport (SAT), you can take a nonstop flight to Washington Dulles Intl. Airport (IAD) with United Airlines.
What is the cheapest airline that flies from San Antonio Intl. Airport (SAT) to Washington Dulles Intl. Airport (IAD)?
To find the cheapest airline flying from SAT to IAD, 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 list the most affordable options first.
How many flights per day from San Antonio Intl. Airport (SAT) to Washington Dulles Intl. Airport (IAD)?
Each day on average, 2 direct flights operate from San Antonio Intl. Airport (SAT) to Washington Dulles Intl. Airport (IAD). Select the departure time that best suits your plans.
What are the most popular departure times for flights from San Antonio Intl. Airport (SAT) to Washington Dulles Intl. Airport (IAD)?
Flights between SAT and IAD tend to be busiest at 7 AM. If you're after a less crowded experience and potentially cheaper tickets, look for a departure outside the usual busy windows.
What day of the week has the most flights from SAT to IAD?
Depart on a Friday if you're searching for the biggest selection of flights from San Antonio Intl. Airport (SAT) to Washington Dulles Intl. Airport (IAD).
What is the earliest flight from San Antonio Intl. Airport (SAT) to Washington Dulles Intl. Airport (IAD)?
The earliest flight taking off from San Antonio Intl. Airport (SAT) is at around 7:45AM UTC-6. Hop on this flight and you'll touch down at Washington Dulles Intl. Airport (IAD) at approximately 11:55AM UTC-5. The total time in the air is 3h 10m.
How long does it take to fly from San Antonio Intl. Airport (SAT) to Washington Dulles Intl. Airport (IAD)?
Flights from SAT to IAD have an average travel time of 3 hours and 11 minutes. The total distance between these two airports is 1,350 mi.
What airline has the least delays from SAT to IAD?
Consider booking with United Airlines if you'd like to go straight from San Antonio Intl. Airport (SAT) to Washington Dulles Intl. Airport (IAD) without any interruptions. This carrier has the strongest track record for punctuality, with an on-time score of 84%. Want to get notified of any changes? You can check your flight status using the Expedia App.
What is the best time to fly from San Antonio Intl. Airport (SAT) to Washington Dulles Intl. Airport (IAD)?
To avoid possible delays on the San Antonio Intl. Airport (SAT) to Washington Dulles Intl. Airport (IAD) route, fly before 3 PM. Later flights have a 22% higher chance of cancellation.**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 Washington from San Antonio Intl. Airport (SAT)?
You'll arrive at Washington Dulles Intl. Airport (IAD) or Baltimore Washington Intl. Thurgood Marshall Airport (BWI) when traveling to Washington on a direct flight from San Antonio Intl. Airport (SAT).
Is it cheaper to buy a plane ticket from San Antonio Intl. Airport (SAT) to Washington Dulles Intl. Airport (IAD) last-minute?
Waiting until just before your departure to book a flight from SAT to IAD generally means paying more. While you may come across some last-minute discounts, they aren't always guaranteed. Keep your travel plans flexible for a better chance of snagging a bargain.
Is it cheaper to book a SAT to IAD flight and hotel package?
Compared with arranging flights and hotels separately, booking a SAT to IAD flight and hotel package with Expedia could result in significant savings. Better still, having everything in one convenient place will take the stress out of planning your trip. Simply pick your flights and select from our extensive range of stays, then tailor your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from San Antonio Intl. Airport (SAT) to Washington Dulles Intl. Airport (IAD)?
Typically, you can cancel or reschedule your SAT to IAD 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 policies on flight changes, or if you want more details, visit our Customer Service portal.

Travel information

Origin airport
San Antonio Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$138
Distance
1361 mi
Average flight time
4 hours 11 mins

Book with confidence

San Antonio to Washington Flights

The cheapest times to fly from San Antonio to Washington

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 San Antonio to Washington are during the month of December. You can find some of the cheapest flights from San Antonio to Washington with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from San Antonio to Washington: 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 San Antonio to Washington

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 San Antonio to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $70 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 San Antonio to Washington 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 San Antonio to Washington 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.

 

San Antonio to Washington Flights

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*Available to One Key members.