£244 Cheap Flights from Washington (IAD) to San Antonio (SAT)

View £244 flight on Thu, 21 May 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at £244 for one-way flights and £214 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, 19 May - Wed, 20 May
IAD
Washington
SAT
San Antonio
£214 Return, found 5 days ago
£214
Return
found 5 days ago
Select Delta flight, departing Tue, 19 May from Washington to San Antonio, returning Wed, 20 May, priced at £214 found 5 days ago
Delta
Tue, 19 May - Thu, 28 May
IAD
Washington
SAT
San Antonio
£229 Return, found 5 days ago
£229
Return
found 5 days ago
Select Delta flight, departing Tue, 19 May from Washington to San Antonio, returning Thu, 28 May, priced at £229 found 5 days ago
Delta
Mon, 18 May - Thu, 28 May
IAD
Washington
SAT
San Antonio
£244 Return, found 5 days ago
£244
Return
found 5 days ago
Select Delta flight, departing Mon, 18 May from Washington to San Antonio, returning Thu, 28 May, priced at £244 found 5 days ago
Delta
Tue, 19 May - Sun, 24 May
IAD
Washington
SAT
San Antonio
£252 Return, found 5 days ago
£252
Return
found 5 days ago
Select Delta flight, departing Tue, 19 May from Washington to San Antonio, returning Sun, 24 May, priced at £252 found 5 days ago
Delta
Mon, 18 May - Sun, 24 May
IAD
Washington
SAT
San Antonio
£266 Return, found 5 days ago
£266
Return
found 5 days ago
Select Delta flight, departing Mon, 18 May from Washington to San Antonio, returning Sun, 24 May, priced at £266 found 5 days ago
Delta
Tue, 19 May - Sat, 23 May
IAD
Washington
SAT
San Antonio
£273 Return, found 5 days ago
£273
Return
found 5 days ago
Select Delta flight, departing Tue, 19 May from Washington to San Antonio, returning Sat, 23 May, priced at £273 found 5 days ago
Delta
Fri, 22 May - Sun, 24 May
IAD
Washington
SAT
San Antonio
£288 Return, found 5 days ago
£288
Return
found 5 days ago
Select Delta flight, departing Fri, 22 May from Washington to San Antonio, returning Sun, 24 May, priced at £288 found 5 days ago
United
Thu, 21 May - Wed, 27 May
IAD
Washington
SAT
San Antonio
£288 Return, found 5 days ago
£288
Return
found 5 days ago
Select United flight, departing Thu, 21 May from Washington to San Antonio, returning Wed, 27 May, priced at £288 found 5 days ago
American Airlines
Sat, 23 May - Tue, 26 May
IAD
Washington
SAT
San Antonio
£311 Return, found 5 days ago
£311
Return
found 5 days ago
Select American Airlines flight, departing Sat, 23 May from Washington to San Antonio, returning Tue, 26 May, priced at £311 found 5 days ago
Alaska Airlines
Tue, 2 Jun - Thu, 4 Jun
IAD
Washington
SAT
San Antonio
£620 Return, found 3 days ago
£620
Return
found 3 days ago
Select Alaska Airlines flight, departing Tue, 2 Jun from Washington to San Antonio, returning Thu, 4 Jun, priced at £620 found 3 days ago

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 centre is 11 minutes. Flights from £894
SAT
San Antonio Intl.
CheapestClosest
Average driving time to city centre11 min
Flights from £894

Frequently asked questions

What is the cheapest month to fly from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
January is typically the cheapest month to fly from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.), with average return fares of approximately £471. This is about 14% lower than the average price throughout the year. January often sees lower prices because it falls after the busy holiday travel season, when demand for flights tends to decrease. Other cheap months to fly from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.) include August and September.
Which airlines fly direct from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
Enter IAD to SAT and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
To find a cheap flight from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
The best airline to fly with from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.) will differ from traveller to traveller. If you like to fly early, UA offers early morning flights. If price is the most important factor, UA typically offers the lowest fares. UA offers the most daily flights from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.), which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
Based on booking data from the past year, the cheapest months to fly from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.) are typically January and August, with average return flight prices around £471. While these months offer the best value, they might not always align with peak travel times, so you'll want to consider your priorities for weather and activities in San Antonio.
How many flights per day from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
There are approximately 2 nonstop flights per day from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.). For even more choice, look at flights that include layovers, as there are around 53 connecting flights per day. Some common connection points include Hartsfield-Jackson Atlanta Intl. (ATL), Denver Intl. (DEN), and Seattle - Tacoma Intl. (SEA).
What is the earliest flight from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
The earliest flight from Washington, DC (IAD-Washington Dulles Intl.) (IAD) to San Antonio, TX (SAT-San Antonio Intl.) (SAT) typically departs at approximately 5:00 AM local time, operated by American Airlines. This is a seasonal service active in February and March. An early departure like this can help maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
You'll typically find the most flights from Washington Dulles Intl. (IAD) to San Antonio Intl. (SAT) on a Thursday, with around 38 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include United Airlines, Delta Air Lines, and American Airlines. Flight schedules are consistent throughout the week, so you'll have plenty of options no matter when you choose to fly.
What are the most popular departure times for flights from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
The most popular departure times for flights from Washington Dulles Intl. (IAD) to San Antonio Intl. (SAT) are in the early morning, from 6am to 9am. About 43% of passengers prefer this time. Many major carriers, including United Airlines and Delta Air Lines, offer flights during this window. This timing works well because it allows you to get an early start on your travel day and arrive in San Antonio with plenty of time.
How long does it take to fly from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
Direct flights from IAD to SAT usually take about 3 hours 50 minutes, traveling roughly 1,361 miles. If you opt for a connecting flight, expect to add around 2 hours to your journey. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
Select the "Business class" and "First class" filters when looking for IAD to SAT flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.) flight with Expedia?
It's easy to earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for San Antonio from Washington Dulles Intl. (IAD)?
From Washington Dulles Intl. (IAD), you can fly directly into San Antonio Intl. (SAT) to reach San Antonio. Some flights may connect through major hubs like San Diego Intl. (SAN), Denver Intl. (DEN), Hopkins Intl. (CLE) before reaching San Antonio. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.) at the last minute?
Typically, booking a last minute flight from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. 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 a Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.) flight and hotel package?
Securing a Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
If you booked your Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
San Antonio Intl.
Return price
£214
Distance
2178 km
Average flight time
2 hours 51 mins

Book with confidence

Compare flights from Washington to San Antonio easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Washington to San Antonio. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to San Antonio Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Washington Dulles Intl. to San Antonio Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Washington Dulles Intl. (IAD) to San Antonio Intl. (SAT)

The easiest way to view the best deals on flights from Washington to San Antonio today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Washington Dulles Intl. to San Antonio Intl. start at just £214 and range up to £620.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Washington and San Antonio
  • booking your flight during May, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Washington to San Antonio flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Washington Dulles Intl. to San Antonio Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Washington to San Antonio easily and book with confidence

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