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CA $401 Cheap Flights from Washington (IAD) to San Antonio (SAT)

View CA $401 flight on Sun, Aug 9, 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 CA $401 for one-way flights and CA $823 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Mon, Aug 3 - Fri, Aug 7
IAD
Washington
SAT
San Antonio
CA $823 Roundtrip, found 14 hours ago
CA $823
Roundtrip
found 14 hours ago
Select Delta flight, departing Mon, Aug 3 from Washington to San Antonio, returning Fri, Aug 7, priced at CA $823 found 14 hours ago
American Airlines
Mon, Aug 3 - Fri, Aug 7
IAD
Washington
SAT
San Antonio
CA $832 Roundtrip, found 14 hours ago
CA $832
Roundtrip
found 14 hours ago
Select American Airlines flight, departing Mon, Aug 3 from Washington to San Antonio, returning Fri, Aug 7, priced at CA $832 found 14 hours ago
Delta
Mon, Aug 3 - Fri, Aug 7
IAD
Washington
SAT
San Antonio
CA $866 Roundtrip, found 14 hours ago
CA $866
Roundtrip
found 14 hours ago
Select Delta flight, departing Mon, Aug 3 from Washington to San Antonio, returning Fri, Aug 7, priced at CA $866 found 14 hours ago
Delta
Sun, Jul 26 - Thu, Jul 30
IAD
Washington
SAT
San Antonio
CA $868 Roundtrip, found 3 days ago
CA $868
Roundtrip
found 3 days ago
Select Delta flight, departing Sun, Jul 26 from Washington to San Antonio, returning Thu, Jul 30, priced at CA $868 found 3 days ago
Delta
Mon, Aug 3 - Fri, Aug 7
IAD
Washington
SAT
San Antonio
CA $908 Roundtrip, found 14 hours ago
CA $908
Roundtrip
found 14 hours ago
Select Delta flight, departing Mon, Aug 3 from Washington to San Antonio, returning Fri, Aug 7, priced at CA $908 found 14 hours ago
Delta
Mon, Aug 3 - Fri, Aug 7
IAD
Washington
SAT
San Antonio
CA $931 Roundtrip, found 14 hours ago
CA $931
Roundtrip
found 14 hours ago
Select Delta flight, departing Mon, Aug 3 from Washington to San Antonio, returning Fri, Aug 7, priced at CA $931 found 14 hours ago
Delta
Mon, Jul 27 - Thu, Jul 30
IAD
Washington
SAT
San Antonio
CA $933 Roundtrip, found 3 days ago
CA $933
Roundtrip
found 3 days ago
Select Delta flight, departing Mon, Jul 27 from Washington to San Antonio, returning Thu, Jul 30, priced at CA $933 found 3 days ago
Delta
Mon, Jul 27 - Thu, Jul 30
IAD
Washington
SAT
San Antonio
CA $946 Roundtrip, found 3 days ago
CA $946
Roundtrip
found 3 days ago
Select Delta flight, departing Mon, Jul 27 from Washington to San Antonio, returning Thu, Jul 30, priced at CA $946 found 3 days ago
American Airlines
Mon, Aug 3 - Fri, Aug 7
IAD
Washington
SAT
San Antonio
CA $953 Roundtrip, found 14 hours ago
CA $953
Roundtrip
found 14 hours ago
Select American Airlines flight, departing Mon, Aug 3 from Washington to San Antonio, returning Fri, Aug 7, priced at CA $953 found 14 hours ago
Alaska Airlines
Sun, Jul 26 - Thu, Jul 30
IAD
Washington
SAT
San Antonio
CA $1,412 Roundtrip, found 3 days ago
CA $1,412
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sun, Jul 26 from Washington to San Antonio, returning Thu, Jul 30, priced at CA $1,412 found 3 days ago

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

February is typically the cheapest month to fly

From CA $284 - CA $676 per traveller.

Frequently asked questions

How much does a flight from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.) cost?
You can find one-way and return flights from IAD to SAT with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when IAD to SAT ticket fares go up or down.
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) to San Antonio, TX (SAT), with average return fares around CA$471. January often sees lower prices because it falls after the busy holiday travel season, when demand tends to decrease and airlines offer more competitive fares. Other budget-friendly months to consider for your trip include August and September.
Which airlines fly direct from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
Only one airline offers direct flights from Washington Dulles Intl. (IAD) to San Antonio Intl. (SAT).United operates 15 direct flights from Washington Dulles Intl. to San Antonio Intl. every week.
What is the cheapest airline that flies from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
For connecting flights, Frontier Airlines is one of the cheapest, with return tickets starting from around CA$290. United is one of the cheapest airlines offering nonstop return flights from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.), with tickets starting from around CA$299 for flights that can be booked for departure within the next year. These prices are for economy/coach class per adult. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from Washington, DC (IAD) to San Antonio, TX (SAT)?
To find a cheap flight from Washington, DC (IAD) to San Antonio, TX (SAT), 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 traveler to traveler. If you like to fly early, United offers early morning flights. If price is the most important factor, United typically offers the lowest fares. United offers the most daily flights from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.), which is great 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.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
You'll find around 2 nonstop flights per day from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.). For even more choices, look at flights that include layovers, as there are approximately 52 connecting flights per day. Some common connection points include Seattle - Tacoma Intl. (SEA), Hartsfield-Jackson Atlanta Intl. (ATL), and George Bush Intercontinental (IAH).
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 Dulles Intl. (IAD) to San Antonio Intl. (SAT) typically departs around 5:00 AM. This service is offered by American Airlines. This is a seasonal service, active in February and March. An early departure like this can help you make the most of 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 40 flights available. This gives you a good selection of options for your journey. Major airlines on this route include United, Delta, and American Airlines. Flight schedules are fairly consistent throughout the week, so you'll have plenty of options no matter which day 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, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.) are in the early morning, from 6am to 9am. Many major carriers, including United, Delta and American Airlines, offer flights during this window. Many travellers prefer these early morning flights as they allow you to arrive at your destination with plenty of time to start your day.
How long does it take to fly from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
When flying from Washington, DC (IAD-Washington Dulles Intl.) to San Antonio, TX (SAT-San Antonio Intl.), you have a few options. A nonstop flight typically takes around 3 hours 48 minutes, covering a distance of approximately 2,190 kilometers. If you opt for a one-stop flight, your journey will usually be longer, taking about 7 hours 18 minutes. Flights with two or more stops will extend your travel time even further, to roughly 11 hours 18 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns 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.)?
Yes, you can fly business or first class between IAD and SAT.Airlines that offer business class service on this route include:

  • Frontier Airlines
  • Delta

First class cabins are available on:

  • Alaska Airlines
  • American Airlines
  • Delta
  • United

How do I earn miles on a Washington, DC (IAD) to San Antonio, TX (SAT) flight with Expedia?
It's easy to earn miles on a Washington, DC (IAD) to San Antonio, TX (SAT) 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, TX (SAT) from Washington, DC (IAD)?
If you're planning to travel to San Antonio from Washington Dulles Intl. (IAD), you can fly directly into San Antonio Intl. (SAT). Some flights may connect through major hubs like San Diego Intl. (SAN), Hopkins Intl. (CLE), or Orlando Intl. (MCO) 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) to San Antonio, TX (SAT) at the last minute?
Typically, booking a last minute flight from Washington, DC (IAD) to San Antonio, TX (SAT) 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) to San Antonio, TX (SAT) flight and hotel package?
Securing a Washington, DC (IAD) to San Antonio, TX (SAT) 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) to San Antonio, TX (SAT)?
If you booked your Washington, DC (IAD) to San Antonio, TX (SAT) 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.
Roundtrip price
CA $823
Distance
2178 km
Average flight time
3 hours 59 mins

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Chantilly to San Antonio Flights

The easy way to book your flights from Washington to San Antonio 

With Expedia, it’s simple to find and book flights to San Antonio from Washington whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to San Antonio Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Washington to San Antonio today, tomorrow, or this week.  

 

Save dollars with cheap flights from Washington Dulles Intl., IAD to San Antonio Intl., SAT 

Sort your search results by price to find great deals on your flight from Washington to San Antonio—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to San Antonio from Washington currently is just CA $823 rising to CA $1,412.  

Here are more money-saving tips: 

  • Fly in August when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to San Antonio  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to San Antonio from Washington 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to San Antonio with Expedia today.

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