$105 Cheap Flights from Seattle (SEA) to San Antonio (SAT)

View $105 flight on Sat, May 16, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to San Antonio International Airport (SAT)

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Cheap Flights from Seattle to San Antonio (SEA-SAT)

Prices were available within the past 7 days and start at $105 for one-way flights and $210 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Apr 11 - Mon, Apr 13
SEA
Seattle
SAT
San Antonio
$210 Roundtrip, found 2 hours ago
$210
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sat, Apr 11 from Seattle to San Antonio, returning Mon, Apr 13, priced at $210 found 2 hours ago
Frontier Airlines
Thu, Apr 23 - Thu, Apr 30
SEA
Seattle
SAT
San Antonio
$231 Roundtrip, found 3 hours ago
$231
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Thu, Apr 23 from Seattle to San Antonio, returning Thu, Apr 30, priced at $231 found 3 hours ago
Frontier Airlines
Thu, May 7 - Fri, May 15
SEA
Seattle
SAT
San Antonio
$233 Roundtrip, found 1 hour ago
$233
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Thu, May 7 from Seattle to San Antonio, returning Fri, May 15, priced at $233 found 1 hour ago
Frontier Airlines
Thu, May 7 - Fri, May 15
SEA
Seattle
SAT
San Antonio
$238 Roundtrip, found 1 hour ago
$238
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Thu, May 7 from Seattle to San Antonio, returning Fri, May 15, priced at $238 found 1 hour ago
Southwest Airlines
Tue, Apr 21 - Thu, Apr 23
SEA
Seattle
SAT
San Antonio
$238 Roundtrip, found 1 hour ago
$238
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Tue, Apr 21 from Seattle to San Antonio, returning Thu, Apr 23, priced at $238 found 1 hour ago
Frontier Airlines
Sat, May 16 - Wed, Jun 3
SEA
Seattle
SAT
San Antonio
$241 Roundtrip, found 1 day ago
$241
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, May 16 from Seattle to San Antonio, returning Wed, Jun 3, priced at $241 found 1 day ago
Southwest Airlines
Sat, Apr 25 - Sun, May 3
SEA
Seattle
SAT
San Antonio
$244 Roundtrip, found 1 hour ago
$244
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Sat, Apr 25 from Seattle to San Antonio, returning Sun, May 3, priced at $244 found 1 hour ago
American Airlines
Mon, Apr 27 - Thu, Apr 30
SEA
Seattle
SAT
San Antonio
$249 Roundtrip, found 12 hours ago
$249
Roundtrip
found 12 hours ago
Select American Airlines flight, departing Mon, Apr 27 from Seattle to San Antonio, returning Thu, Apr 30, priced at $249 found 12 hours ago
United
Tue, Apr 21 - Wed, Apr 29
SEA
Seattle
SAT
San Antonio
$250 Roundtrip, found 1 hour ago
$250
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Apr 21 from Seattle to San Antonio, returning Wed, Apr 29, priced at $250 found 1 hour ago
Alaska Airlines
Tue, May 5 - Wed, May 13
SEA
Seattle
SAT
San Antonio
$257 Roundtrip, found 1 hour ago
$257
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Tue, May 5 from Seattle to San Antonio, returning Wed, May 13, priced at $257 found 1 hour ago

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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 $304
SAT
San Antonio Intl.
CheapestClosest
Average driving time to city center11 min
Flights from $304

Find the cheapest month to fly from Seattle (SEA) to San Antonio (SAT)

September is typically the cheapest month to fly

From $122 - $397 per traveler.

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.) cost?
You can find cheap one-way flights from $105 and cheap return flights from $210 Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.) with Expedia. One-way flights generally range between $103 and $1325, and roundtrip flights usually range from $293 to $1707. 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 the cheapest fares first, and use the Price Tracking tool to receive alerts when Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
January is the cheapest month to fly from Seattle (SEA) to San Antonio (SAT), with average return fares around $286. This is about 20% lower than the average price throughout the year, as winter travel tends to be less busy. Other economical months to consider are August and September.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
You can fly direct from SEA to SAT on Hawaiian Airlines, with around 7 flights per week.
What is the cheapest airline that flies from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
Sun Country Airlines is one of the cheapest airlines offering connecting flights from Seattle - Tacoma Intl. (SEA) to San Antonio Intl. (SAT), with round-trip tickets starting from around $320. 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.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
The best airline to fly with from Seattle, WA (SEA) to San Antonio, TX (SAT) will differ from traveler to traveler. If you like to fly early, Alaska Airlines offers early morning flights. If price is the most important factor, Alaska Airlines typically offers the lowest fares. WN offers the most daily flights from SEA to SAT, 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
The best time to fly from Seattle (SEA) to San Antonio (SAT) is typically in January or September. During these months, you can find return flights at around $286, making it a budget-friendly option. January is ideal as it follows the holiday rush, while September offers pleasant weather and fewer crowds, giving you a great travel experience.*Prices based on flights available on Expedia in the last year.
How many flights per day from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
There are approximately 1 nonstop flights per day from Seattle - Tacoma Intl. (SEA) to San Antonio Intl. (SAT). For more options, look at flights that include layovers.
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
The earliest flight from Seattle - Tacoma International Airport (SEA) to San Antonio International Airport (SAT) typically departs at around 12:05 AM, operated by American Airlines. This is a seasonal service active in February and March, and an early departure can help you make the most of your time in San Antonio. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
The most popular departure times for flights from Seattle - Tacoma Intl. (SEA) to San Antonio Intl. (SAT) are in the early morning, from 6am to 9am. About 24% of passengers prefer this time window. Many major carriers, including American Airlines, United Airlines and Southwest Airlines, offer flights during this window. This timing works well because it allows you to start your day early and arrive in San Antonio with plenty of time to enjoy the city.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
Flying nonstop from SEA to SAT takes around 4 hours, with the route covering approximately 1,773 miles. Flights with a layover typically take 2 hours 20 minutes longer than direct options. 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
First class seats are offered on the SEA to SAT route. First class cabins are available on:

  • American Airlines
  • Delta Air Lines
  • United Airlines

How much is a business class flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
A direct, return business class ticket from Seattle (SEA) to San Antonio (SAT) typically costs between $1,173 and $1,808 per adult. A non-stop, one-way business class flight is usually around $1,283 to $1,558. This route offers a great opportunity to explore the rich history and culture of San Antonio. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma 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 Seattle - Tacoma Intl. (SEA)?
If you're planning to travel to San Antonio from Seattle - Tacoma Intl. (SEA), you can fly into San Antonio Intl. (SAT) Some flights may connect through major hubs like Denver Intl. (DEN), Norman Y. Mineta San Jose Intl. (SJC), Sacramento Intl. (SMF) 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.) San Antonio Vacation Packages 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to San Antonio, TX (SAT-San Antonio Intl.)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma 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
Seattle - Tacoma Intl.
Destination airport
San Antonio Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, Sun Country Airlines, United
Roundtrip price
$210
Distance
1773 mi
Average flight time
8 hours 51 mins

Book with confidence

Seattle to San Antonio Flights

The cheapest times to fly from Seattle 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 Seattle to San Antonio are during the month of April. You can find some of the cheapest flights from Seattle to San Antonio with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Seattle 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 Seattle 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 Seattle to San Antonio in 2026. You can also book with separate airlines for your outbound and return journeys, from $105 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 Seattle 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 Seattle 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.

 

Seattle to San Antonio Flights

*Flight schedules are subject to change.

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*Available to One Key members.