$101 Cheap Flights from Seattle (SEA) to San Antonio (SAT)

View $101 flight on Sun, May 10, 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 $101 for one-way flights and $190 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, May 7 - Fri, May 8
SEA
Seattle
SAT
San Antonio
$190 Roundtrip, found 4 hours ago
$190
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Thu, May 7 from Seattle to San Antonio, returning Fri, May 8, priced at $190 found 4 hours ago
Delta
Tue, May 5 - Tue, May 5
SEA
Seattle
SAT
San Antonio
$191 Roundtrip, found 4 days ago
$191
Roundtrip
found 4 days ago
Select Delta flight, departing Tue, May 5 from Seattle to San Antonio, returning Tue, May 5, priced at $191 found 4 days ago
Southwest Airlines
Tue, Apr 28 - Sun, May 3
SEA
Seattle
SAT
San Antonio
$208 Roundtrip, found 19 hours ago
$208
Roundtrip
found 19 hours ago
Select Southwest Airlines flight, departing Tue, Apr 28 from Seattle to San Antonio, returning Sun, May 3, priced at $208 found 19 hours ago
Frontier Airlines
Sat, Apr 11 - Mon, Apr 13
SEA
Seattle
SAT
San Antonio
$211 Roundtrip, found 1 hour ago
$211
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Sat, Apr 11 from Seattle to San Antonio, returning Mon, Apr 13, priced at $211 found 1 hour ago
Southwest Airlines
Tue, Apr 28 - Sun, May 3
SEA
Seattle
SAT
San Antonio
$214 Roundtrip, found 19 hours ago
$214
Roundtrip
found 19 hours ago
Select Southwest Airlines flight, departing Tue, Apr 28 from Seattle to San Antonio, returning Sun, May 3, priced at $214 found 19 hours ago
American Airlines
Fri, Apr 17 - Sun, Apr 19
SEA
Seattle
SAT
San Antonio
$218 Roundtrip, found 1 hour ago
$218
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Fri, Apr 17 from Seattle to San Antonio, returning Sun, Apr 19, priced at $218 found 1 hour ago
Southwest Airlines
Tue, Apr 28 - Sun, May 3
SEA
Seattle
SAT
San Antonio
$219 Roundtrip, found 19 hours ago
$219
Roundtrip
found 19 hours ago
Select Southwest Airlines flight, departing Tue, Apr 28 from Seattle to San Antonio, returning Sun, May 3, priced at $219 found 19 hours ago
Frontier Airlines
Sun, May 10 - Tue, May 12
SEA
Seattle
SAT
San Antonio
$223 Roundtrip, found 1 hour ago
$223
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Sun, May 10 from Seattle to San Antonio, returning Tue, May 12, priced at $223 found 1 hour ago
United
Wed, Apr 22 - Thu, Apr 30
SEA
Seattle
SAT
San Antonio
$226 Roundtrip, found 13 hours ago
$226
Roundtrip
found 13 hours ago
Select United flight, departing Wed, Apr 22 from Seattle to San Antonio, returning Thu, Apr 30, priced at $226 found 13 hours ago
Delta
Fri, Apr 17 - Sun, Apr 19
SEA
Seattle
SAT
San Antonio
$226 Roundtrip, found 1 hour ago
$226
Roundtrip
found 1 hour ago
Select Delta flight, departing Fri, Apr 17 from Seattle to San Antonio, returning Sun, Apr 19, priced at $226 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 $447
SAT
San Antonio Intl.
CheapestClosest
Average driving time to city center11 min
Flights from $447

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 - Tacoma Intl. Airport (SEA) to San Antonio Intl. Airport (SAT) cost?
Lock in a cheap one-way flight from $101 or cheap return flight from $190 from Seattle - Tacoma Intl. Airport (SEA) to San Antonio Intl. Airport (SAT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to San Antonio Intl. Airport (SAT)?
The cheapest month to fly from SEA to SAT is May, when demand is low. Off-peak season is usually when you'll find lower airfares between these airports.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to San Antonio Intl. Airport (SAT)?
When heading out of Seattle - Tacoma Intl. Airport (SEA), you can hop on a direct flight to San Antonio Intl. Airport (SAT) with Alaska Airlines.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to San Antonio Intl. Airport (SAT)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest SEA to SAT flight.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to San Antonio Intl. Airport (SAT)?
On average you can take your pick of 5 direct flights each week from Seattle - Tacoma Intl. Airport (SEA) to San Antonio Intl. Airport (SAT). For more options, consider flights with layovers. Enter your dates on Expedia and then filter your search to show one or two stops.
What are the most popular departure times for flights from Seattle - Tacoma Intl. Airport (SEA) to San Antonio Intl. Airport (SAT)?
Flights between SEA and SAT are busiest at 8 AM. If you're after a less crowded experience and potentially cheaper fares, choose a time when demand is lower.
What day of the week has the most flights from SEA to SAT?
Friday has the most flights from Seattle - Tacoma Intl. Airport (SEA) to San Antonio Intl. Airport (SAT). Consider traveling on this day and you'll have a greater chance of finding a schedule that works for you.
What is the earliest flight from Seattle - Tacoma Intl. Airport (SEA) to San Antonio Intl. Airport (SAT)?
Hop on the earliest flight at around 8:01AM UTC-8, heading out of Seattle - Tacoma Intl. Airport (SEA). You'll be traveling for approximately 4h 6m, touching down at San Antonio Intl. Airport (SAT) at approximately 2:07PM UTC-6.
How long does it take to fly from Seattle - Tacoma Intl. Airport (SEA) to San Antonio Intl. Airport (SAT)?
It takes about 4 hours and 6 minutes to fly the 1,800 mi from SEA to SAT.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to San Antonio Intl. Airport (SAT)?
Select a flight from Seattle - Tacoma Intl. Airport (SEA) to San Antonio Intl. Airport (SAT) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures after this time have a 22% higher chance of being canceled, on average.**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 Seattle - Tacoma Intl. Airport (SEA)?
San Antonio Intl. Airport (SAT) is the only airport in San Antonio with direct flights from Seattle - Tacoma Intl. Airport (SEA). Check out the options and discover affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to San Antonio Intl. Airport (SAT) last-minute?
Booking your plane ticket from SEA to SAT just before your journey is usually more expensive. But if there's some wiggle room with your departure times and dates, you could score a cheap last-minute fare.
Is it cheaper to book a SEA to SAT flight and hotel package?
Booking a SEA to SAT flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Select from our wide range of stays and then add activities, car rentals and flights 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 - Tacoma Intl. Airport (SEA) to San Antonio Intl. Airport (SAT)?
If you reserved your SEA to SAT flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for further details.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
San Antonio Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$190
Distance
1773 mi
Average flight time
8 hours 8 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 May. 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 $101 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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