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Cheap flights from Seattle to San Antonio from $80

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to San Antonio departing on 9/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Seattle to San Antonio

Cheap round-trip flights

Delta Logo
5:30 am - 1:49 pmSEA-SAT
6h 19m1 stop
Delta Logo
12:40 pm - 6:36 pmSAT-SEA
7h 56m1 stop
$195Delta
Find Deal
Sat, Sep 6 - Sat, Sep 20
Frontier Logo
4:26 pm - 3:34 pmSEA-SAT
21h 08m1 stop
Frontier Logo
3:59 pm - 12:07 pmSAT-SEA
22h 08m1 stop
$197Frontier
Find Deal
Thu, Oct 9 - Wed, Oct 15
Southwest Logo
10:55 pm - 8:55 amSEA-SAT
8h 00m1 stop
Southwest Logo
4:05 pm - 11:30 pmSAT-SEA
9h 25m1 stop
$217Southwest
Find Deal
Sun, Sep 7 - Sat, Sep 13
Southwest Logo
5:00 am - 3:20 pmSEA-SAT
8h 20m1 stop
Southwest Logo
11:45 am - 4:50 pmSAT-SEA
7h 05m1 stop
$221Southwest
Find Deal
Fri, Sep 5 - Wed, Sep 10
Hawaiian Airlines Logo
5:55 pm - 12:03 amSEA-SAT
4h 08mnonstop
Hawaiian Airlines Logo
6:27 am - 8:55 amSAT-SEA
4h 28mnonstop
$232Hawaiian Airlines
Find Deal
Sun, Sep 7 - Sat, Sep 13
Alaska Airlines Logo
6:02 pm - 12:05 amSEA-SAT
4h 03mnonstop
Alaska Airlines Logo
6:55 pm - 9:31 pmSAT-SEA
4h 36mnonstop
$235Alaska Airlines
Find Deal
Fri, Nov 14 - Mon, Nov 24
Alaska Airlines Logo
5:55 pm - 12:03 amSEA-SAT
4h 08mnonstop
Alaska Airlines Logo
6:27 am - 8:55 amSAT-SEA
4h 28mnonstop
$237Alaska Airlines
Find Deal
Mon, Sep 8 - Sun, Sep 14
Hawaiian Airlines Logo
5:55 pm - 12:03 amSEA-SAT
4h 08mnonstop
Hawaiian Airlines Logo
7:57 pm - 10:27 pmSAT-SEA
4h 30mnonstop
$257Hawaiian Airlines
Find Deal
Sun, Sep 14 - Sun, Sep 21
American Airlines Logo
11:20 pm - 9:19 amSEA-SAT
7h 59m1 stop
American Airlines Logo
5:00 am - 10:52 amSAT-SEA
7h 52m1 stop
$266American Airlines
Find Deal
Sun, Oct 26 - Wed, Oct 29
American Airlines Logo
12:59 am - 12:03 pmSEA-SAT
9h 04m1 stop
American Airlines Logo
8:21 pm - 12:58 amSAT-SEA
6h 37m1 stop
$276American Airlines
Find Deal
Wed, Nov 19 - Sun, Nov 23

American Airlines flights from Seattle to San Antonio

Our best American Airlines deals on Seattle to San Antonio flight tickets
American Airlines
Aug 28
SEA12:58 amSeattle/Tacoma Intl
6h 18m
1 stop
SAT9:16 amSan Antonio
Sep 1
SAT5:00 amSan Antonio
7h 51m
1 stop
SEA10:51 amSeattle/Tacoma Intl
$247
Find similar
American Airlines
Oct 26
SEA11:20 pmSeattle/Tacoma Intl
7h 59m
1 stop
SAT9:19 amSan Antonio
Oct 29
SAT5:00 amSan Antonio
7h 52m
1 stop
SEA10:52 amSeattle/Tacoma Intl
$266
Find similar
American Airlines
Nov 19
SEA12:59 amSeattle/Tacoma Intl
9h 04m
1 stop
SAT12:03 pmSan Antonio
Nov 23
SAT8:21 pmSan Antonio
6h 37m
1 stop
SEA12:58 amSeattle/Tacoma Intl
$276
Find similar

Delta flights from Seattle to San Antonio

Our best Delta deals on Seattle to San Antonio flight tickets
Delta
Sep 6
SEA5:30 amSeattle/Tacoma Intl
6h 19m
1 stop
SAT1:49 pmSan Antonio
Sep 20
SAT12:40 pmSan Antonio
7h 56m
1 stop
SEA6:36 pmSeattle/Tacoma Intl
$195
Find similar
Delta
Aug 23
SEA5:30 amSeattle/Tacoma Intl
6h 09m
1 stop
SAT1:39 pmSan Antonio
Sep 20
SAT3:30 pmSan Antonio
8h 46m
1 stop
SEA10:16 pmSeattle/Tacoma Intl
$221
Find similar
Delta
Sep 17
SEA2:25 pmSeattle/Tacoma Intl
7h 27m
1 stop
SAT11:52 pmSan Antonio
Sep 21
SAT6:00 amSan Antonio
8h 45m
1 stop
SEA12:45 pmSeattle/Tacoma Intl
$246
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to San Antonio that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 18, 2025.
Use the filters below to find and compare flights from Seattle to San Antonio that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Sat 9/6

5:30 am-1:49 pm

1 stop6h 19m

San Antonio

Sat 9/20

12:40 pm-6:36 pm

1 stop7h 56m

$195

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Thu 10/9

4:26 pm-3:34 pm

1 stop21h 08m

San Antonio

Wed 10/15

3:59 pm-12:07 pm

1 stop22h 08m

$197

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Sun 9/7

10:55 pm-8:55 am

1 stop8h 00m

San Antonio

Sat 9/13

4:05 pm-11:30 pm

1 stop9h 25m

$217

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Fri 9/5

5:00 am-3:20 pm

1 stop8h 20m

San Antonio

Wed 9/10

11:45 am-4:50 pm

1 stop7h 05m

$221

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Sun 9/7

5:55 pm-12:03 am

Nonstop4h 08m

San Antonio

Sat 9/13

6:27 am-8:55 am

Nonstop4h 28m

$232

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Fri 11/14

6:02 pm-12:05 am

Nonstop4h 03m

San Antonio

Mon 11/24

6:55 pm-9:31 pm

Nonstop4h 36m

$235

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Mon 9/8

5:55 pm-12:03 am

Nonstop4h 08m

San Antonio

Sun 9/14

6:27 am-8:55 am

Nonstop4h 28m

$237

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Sun 9/14

5:55 pm-12:03 am

Nonstop4h 08m

San Antonio

Sun 9/21

7:57 pm-10:27 pm

Nonstop4h 30m

$257

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Sun 10/26

11:20 pm-9:19 am

1 stop7h 59m

San Antonio

Wed 10/29

5:00 am-10:52 am

1 stop7h 52m

$266

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Wed 11/19

12:59 am-12:03 pm

1 stop9h 04m

San Antonio

Sun 11/23

8:21 pm-12:58 am

1 stop6h 37m

$276

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Antonio from

How to get the cheapest flight ticket from Seattle to San Antonio

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Antonio?

If you aren’t able to travel during the month of January, then book flights to San Antonio from Seattle during August instead. Flights to San Antonio in August, while not as cheap as those in January, still average around $282.

What is the cheapest day to depart on your flight to San Antonio?

The cheapest day to depart on your flight to San Antonio is on a Wednesday when prices can be found for as low as $379. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to San Antonio on Sunday is $474.

What is the cheapest time of day to depart on your flight to San Antonio?

According to our data, the cheapest time of day to fly to San Antonio is at noon. momondo users have found flights departing from Seattle to San Antonio at noon for as low as $305. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to San Antonio are more costly in the morning, with an average ticket price of $442. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Seattle/Tacoma Intl to San Antonio flight route?

Fly from Seattle/Tacoma Intl to San Antonio for the best Seattle/Tacoma Intl - San Antonio flight prices

How far in advance should I book a flight to San Antonio?

You are more likely to see cheaper flights to San Antonio from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to San Antonio for around $355 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Antonio from Seattle for as low as $279 on momondo.

What cabin class options are available on Seattle/Tacoma Intl to San Antonio flights?

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to San Antonio flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Seattle to San Antonio flight prices changed over time?

As of August 2025, prices for Seattle to San Antonio flights are approximately 40% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to San Antonio

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to San Antonio according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to San Antonio (SEA to SAT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to San Antonio

Best Price Found

$80

Fastest flight time

3h 59m

Direct flights

Every day

Airports in San Antonio

1 airport
The best one-way flight to San Antonio from Seattle in the past 72 hours is $80. The best round-trip flight deal from Seattle to San Antonio found on momondo in the last 72 hours is $195.
The fastest flight from Seattle to San Antonio takes 3h 59m
Direct flights go from Seattle to San Antonio every day.
There is 1 airport near San Antonio: San Antonio (SAT)
Search flight deals

  • How far is Seattle/Tacoma Intl to San Antonio by plane?

    There are 1785.1 mi between Seattle/Tacoma Intl and San Antonio. A reasonable flight in good conditions will take 4h 03m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to San Antonio Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to San Antonio Airport are updated daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to San Antonio Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to San Antonio Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to San Antonio Airport.

  • What documentation or ID do you need to fly to San Antonio Airport?

    The travel and health documents you'll need for your trip to San Antonio Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Antonio Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Seattle to San Antonio?

  • What is the most popular airline from Seattle to San Antonio?

Best airlines flying from Seattle to San Antonio

Compare and see reviews for airlines that fly from Seattle to San Antonio with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $107Free CancellationRating
6.3
8,038 reviews
Search Spirit Airlines flights
FrontierPriceFrom $129Free CancellationRating
5.8
3,212 reviews
Search Frontier flights
DeltaPriceFrom $176Free CancellationRating
8.0
7,981 reviews
Search Delta flights
American AirlinesPriceFrom $196Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $215Free CancellationRating
8.0
4,246 reviews
Search Southwest flights
United AirlinesPriceFrom $216Free CancellationRating
7.4
8,925 reviews
Search United Airlines flights
Hawaiian AirlinesPriceFrom $222Free CancellationRating
7.8
2,664 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom $236Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights

  • Southwest Flights From Seattle to San Antonio

    Southwest operates around 3 flights from Seattle to San Antonio every week. The average price of these flights found in the last 72 hours has been $376, but momondo users have found Southwest deals from Seattle to San Antonio from as low as $215 round-trip. Southwest has been scored 8.0/10 in 4,246 reviews.

  • Alaska Airlines Flights From Seattle to San Antonio

    Alaska Airlines (8.0/10 from 10,000 reviews) operates around 4 flights from Seattle to San Antonio in any given week. The average Alaska Airlines airfare for this route is around $427, with deals from around $236 rare but found on momondo. Referenced prices are for round-trip Seattle to San Antonio flight searches in the last 72 hours.

Traveling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
New Braunfels
Kerrville
Boerne
Schertz
Pleasanton

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to San Antonio?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to San Antonio. momondo saves you time and could save you money on your trip.

Can I find flights from Seattle to San Antonio with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Seattle to San Antonio flights to just show those with flexible booking policies.

How can momondo help me find flights from Seattle to San Antonio?

momondo helps you find the best flight between Seattle and San Antonio by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Seattle to San Antonio right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to San Antonio from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your San Antonio trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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