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Cheap flights from Seattle to San Antonio from $85

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 10/26. 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
9:55 pm - 9:55 amSEA-SAT
10h 00m1 stop
Delta Logo
12:40 pm - 6:24 pmSAT-SEA
7h 44m1 stop
$206Delta
Find Deal
Sun, Oct 26 - Tue, Oct 28
Frontier Logo
7:00 am - 9:10 amSEA-SAT
24h 10m1 stop
Frontier Logo
8:20 pm - 12:30 amSAT-SEA
6h 10m1 stop
$208Frontier
Find Deal
Sat, Sep 27 - Sun, Sep 28
Southwest Logo
10:10 am - 10:20 pmSEA-SAT
10h 10m2 stops
Southwest Logo
9:00 pm - 1:10 amSAT-SEA
6h 10m1 stop
$211Southwest
Find Deal
Wed, Oct 22 - Sun, Oct 26
Southwest Logo
8:10 am - 5:45 pmSEA-SAT
7h 35m2 stops
Southwest Logo
1:45 pm - 10:55 pmSAT-SEA
11h 10m1 stop
$217Southwest
Find Deal
Wed, Dec 3 - Thu, Dec 11
American Airlines Logo
12:41 am - 9:46 amSEA-SAT
7h 05m1 stop
American Airlines Logo
6:04 am - 12:40 pmSAT-SEA
8h 36m1 stop
$227American Airlines
Find Deal
Fri, Nov 7 - Wed, Nov 12
Alaska Airlines Logo
5:59 pm - 12:04 amSEA-SAT
4h 05mnonstop
Alaska Airlines Logo
7:56 pm - 10:30 pmSAT-SEA
4h 34mnonstop
$237Alaska Airlines
Find Deal
Fri, Oct 10 - Tue, Oct 14
United Airlines Logo
11:10 pm - 8:38 amSEA-SAT
7h 28m1 stop
United Airlines Logo
4:21 pm - 11:15 pmSAT-SEA
8h 54m1 stop
$243United Airlines
Find Deal
Fri, Oct 10 - Wed, Oct 15
United Airlines Logo
1:00 pm - 10:28 pmSEA-SAT
7h 28m1 stop
United Airlines Logo
4:21 pm - 11:15 pmSAT-SEA
8h 54m2 stops
$247United Airlines
Find Deal
Tue, Oct 14 - Tue, Oct 21
Alaska Airlines Logo
5:59 pm - 12:04 amSEA-SAT
4h 05mnonstop
Alaska Airlines Logo
6:40 am - 9:09 amSAT-SEA
4h 29mnonstop
$257Alaska Airlines
Find Deal
Thu, Oct 9 - Mon, Oct 13
American Airlines Logo
12:41 am - 9:46 amSEA-SAT
7h 05m1 stop
American Airlines Logo
6:05 pm - 11:42 pmSAT-SEA
7h 37m1 stop
$258American Airlines
Find Deal
Tue, Nov 4 - Mon, Nov 10

Delta flights from Seattle to San Antonio

Our best Delta deals on Seattle to San Antonio flight tickets
Delta
Oct 26
SEA9:55 pmSeattle/Tacoma Intl
10h 00m
1 stop
SAT9:55 amSan Antonio
Oct 28
SAT12:40 pmSan Antonio
7h 44m
1 stop
SEA6:24 pmSeattle/Tacoma Intl
$206
Find similar
Delta
Mar 9
SEA12:40 amSeattle/Tacoma Intl
9h 39m
1 stop
SAT12:19 pmSan Antonio
Mar 11
SAT6:30 amSan Antonio
10h 15m
1 stop
SEA2:45 pmSeattle/Tacoma Intl
$215
Find similar
Delta
Oct 17
SEA5:00 pmSeattle/Tacoma Intl
5h 31m
1 stop
SAT12:31 amSan Antonio
Oct 22
SAT6:15 pmSan Antonio
7h 42m
1 stop
SEA11:57 pmSeattle/Tacoma Intl
$236
Find similar

Frontier flights from Seattle to San Antonio

Our best Frontier deals on Seattle to San Antonio flight tickets
Frontier
Sep 27
SEA7:00 amSeattle/Tacoma Intl
24h 10m
1 stop
SAT9:10 amSan Antonio
Sep 28
SAT8:20 pmSan Antonio
6h 10m
1 stop
SEA12:30 amSeattle/Tacoma Intl
$208
Find similar
Frontier
Sep 26
SEA6:12 amSeattle/Tacoma Intl
10h 18m
1 stop
SAT6:30 pmSan Antonio
Sep 28
SAT8:20 pmSan Antonio
6h 10m
1 stop
SEA12:30 amSeattle/Tacoma Intl
$210
Find similar
Frontier
Sep 27
SEA7:00 amSeattle/Tacoma Intl
24h 10m
1 stop
SAT9:10 amSan Antonio
Sep 28
SAT8:20 pmSan Antonio
6h 10m
1 stop
SEA12:30 amSeattle/Tacoma Intl
$212
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 September 17, 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

Sun 10/26

9:55 pm-9:55 am

1 stop10h 00m

San Antonio

Tue 10/28

12:40 pm-6:24 pm

1 stop7h 44m

$206

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Sat 9/27

7:00 am-9:10 am

1 stop24h 10m

San Antonio

Sun 9/28

8:20 pm-12:30 am

1 stop6h 10m

$208

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Wed 10/22

10:10 am-10:20 pm

2 stops10h 10m

San Antonio

Sun 10/26

9:00 pm-1:10 am

1 stop6h 10m

$211

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Wed 12/3

8:10 am-5:45 pm

2 stops7h 35m

San Antonio

Thu 12/11

1:45 pm-10:55 pm

1 stop11h 10m

$217

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Fri 11/7

12:41 am-9:46 am

1 stop7h 05m

San Antonio

Wed 11/12

6:04 am-12:40 pm

1 stop8h 36m

$227

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Fri 10/10

5:59 pm-12:04 am

Nonstop4h 05m

San Antonio

Tue 10/14

7:56 pm-10:30 pm

Nonstop4h 34m

$237

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Fri 10/10

11:10 pm-8:38 am

1 stop7h 28m

San Antonio

Wed 10/15

4:21 pm-11:15 pm

1 stop8h 54m

$243

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Tue 10/14

1:00 pm-10:28 pm

1 stop7h 28m

San Antonio

Tue 10/21

4:21 pm-11:15 pm

2 stops8h 54m

$247

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Thu 10/9

5:59 pm-12:04 am

Nonstop4h 05m

San Antonio

Mon 10/13

6:40 am-9:09 am

Nonstop4h 29m

$257

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Tue 11/4

12:41 am-9:46 am

1 stop7h 05m

San Antonio

Mon 11/10

6:05 pm-11:42 pm

1 stop7h 37m

$258

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 August, then book flights to San Antonio from Seattle during January instead. Flights to San Antonio in January, while not as cheap as those in August, still average around $274.

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 $385. 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 $476.

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 $447. 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 $352 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 $254 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 September 2025, prices for Seattle to San Antonio flights are approximately 1% 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

$158

Fastest flight time

3h 58m

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 $158. The best round-trip flight deal from Seattle to San Antonio found on momondo in the last 72 hours is $237.
The fastest flight from Seattle to San Antonio takes 3h 58m
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 05m.

  • 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
FrontierPriceFrom $129Free CancellationRating
5.8
3,173 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $130Free CancellationRating
6.3
8,023 reviews
Search Spirit Airlines flights
DeltaPriceFrom $176Free CancellationRating
7.9
7,961 reviews
Search Delta flights
American AirlinesPriceFrom $196Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $215Free CancellationRating
8.0
4,242 reviews
Search Southwest flights
United AirlinesPriceFrom $216Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
Hawaiian AirlinesPriceFrom $217Free CancellationRating
7.8
2,729 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom $237Free 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 $364, 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 4,242 reviews.

  • Alaska Airlines Flights From Seattle to San Antonio

    Alaska Airlines (8.0/10 from 10,000 reviews) operates around 3 flights from Seattle to San Antonio in any given week. The average Alaska Airlines airfare for this route is around $429, with deals from around $237 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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