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Cheap flights from Seattle to San Antonio from $61

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 1/29. 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

Enter your travel dates to find the best prices.
Delta Logo
5:30 am - 1:35 pm
SEA
-
SAT
6h 05m1 stop
Delta Logo
5:55 pm - 12:03 am
SAT
-
SEA
8h 08m1 stop
$206Delta
Fri, Mar 20 - Tue, Mar 24
Delta Logo
8:30 am - 5:04 pm
SEA
-
SAT
6h 34m1 stop
Delta Logo
5:59 pm - 12:01 am
SAT
-
SEA
8h 02m1 stop
$215Delta
Fri, Mar 6 - Sun, Mar 8
Alaska Airlines Logo
11:40 am - 5:45 pm
SEA
-
SAT
4h 05mnonstop
Alaska Airlines Logo
6:06 pm - 8:43 pm
SAT
-
SEA
4h 37mnonstop
$217Alaska Airlines
Tue, Feb 10 - Sun, Feb 15
Alaska Airlines Logo
11:40 am - 5:45 pm
SEA
-
SAT
4h 05mnonstop
Alaska Airlines Logo
6:46 pm - 9:22 pm
SAT
-
SEA
4h 36mnonstop
$227Alaska Airlines
Sat, Jan 24 - Fri, Jan 30
Delta Logo
2:02 pm - 11:43 pm
SEA
-
SAT
7h 41m1 stop
Delta Logo
7:00 am - 12:58 pm
SAT
-
SEA
7h 58m1 stop
$228Delta
Tue, Feb 10 - Sun, Feb 15
Multiple Airlines Logo
11:40 am - 5:45 pm
SEA
-
SAT
4h 05mnonstop
Multiple Airlines Logo
9:41 pm - 6:50 pm
SAT
-
SEA
23h 09m1 stop
$234Multiple Airlines
Fri, Jan 30 - Mon, Feb 2
Multiple Airlines Logo
9:25 pm - 12:25 pm
SEA
-
SAT
13h 00m1 stop
Multiple Airlines Logo
6:46 pm - 9:22 pm
SAT
-
SEA
4h 36mnonstop
$235Multiple Airlines
Thu, Jan 22 - Thu, Jan 29
Frontier Logo
9:10 pm - 3:40 pm
SEA
-
SAT
16h 30m2 stops
Frontier Logo
8:24 pm - 11:19 am
SAT
-
SEA
16h 55m1 stop
$236Frontier
Thu, Jan 15 - Thu, Jan 22
Alaska Airlines Logo
11:40 am - 5:45 pm
SEA
-
SAT
4h 05mnonstop
Alaska Airlines Logo
6:46 pm - 9:22 pm
SAT
-
SEA
4h 36mnonstop
$237Alaska Airlines
Thu, Jan 22 - Mon, Jan 26
United Airlines Logo
12:25 pm - 8:44 pm
SEA
-
SAT
6h 19m1 stop
United Airlines Logo
1:20 pm - 9:12 pm
SAT
-
SEA
9h 52m2 stops
$238United Airlines
Sat, Jan 24 - Sat, Jan 31

United Airlines flights from Seattle to San Antonio

Our best United Airlines deals on Seattle to San Antonio flight tickets
United Airlines
Jan 24
SEA12:25 pmSeattle/Tacoma Intl
6h 19m
1 stop
SAT8:44 pmSan Antonio
Jan 31
SAT1:20 pmSan Antonio
9h 52m
2 stops
SEA9:12 pmSeattle/Tacoma Intl
$238
Find similar
United Airlines
Jan 24
SEA12:25 pmSeattle/Tacoma Intl
8h 32m
2 stops
SAT10:57 pmSan Antonio
Jan 31
SAT2:15 pmSan Antonio
9h 00m
2 stops
SEA9:15 pmSeattle/Tacoma Intl
$243
Find similar
United Airlines
Mar 19
SEA11:59 pmSeattle/Tacoma Intl
6h 39m
1 stop
SAT8:38 amSan Antonio
Mar 24
SAT1:21 pmSan Antonio
9h 37m
2 stops
SEA8:58 pmSeattle/Tacoma Intl
$261
Find similar

Southwest flights from Seattle to San Antonio

Our best Southwest deals on Seattle to San Antonio flight tickets
Southwest
Feb 4
SEA5:15 amSeattle/Tacoma Intl
9h 15m
2 stops
SAT4:30 pmSan Antonio
Feb 8
SAT6:10 amSan Antonio
6h 35m
1 stop
SEA10:45 amSeattle/Tacoma Intl
$263
Find similar
Southwest
Jan 25
SEA8:35 amSeattle/Tacoma Intl
8h 25m
1 stop
SAT7:00 pmSan Antonio
Jan 26
SAT2:45 pmSan Antonio
9h 05m
2 stops
SEA9:50 pmSeattle/Tacoma Intl
$293
Find similar
Southwest
Jan 8
SEA5:15 amSeattle/Tacoma Intl
9h 15m
2 stops
SAT4:30 pmSan Antonio
Jan 12
SAT2:45 pmSan Antonio
9h 50m
2 stops
SEA10:35 pmSeattle/Tacoma Intl
$389
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 December 28, 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

Fri 3/20

5:30 am-1:35 pm

1 stop6h 05m

San Antonio

Tue 3/24

5:55 pm-12:03 am

1 stop8h 08m

$206

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Fri 3/6

8:30 am-5:04 pm

1 stop6h 34m

San Antonio

Sun 3/8

5:59 pm-12:01 am

1 stop8h 02m

$215

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Tue 2/10

11:40 am-5:45 pm

Nonstop4h 05m

San Antonio

Sun 2/15

6:06 pm-8:43 pm

Nonstop4h 37m

$217

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Sat 1/24

11:40 am-5:45 pm

Nonstop4h 05m

San Antonio

Fri 1/30

6:46 pm-9:22 pm

Nonstop4h 36m

$227

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Tue 2/10

2:02 pm-11:43 pm

1 stop7h 41m

San Antonio

Sun 2/15

7:00 am-12:58 pm

1 stop7h 58m

$228

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Fri 1/30

11:40 am-5:45 pm

Nonstop4h 05m

San Antonio

Mon 2/2

9:41 pm-6:50 pm

1 stop23h 09m

$234

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Thu 1/22

9:25 pm-12:25 pm

1 stop13h 00m

San Antonio

Thu 1/29

6:46 pm-9:22 pm

Nonstop4h 36m

$235

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Thu 1/15

9:10 pm-3:40 pm

2 stops16h 30m

San Antonio

Thu 1/22

8:24 pm-11:19 am

1 stop16h 55m

$236

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Thu 1/22

11:40 am-5:45 pm

Nonstop4h 05m

San Antonio

Mon 1/26

6:46 pm-9:22 pm

Nonstop4h 36m

$237

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Sat 1/24

12:25 pm-8:44 pm

1 stop6h 19m

San Antonio

Sat 1/31

1:20 pm-9:12 pm

2 stops9h 52m

$238

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 September instead. Flights to San Antonio in September, while not as cheap as those in August, still average around $257.

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 Monday when prices can be found for as low as $347. 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 $467.

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 in the afternoon. momondo users have found flights departing from Seattle to San Antonio in the afternoon for as low as $277. 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 $415. 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 $343 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 $247 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 December 2025, prices for Seattle to San Antonio flights are approximately 9% 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

$268

Fastest flight time

4h 01m

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 $268. The best round-trip flight deal from Seattle to San Antonio found on momondo in the last 72 hours is $254.
The fastest flight from Seattle to San Antonio takes 4h 01m
Direct flights go from Seattle to San Antonio every day.
There is 1 airport in San Antonio. From Seattle there are direct flights to 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 01m.

  • 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 $163Free CancellationRating
6.3
8,214 reviews
Search Spirit Airlines flights
FrontierPriceFrom $164Free CancellationRating
5.7
3,064 reviews
Search Frontier flights
DeltaPriceFrom $172Free CancellationRating
7.9
8,016 reviews
Search Delta flights
American AirlinesPriceFrom $180Free CancellationRating
7.2
11,071 reviews
Search American Airlines flights
SouthwestPriceFrom $194Free CancellationRating
8.0
4,250 reviews
Search Southwest flights
Hawaiian AirlinesPriceFrom $197Free CancellationRating
7.8
2,820 reviews
Search Hawaiian Airlines flights
United AirlinesPriceFrom $201Free CancellationRating
7.4
9,114 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $237Free CancellationRating
8.0
11,554 reviews
Search Alaska Airlines flights

  • Southwest Flights From Seattle to San Antonio

    Southwest operates around 1 flight from Seattle to San Antonio every week. The average price of these flights found in the last 72 hours has been $331, but momondo users have found Southwest deals from Seattle to San Antonio from as low as $194 round-trip. Southwest has been scored 8.0/10 in 4,250 reviews.

  • Alaska Airlines Flights From Seattle to San Antonio

    Alaska Airlines (8.0/10 from 11,555 reviews) operates around 7 flights from Seattle to San Antonio in any given week. The average Alaska Airlines airfare for this route is around $408, 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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