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Cheap flights from Seattle to San Antonio from $62

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 1/9. 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.
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
$213Multiple Airlines
Sun, Feb 1 - Fri, Feb 6
Frontier Logo
1:25 pm - 12:17 am
SEA
-
SAT
8h 52m1 stop
Frontier Logo
5:03 pm - 4:29 pm
SAT
-
SEA
25h 26m1 stop
$214Frontier
Thu, Jan 1 - Thu, Jan 8
Delta Logo
1:30 pm - 12:13 am
SEA
-
SAT
8h 43m1 stop
Delta Logo
5:56 pm - 12:03 am
SAT
-
SEA
8h 07m1 stop
$215Delta
Mon, Mar 16 - Mon, Mar 23
Delta Logo
9:25 am - 5:25 pm
SEA
-
SAT
6h 00m1 stop
Delta Logo
7:00 am - 8:48 pm
SAT
-
SEA
15h 48m2 stops
$216Delta
Fri, Jan 9 - Wed, Jan 14
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
$217Alaska Airlines
Thu, Jan 8 - Tue, Jan 13
Delta Logo
1:30 pm - 11:43 pm
SEA
-
SAT
8h 13m1 stop
Delta Logo
4:40 pm - 10:24 pm
SAT
-
SEA
7h 44m1 stop
$218Delta
Sun, Jan 11 - Mon, Jan 12
Multiple Airlines Logo
6:33 pm - 5:37 am
SEA
-
SAT
9h 04m1 stop
Multiple Airlines Logo
8:53 pm - 11:09 am
SAT
-
SEA
16h 16m2 stops
$222Multiple Airlines
Mon, Jan 5 - Thu, Jan 15
Delta Logo
1:35 pm - 9:28 pm
SEA
-
SAT
5h 53m1 stop
Delta Logo
7:00 am - 8:48 pm
SAT
-
SEA
15h 48m2 stops
$224Delta
Sat, Jan 10 - Thu, Jan 15
Delta Logo
7:25 am - 9:28 pm
SEA
-
SAT
12h 03m2 stops
Delta Logo
6:20 pm - 11:22 pm
SAT
-
SEA
7h 02m1 stop
$225Delta
Wed, Jan 7 - Sun, Jan 11
Delta Logo
7:25 am - 11:43 pm
SEA
-
SAT
14h 18m2 stops
Delta Logo
6:20 pm - 11:22 pm
SAT
-
SEA
7h 02m1 stop
$226Delta
Wed, Jan 14 - Thu, Jan 15

Frontier flights from Seattle to San Antonio

Our best Frontier deals on Seattle to San Antonio flight tickets
Frontier
Jan 1
SEA1:25 pmSeattle/Tacoma Intl
8h 52m
1 stop
SAT12:17 amSan Antonio
Jan 8
SAT5:03 pmSan Antonio
25h 26m
1 stop
SEA4:29 pmSeattle/Tacoma Intl
$214
Find similar
Frontier
Dec 25
SEA1:25 pmSeattle/Tacoma Intl
8h 52m
1 stop
SAT12:17 amSan Antonio
Jan 8
SAT11:55 amSan Antonio
7h 42m
1 stop
SEA5:37 pmSeattle/Tacoma Intl
$233
Find similar
Frontier
Dec 29
SEA7:48 pmSeattle/Tacoma Intl
11h 35m
1 stop
SAT9:23 amSan Antonio
Jan 5
SAT2:01 pmSan Antonio
29h 50m
1 stop
SEA5:51 pmSeattle/Tacoma Intl
$242
Find similar

American Airlines flights from Seattle to San Antonio

Our best American Airlines deals on Seattle to San Antonio flight tickets
American Airlines
Dec 17
SEA7:15 amSeattle/Tacoma Intl
6h 20m
1 stop
SAT3:35 pmSan Antonio
Jan 1
SAT6:02 amSan Antonio
7h 13m
1 stop
SEA11:15 amSeattle/Tacoma Intl
$256
Find similar
American Airlines
Jan 4
SEA11:59 pmSeattle/Tacoma Intl
6h 19m
1 stop
SAT8:18 amSan Antonio
Jan 17
SAT11:38 amSan Antonio
8h 07m
1 stop
SEA5:45 pmSeattle/Tacoma Intl
$271
Find similar
American Airlines
Dec 17
SEA5:18 amSeattle/Tacoma Intl
8h 17m
1 stop
SAT3:35 pmSan Antonio
Jan 1
SAT6:02 amSan Antonio
7h 13m
1 stop
SEA11:15 amSeattle/Tacoma Intl
$278
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 4, 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 2/1

9:25 pm-12:25 pm

1 stop13h 00m

San Antonio

Fri 2/6

6:46 pm-9:22 pm

Nonstop4h 36m

$213

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Thu 1/1

1:25 pm-12:17 am

1 stop8h 52m

San Antonio

Thu 1/8

5:03 pm-4:29 pm

1 stop25h 26m

$214

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Mon 3/16

1:30 pm-12:13 am

1 stop8h 43m

San Antonio

Mon 3/23

5:56 pm-12:03 am

1 stop8h 07m

$215

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Fri 1/9

9:25 am-5:25 pm

1 stop6h 00m

San Antonio

Wed 1/14

7:00 am-8:48 pm

2 stops15h 48m

$216

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Thu 1/8

11:40 am-5:45 pm

Nonstop4h 05m

San Antonio

Tue 1/13

6:46 pm-9:22 pm

Nonstop4h 36m

$217

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Sun 1/11

1:30 pm-11:43 pm

1 stop8h 13m

San Antonio

Mon 1/12

4:40 pm-10:24 pm

1 stop7h 44m

$218

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Mon 1/5

6:33 pm-5:37 am

1 stop9h 04m

San Antonio

Thu 1/15

8:53 pm-11:09 am

2 stops16h 16m

$222

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Sat 1/10

1:35 pm-9:28 pm

1 stop5h 53m

San Antonio

Thu 1/15

7:00 am-8:48 pm

2 stops15h 48m

$224

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Wed 1/7

7:25 am-9:28 pm

2 stops12h 03m

San Antonio

Sun 1/11

6:20 pm-11:22 pm

1 stop7h 02m

$225

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Wed 1/14

7:25 am-11:43 pm

2 stops14h 18m

San Antonio

Thu 1/15

6:20 pm-11:22 pm

1 stop7h 02m

$226

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 Wednesday when prices can be found for as low as $374. 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 $427. 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 $345 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 3% 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

$148

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 $148. The best round-trip flight deal from Seattle to San Antonio found on momondo in the last 72 hours is $284.
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 02m.

  • 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 $130Free CancellationRating
6.3
8,161 reviews
Search Spirit Airlines flights
FrontierPriceFrom $164Free CancellationRating
5.8
3,092 reviews
Search Frontier flights
DeltaPriceFrom $176Free CancellationRating
7.9
8,011 reviews
Search Delta flights
American AirlinesPriceFrom $196Free CancellationRating
7.2
11,043 reviews
Search American Airlines flights
SouthwestPriceFrom $196Free CancellationRating
8.0
4,252 reviews
Search Southwest flights
Hawaiian AirlinesPriceFrom $197Free CancellationRating
7.8
2,815 reviews
Search Hawaiian Airlines flights
United AirlinesPriceFrom $201Free CancellationRating
7.4
9,063 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $237Free CancellationRating
8.0
11,396 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From Seattle to San Antonio

    Alaska Airlines operates around 6 flights from Seattle to San Antonio every week. The average price of these flights found in the last 72 hours has been $423, but momondo users have found Alaska Airlines deals from Seattle to San Antonio from as low as $237 round-trip. Alaska Airlines has been scored 8.0/10 in 11,396 reviews.

  • Hawaiian Airlines Flights From Seattle to San Antonio

    Hawaiian Airlines (7.8/10 from 2,815 reviews) operates around 9 flights from Seattle to San Antonio in any given week. The average Hawaiian Airlines airfare for this route is around $377, with deals from around $197 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.
Start using Trips
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