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Cheap flights from San Antonio to Seattle from $118

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from San Antonio to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
3:19 pm - 9:42 amSAT  San Antonio-SEA Seattle/Tacoma Intl
20h 23m1 stop Las Vegas Harry Reid Intl
Frontier Logo
9:16 pm - 9:49 pmSEA  Seattle/Tacoma Intl-SAT San Antonio
22h 33m1 stop Las Vegas Harry Reid Intl
$248Frontier
Tue, Oct 6 - Thu, Oct 15
Frontier Logo
8:20 pm - 3:08 pmSAT  San Antonio-SEA Seattle/Tacoma Intl
20h 48m1 stop Denver Intl
Frontier Logo
9:16 pm - 9:49 pmSEA  Seattle/Tacoma Intl-SAT San Antonio
22h 33m1 stop Las Vegas Harry Reid Intl
$248Frontier
Tue, Sep 22 - Sun, Oct 25
Southwest Logo
8:00 pm - 12:55 amSAT  San Antonio-SEA Seattle/Tacoma Intl
6h 55m1 stop Phoenix Sky Harbor Intl
Southwest Logo
12:35 pm - 8:10 pmSEA  Seattle/Tacoma Intl-SAT San Antonio
5h 35m1 stop Dallas Love Field
$272Southwest
Thu, Nov 12 - Wed, Jan 6
Delta Logo
7:01 am - 12:40 pmSAT  San Antonio-SEA Seattle/Tacoma Intl
7h 39m1 stop Los Angeles
Delta Logo
5:35 am - 1:39 pmSEA  Seattle/Tacoma Intl-SAT San Antonio
6h 04m1 stop Salt Lake City
$277Delta
Thu, Nov 19 - Mon, Nov 23
Delta Logo
6:24 pm - 11:59 pmSAT  San Antonio-SEA Seattle/Tacoma Intl
7h 35m1 stop Minneapolis St Paul
Delta Logo
2:30 pm - 12:13 amSEA  Seattle/Tacoma Intl-SAT San Antonio
7h 43m1 stop Los Angeles
$277Delta
Fri, Oct 9 - Tue, Oct 13
Southwest Logo
6:10 am - 10:30 amSAT  San Antonio-SEA Seattle/Tacoma Intl
6h 20m1 stop Las Vegas Harry Reid Intl
Southwest Logo
5:30 am - 3:25 pmSEA  Seattle/Tacoma Intl-SAT San Antonio
7h 55m1 stop Las Vegas Harry Reid Intl
$277Southwest
Tue, Sep 22 - Sat, Sep 26
United Airlines Logo
9:48 am - 2:53 pmSAT  San Antonio-SEA Seattle/Tacoma Intl
7h 05m1 stop Houston George Bush Intcntl
United Airlines Logo
11:59 pm - 8:52 amSEA  Seattle/Tacoma Intl-SAT San Antonio
6h 53m1 stop Houston George Bush Intcntl
$277United Airlines
Wed, Oct 14 - Sat, Oct 17
United Airlines Logo
2:15 pm - 7:08 pmSAT  San Antonio-SEA Seattle/Tacoma Intl
6h 53m1 stop Houston George Bush Intcntl
United Airlines Logo
11:59 pm - 8:38 amSEA  Seattle/Tacoma Intl-SAT San Antonio
6h 39m1 stop Houston George Bush Intcntl
$277United Airlines
Mon, Sep 21 - Thu, Sep 24
American Airlines Logo
5:43 pm - 12:10 amSAT  San Antonio-SEA Seattle/Tacoma Intl
8h 27m1 stop Dallas/Fort Worth
American Airlines Logo
7:10 am - 4:09 pmSEA  Seattle/Tacoma Intl-SAT San Antonio
6h 59m1 stop Los Angeles
$277American Airlines
Sat, Oct 24 - Wed, Nov 4
American Airlines Logo
3:35 pm - 8:44 pmSAT  San Antonio-SEA Seattle/Tacoma Intl
7h 09m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
12:47 pm - 9:00 pmSEA  Seattle/Tacoma Intl-SAT San Antonio
6h 13m1 stop Dallas/Fort Worth
$277American Airlines
Thu, Jan 28 - Sat, Jan 30

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Frontier flights from San Antonio to Seattle

Our best Frontier deals on San Antonio to Seattle flight tickets
Frontier
Sep 22
SAT8:20 pmSan Antonio
20h 48m
1 stop
SEA3:08 pmSeattle/Tacoma Intl
Oct 25
SEA9:16 pmSeattle/Tacoma Intl
22h 33m
1 stop
SAT9:49 pmSan Antonio
$248
Frontier
Oct 20
SAT8:21 pmSan Antonio
20h 51m
1 stop
SEA3:12 pmSeattle/Tacoma Intl
Oct 27
SEA12:14 pmSeattle/Tacoma Intl
7h 20m
1 stop
SAT9:34 pmSan Antonio
$253
Frontier
Oct 22
SAT10:34 pmSan Antonio
13h 14m
1 stop
SEA9:48 amSeattle/Tacoma Intl
Oct 26
SEA9:16 pmSeattle/Tacoma Intl
22h 18m
1 stop
SAT9:34 pmSan Antonio
$254

Delta flights from San Antonio to Seattle

Our best Delta deals on San Antonio to Seattle flight tickets
Delta
Oct 1
SAT4:50 pmSan Antonio
9h 00m
1 stop
SEA11:50 pmSeattle/Tacoma Intl
Oct 7
SEA2:30 pmSeattle/Tacoma Intl
7h 43m
1 stop
SAT12:13 amSan Antonio
$277
Delta
Dec 11
SAT5:05 pmSan Antonio
7h 04m
1 stop
SEA10:09 pmSeattle/Tacoma Intl
Dec 16
SEA3:21 pmSeattle/Tacoma Intl
6h 45m
1 stop
SAT12:06 amSan Antonio
$297
Delta
Sep 14
SAT4:50 pmSan Antonio
7h 15m
1 stop
SEA10:05 pmSeattle/Tacoma Intl
Sep 18
SEA11:59 pmSeattle/Tacoma Intl
9h 40m
1 stop
SAT11:39 amSan Antonio
$307

momondo Fare Finder

 
Use the filters below to find and compare flights from San Antonio to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Tue 10/6

3:19 pm-9:42 am

1 stop20h 23m

Seattle/Tacoma Intl

Thu 10/15

9:16 pm-9:49 pm

1 stop22h 33m

$248

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Tue 9/22

8:20 pm-3:08 pm

1 stop20h 48m

Seattle/Tacoma Intl

Sun 10/25

9:16 pm-9:49 pm

1 stop22h 33m

$248
Quickest round-trip

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Thu 11/12

8:00 pm-12:55 am

1 stop6h 55m

Seattle/Tacoma Intl

Wed 1/6

12:35 pm-8:10 pm

1 stop5h 35m

$272

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Thu 11/19

7:01 am-12:40 pm

1 stop7h 39m

Seattle/Tacoma Intl

Mon 11/23

5:35 am-1:39 pm

1 stop6h 04m

$277

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Fri 10/9

6:24 pm-11:59 pm

1 stop7h 35m

Seattle/Tacoma Intl

Tue 10/13

2:30 pm-12:13 am

1 stop7h 43m

$277

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Tue 9/22

6:10 am-10:30 am

1 stop6h 20m

Seattle/Tacoma Intl

Sat 9/26

5:30 am-3:25 pm

1 stop7h 55m

$277

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Wed 10/14

9:48 am-2:53 pm

1 stop7h 05m

Seattle/Tacoma Intl

Sat 10/17

11:59 pm-8:52 am

1 stop6h 53m

$277

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Mon 9/21

2:15 pm-7:08 pm

1 stop6h 53m

Seattle/Tacoma Intl

Thu 9/24

11:59 pm-8:38 am

1 stop6h 39m

$277

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Sat 10/24

5:43 pm-12:10 am

1 stop8h 27m

Seattle/Tacoma Intl

Wed 11/4

7:10 am-4:09 pm

1 stop6h 59m

$277

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Thu 1/28

3:35 pm-8:44 pm

1 stop7h 09m

Seattle/Tacoma Intl

Sat 1/30

12:47 pm-9:00 pm

1 stop6h 13m

$277

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 Seattle from

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

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 typical price of a round-trip flight between San Antonio and Seattle?

Prices are currently low for flights on this route.

Typical prices usually range from $258 to $402.
The lowest price recently found on this route was $248.

What is the cheapest month to fly to Seattle?

In general, October is the cheapest month to fly from San Antonio to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $269. If you don’t want to visit Seattle in October, then you should wait until April to fly from San Antonio, when ticket prices are also cheap, with an average price of $286.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from San Antonio is on a Thursday. momondo users have found tickets for Thursday departures for as low as $430. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Saturday is the most expensive day to depart from San Antonio because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $548.

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

Flying to Seattle from San Antonio in the morning is the least expensive time of day to depart. momondo users have found prices as low as $478 when looking at flights departing in the morning. Flights to Seattle are more costly in the evening, with an average ticket price of $636. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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

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

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

You are more likely to see cheaper flights to Seattle from San Antonio when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $337 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from San Antonio for as low as $289 on momondo.

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

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

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

As of September 2026, prices for San Antonio to Seattle flights are approximately 2% more expensive when compared to flights at the same time last year.

When to book flights from San Antonio to Seattle

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

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

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

Best Price Found

$118

Fastest flight time

4h 24m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from San Antonio in the past 72 hours is $118. The best round-trip flight deal from San Antonio to Seattle found on momondo in the last 72 hours is $248.
The fastest flight from San Antonio to Seattle takes 4h 24m
Direct flights go from San Antonio to Seattle every day.
There is 1 airport in Seattle. From San Antonio there are direct flights to Seattle/Tacoma Intl (SEA).
Search flight deals

Frequently asked questions about flying from San Antonio to Seattle

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

    A flight from San Antonio to Seattle/Tacoma Intl will travel around 1785.1 mi. By plane, this route typically takes 4h 24m.

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

    Prices for flights from San Antonio Airport to Seattle/Tacoma Intl Airport were last updated today.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Antonio Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

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

Best airlines flying from San Antonio to Seattle

Compare and see reviews for airlines that fly from San Antonio to Seattle with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $80Free CancellationRating
5.6
2,618 reviews
Search Frontier flights
Hawaiian AirlinesPriceFrom $118Free CancellationRating
7.8
2,814 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $176Free CancellationRating
7.8
8,558 reviews
Search Delta flights
American AirlinesPriceFrom $196Free CancellationRating
7.1
12,041 reviews
Search American Airlines flights
United AirlinesPriceFrom $214Free CancellationRating
7.4
10,173 reviews
Search United Airlines flights
SouthwestPriceFrom $216Free CancellationRating
8.0
4,200 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $217Free CancellationRating
7.9
12,884 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From San Antonio to Seattle

    Alaska Airlines operates around 1 flight from San Antonio to Seattle every week. The average price of these flights found in the last 72 hours has been $411, but momondo users have found Alaska Airlines deals from San Antonio to Seattle from as low as $217 round-trip. Alaska Airlines has been scored 7.9/10 in 12,884 reviews.

  • United Airlines Flights From San Antonio to Seattle

    $214 is the best United Airlines flight deal from San Antonio to Seattle found on momondo over the last 72 hours. The average United Airlines ticket price found was closer to $362, however, with flight time and availability significantly affecting the price. United Airlines (7.4/10 from 10,173 user reviews) flies into Seattle from San Antonio 2 times in an average week so prices can vary.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Kent
Olympia
Redmond
Lakewood
Federal Way
Fife
Tukwila
Puyallup
Lynnwood
Cle Elum
Marysville
Kirkland
Centralia
Lacey
Shoreline

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle from San Antonio.

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

momondo does allow users to show only those flights to Seattle from San Antonio which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search for San Antonio to Seattle flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Of course. momondo tracks the price of San Antonio to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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