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Cheap flights from San Antonio to Seattle from $55

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Antonio to Seattle departing on 2/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:35 am - 11:39 am
SAT
-
SEA
27h 04m2 stops
Multiple Airlines Logo
12:34 pm - 7:33 pm
SEA
-
SAT
28h 59m1 stop
$196Multiple Airlines
Fri, Feb 6 - Sun, Feb 8
Alaska Airlines Logo
6:46 pm - 9:22 pm
SAT
-
SEA
4h 36mnonstop
Alaska Airlines Logo
11:40 am - 5:45 pm
SEA
-
SAT
4h 05mnonstop
$197Alaska Airlines
Tue, Jan 20 - Tue, Jan 27
Frontier Logo
8:25 pm - 10:55 am
SAT
-
SEA
16h 30m1 stop
Frontier Logo
12:30 pm - 4:41 pm
SEA
-
SAT
26h 11m1 stop
$199Frontier
Thu, Feb 12 - Mon, Feb 16
Alaska Airlines Logo
6:46 pm - 9:22 pm
SAT
-
SEA
4h 36mnonstop
Alaska Airlines Logo
11:40 am - 5:45 pm
SEA
-
SAT
4h 05mnonstop
$207Alaska Airlines
Wed, Jan 14 - Fri, Jan 23
Frontier Logo
11:17 am - 2:43 pm
SAT
-
SEA
29h 26m1 stop
Frontier Logo
1:09 pm - 3:40 pm
SEA
-
SAT
24h 31m1 stop
$209Frontier
Fri, Jan 16 - Sun, Jan 18
Frontier Logo
9:59 pm - 11:39 am
SAT
-
SEA
15h 40m1 stop
Frontier Logo
12:34 pm - 7:33 pm
SEA
-
SAT
28h 59m1 stop
$210Frontier
Fri, Feb 6 - Sun, Feb 8
Delta Logo
7:00 am - 12:57 pm
SAT
-
SEA
7h 57m1 stop
Delta Logo
5:30 am - 1:48 pm
SEA
-
SAT
6h 18m1 stop
$215Delta
Wed, Jan 21 - Tue, Jan 27
Alaska Airlines Logo
6:46 pm - 9:22 pm
SAT
-
SEA
4h 36mnonstop
Alaska Airlines Logo
11:40 am - 5:45 pm
SEA
-
SAT
4h 05mnonstop
$217Alaska Airlines
Wed, Jan 21 - Wed, Jan 28
Multiple Airlines Logo
8:25 pm - 10:55 am
SAT
-
SEA
16h 30m1 stop
Multiple Airlines Logo
9:14 pm - 9:30 am
SEA
-
SAT
34h 16m2 stops
$219Multiple Airlines
Thu, Feb 12 - Mon, Feb 16
Multiple Airlines Logo
8:25 pm - 10:55 am
SAT
-
SEA
16h 30m1 stop
Multiple Airlines Logo
11:09 am - 5:10 pm
SEA
-
SAT
4h 01mnonstop
$225Multiple Airlines
Thu, Feb 19 - Wed, Feb 25

Alaska Airlines flights from San Antonio to Seattle

Our best Alaska Airlines deals on San Antonio to Seattle flight tickets
Alaska Airlines
Jan 20
SAT6:46 pmSan Antonio
4h 36m
SEA9:22 pmSeattle/Tacoma Intl
Jan 27
SEA11:40 amSeattle/Tacoma Intl
4h 05m
SAT5:45 pmSan Antonio
$197
Find similar
Alaska Airlines
Jan 14
SAT6:46 pmSan Antonio
4h 36m
SEA9:22 pmSeattle/Tacoma Intl
Jan 23
SEA11:40 amSeattle/Tacoma Intl
4h 05m
SAT5:45 pmSan Antonio
$207
Find similar
Alaska Airlines
Jan 21
SAT6:46 pmSan Antonio
4h 36m
SEA9:22 pmSeattle/Tacoma Intl
Jan 28
SEA11:40 amSeattle/Tacoma Intl
4h 05m
SAT5:45 pmSan Antonio
$217
Find similar

Southwest flights from San Antonio to Seattle

Our best Southwest deals on San Antonio to Seattle flight tickets
Southwest
Jan 19
SAT6:10 amSan Antonio
6h 15m
1 stop
SEA10:25 amSeattle/Tacoma Intl
Jan 22
SEA9:55 amSeattle/Tacoma Intl
10h 00m
1 stop
SAT9:55 pmSan Antonio
$242
Find similar
Southwest
Jan 8
SAT5:45 pmSan Antonio
6h 50m
1 stop
SEA10:35 pmSeattle/Tacoma Intl
Jan 12
SEA2:05 pmSeattle/Tacoma Intl
5h 50m
1 stop
SAT9:55 pmSan Antonio
$256
Find similar
Southwest
Jan 21
SAT10:10 amSan Antonio
9h 40m
2 stops
SEA5:50 pmSeattle/Tacoma Intl
Jan 28
SEA6:05 amSeattle/Tacoma Intl
9h 35m
2 stops
SAT5:40 pmSan Antonio
$288
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from San Antonio to Seattle 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 23, 2025.
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

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Fri 2/6

10:35 am-11:39 am

2 stops27h 04m

Seattle/Tacoma Intl

Sun 2/8

12:34 pm-7:33 pm

1 stop28h 59m

$196

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Tue 1/20

6:46 pm-9:22 pm

Nonstop4h 36m

Seattle/Tacoma Intl

Tue 1/27

11:40 am-5:45 pm

Nonstop4h 05m

$197

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Thu 2/12

8:25 pm-10:55 am

1 stop16h 30m

Seattle/Tacoma Intl

Mon 2/16

12:30 pm-4:41 pm

1 stop26h 11m

$199

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Wed 1/14

6:46 pm-9:22 pm

Nonstop4h 36m

Seattle/Tacoma Intl

Fri 1/23

11:40 am-5:45 pm

Nonstop4h 05m

$207

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Fri 1/16

11:17 am-2:43 pm

1 stop29h 26m

Seattle/Tacoma Intl

Sun 1/18

1:09 pm-3:40 pm

1 stop24h 31m

$209

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Fri 2/6

9:59 pm-11:39 am

1 stop15h 40m

Seattle/Tacoma Intl

Sun 2/8

12:34 pm-7:33 pm

1 stop28h 59m

$210

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Wed 1/21

7:00 am-12:57 pm

1 stop7h 57m

Seattle/Tacoma Intl

Tue 1/27

5:30 am-1:48 pm

1 stop6h 18m

$215

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Wed 1/21

6:46 pm-9:22 pm

Nonstop4h 36m

Seattle/Tacoma Intl

Wed 1/28

11:40 am-5:45 pm

Nonstop4h 05m

$217

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Thu 2/12

8:25 pm-10:55 am

1 stop16h 30m

Seattle/Tacoma Intl

Mon 2/16

9:14 pm-9:30 am

2 stops34h 16m

$219

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Thu 2/19

8:25 pm-10:55 am

1 stop16h 30m

Seattle/Tacoma Intl

Wed 2/25

11:09 am-5:10 pm

Nonstop4h 01m

$225

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 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 $266. If you don’t want to visit Seattle in October, then you should wait until September to fly from San Antonio, when ticket prices are also cheap, with an average price of $267.

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 $451. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday 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 $595.

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 $550. 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 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 $322 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/Tacoma Intl flights?

There are 4 cabin classes available to choose from on San Antonio to Seattle/Tacoma Intl 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 December 2025, prices for San Antonio to Seattle flights are approximately 2% cheaper 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

$250

Fastest flight time

4h 35m

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 $250. The best round-trip flight deal from San Antonio to Seattle found on momondo in the last 72 hours is $441.
The fastest flight from San Antonio to Seattle takes 4h 35m
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

  • 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 35m.

  • 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
Spirit AirlinesPriceFrom $87Free CancellationRating
6.3
8,194 reviews
Search Spirit Airlines flights
FrontierPriceFrom $101Free CancellationRating
5.8
3,073 reviews
Search Frontier flights
DeltaPriceFrom $178Free CancellationRating
7.9
8,015 reviews
Search Delta flights
SouthwestPriceFrom $194Free CancellationRating
8.0
4,256 reviews
Search Southwest flights
American AirlinesPriceFrom $194Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights
United AirlinesPriceFrom $214Free CancellationRating
7.4
9,109 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $236Free CancellationRating
8.0
11,517 reviews
Search Alaska Airlines flights
Hawaiian AirlinesPriceFrom $237Free CancellationRating
7.8
2,820 reviews
Search Hawaiian Airlines flights

  • Alaska Airlines Flights From San Antonio to Seattle

    Alaska Airlines operates around 8 flights from San Antonio to Seattle every week. The average price of these flights found in the last 72 hours has been $401, but momondo users have found Alaska Airlines deals from San Antonio to Seattle from as low as $236 round-trip. Alaska Airlines has been scored 8.0/10 in 11,518 reviews.

  • Hawaiian Airlines Flights From San Antonio to Seattle

    $237 is the best Hawaiian Airlines flight deal from San Antonio to Seattle found on momondo over the last 72 hours. The average Hawaiian Airlines ticket price found was closer to $377, however, with flight time and availability significantly affecting the price. Hawaiian Airlines (7.8/10 from 2,820 user reviews) flies into Seattle from San Antonio 11 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
Olympia
Lynnwood
Kent
Marysville
Puyallup
Redmond
Tukwila
Federal Way
Cle Elum
Lakewood
Fife
Centralia
Westport
Kirkland
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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