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Cheap flights from San Antonio to Seattle from $63

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 1/25. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
2:01 pm - 12:30 pmSAT-SEA
24h 29m2 stops
Frontier Logo
7:48 pm - 4:15 pmSEA-SAT
18h 27m1 stop
$205Frontier
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Tue, Dec 30 - Mon, Jan 5
Delta Logo
2:42 pm - 8:46 pmSAT-SEA
8h 04m1 stop
Delta Logo
2:02 pm - 11:43 pmSEA-SAT
7h 41m1 stop
$206Delta
Find Deal
Wed, Jan 28 - Sun, Feb 1
Frontier Logo
6:45 am - 12:30 pmSAT-SEA
7h 45m1 stop
Frontier Logo
2:54 pm - 12:17 amSEA-SAT
7h 23m1 stop
$208Frontier
Find Deal
Fri, Dec 19 - Sat, Jan 3
Multiple Airlines Logo
6:35 am - 5:51 pmSAT-SEA
13h 16m2 stops
Multiple Airlines Logo
7:23 pm - 11:49 amSEA-SAT
14h 26m1 stop
$209Multiple Airlines
Find Deal
Tue, Jan 6 - Thu, Jan 8
Southwest Logo
6:25 am - 12:05 pmSAT-SEA
7h 40m1 stop
Southwest Logo
6:05 am - 2:00 pmSEA-SAT
5h 55m1 stop
$215Southwest
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Fri, Jan 9 - Mon, Jan 12
Alaska Airlines Logo
6:46 pm - 9:22 pmSAT-SEA
4h 36mnonstop
Alaska Airlines Logo
11:40 am - 5:45 pmSEA-SAT
4h 05mnonstop
$217Alaska Airlines
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Wed, Jan 28 - Sun, Feb 1
Frontier Logo
7:56 pm - 11:53 amSAT-SEA
17h 57m1 stop
Frontier Logo
2:54 pm - 9:23 amSEA-SAT
40h 29m2 stops
$226Frontier
Find Deal
Thu, Dec 11 - Tue, Dec 23
Frontier Logo
7:56 pm - 11:53 amSAT-SEA
17h 57m1 stop
Frontier Logo
2:54 pm - 1:14 pmSEA-SAT
20h 20m1 stop
$227Frontier
Find Deal
Thu, Dec 11 - Tue, Dec 23
Frontier Logo
6:45 am - 12:30 pmSAT-SEA
7h 45m1 stop
Frontier Logo
2:54 pm - 12:17 amSEA-SAT
7h 23m1 stop
$228Frontier
Find Deal
Sun, Dec 21 - Sat, Jan 3
Frontier Logo
6:45 am - 1:54 pmSAT-SEA
33h 09m2 stops
Frontier Logo
7:48 pm - 4:15 pmSEA-SAT
18h 27m1 stop
$229Frontier
Find Deal
Mon, Dec 29 - Mon, Jan 5

Frontier flights from San Antonio to Seattle

Our best Frontier deals on San Antonio to Seattle flight tickets
Frontier
Dec 30
SAT2:01 pmSan Antonio
24h 29m
2 stops
SEA12:30 pmSeattle/Tacoma Intl
Jan 5
SEA7:48 pmSeattle/Tacoma Intl
18h 27m
1 stop
SAT4:15 pmSan Antonio
$205
Find similar
Frontier
Dec 19
SAT6:45 amSan Antonio
7h 45m
1 stop
SEA12:30 pmSeattle/Tacoma Intl
Jan 3
SEA2:54 pmSeattle/Tacoma Intl
7h 23m
1 stop
SAT12:17 amSan Antonio
$208
Find similar
Frontier
Dec 11
SAT7:56 pmSan Antonio
17h 57m
1 stop
SEA11:53 amSeattle/Tacoma Intl
Dec 23
SEA2:54 pmSeattle/Tacoma Intl
40h 29m
2 stops
SAT9:23 amSan Antonio
$226
Find similar

Delta flights from San Antonio to Seattle

Our best Delta deals on San Antonio to Seattle flight tickets
Delta
Jan 28
SAT2:42 pmSan Antonio
8h 04m
1 stop
SEA8:46 pmSeattle/Tacoma Intl
Feb 1
SEA2:02 pmSeattle/Tacoma Intl
7h 41m
1 stop
SAT11:43 pmSan Antonio
$206
Find similar
Delta
May 20
SAT4:10 pmSan Antonio
8h 07m
1 stop
SEA10:17 pmSeattle/Tacoma Intl
Jun 3
SEA12:00 pmSeattle/Tacoma Intl
9h 18m
1 stop
SAT11:18 pmSan Antonio
$247
Find similar
Delta
Dec 12
SAT6:00 pmSan Antonio
8h 20m
1 stop
SEA12:20 amSeattle/Tacoma Intl
Dec 15
SEA12:45 pmSeattle/Tacoma Intl
9h 04m
1 stop
SAT11:49 pmSan Antonio
$256
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 November 26, 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

Tue 12/30

2:01 pm-12:30 pm

2 stops24h 29m

Seattle/Tacoma Intl

Mon 1/5

7:48 pm-4:15 pm

1 stop18h 27m

$205

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Wed 1/28

2:42 pm-8:46 pm

1 stop8h 04m

Seattle/Tacoma Intl

Sun 2/1

2:02 pm-11:43 pm

1 stop7h 41m

$206

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Fri 12/19

6:45 am-12:30 pm

1 stop7h 45m

Seattle/Tacoma Intl

Sat 1/3

2:54 pm-12:17 am

1 stop7h 23m

$208

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Tue 1/6

6:35 am-5:51 pm

2 stops13h 16m

Seattle/Tacoma Intl

Thu 1/8

7:23 pm-11:49 am

1 stop14h 26m

$209

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Fri 1/9

6:25 am-12:05 pm

1 stop7h 40m

Seattle/Tacoma Intl

Mon 1/12

6:05 am-2:00 pm

1 stop5h 55m

$215

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Wed 1/28

6:46 pm-9:22 pm

Nonstop4h 36m

Seattle/Tacoma Intl

Sun 2/1

11:40 am-5:45 pm

Nonstop4h 05m

$217

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Thu 12/11

7:56 pm-11:53 am

1 stop17h 57m

Seattle/Tacoma Intl

Tue 12/23

2:54 pm-9:23 am

2 stops40h 29m

$226

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Thu 12/11

7:56 pm-11:53 am

1 stop17h 57m

Seattle/Tacoma Intl

Tue 12/23

2:54 pm-1:14 pm

1 stop20h 20m

$227

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Sun 12/21

6:45 am-12:30 pm

1 stop7h 45m

Seattle/Tacoma Intl

Sat 1/3

2:54 pm-12:17 am

1 stop7h 23m

$228

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Mon 12/29

6:45 am-1:54 pm

2 stops33h 09m

Seattle/Tacoma Intl

Mon 1/5

7:48 pm-4:15 pm

1 stop18h 27m

$229

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?

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 $465. 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 $596.

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 $481 when looking at flights departing in the morning. Flights to Seattle are more costly in the evening, with an average ticket price of $555. 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 $324 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 $263 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 November 2025, prices for San Antonio to Seattle flights are approximately 19% 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

$266

Fastest flight time

4h 20m

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 $266. The best round-trip flight deal from San Antonio to Seattle found on momondo in the last 72 hours is $407.
The fastest flight from San Antonio to Seattle takes 4h 20m
Direct flights go from San Antonio to Seattle every day.
There is 1 airport near Seattle: 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 36m.

  • 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
8,158 reviews
Search Spirit Airlines flights
FrontierPriceFrom $101Free CancellationRating
5.8
3,099 reviews
Search Frontier flights
DeltaPriceFrom $178Free CancellationRating
7.9
7,998 reviews
Search Delta flights
SouthwestPriceFrom $194Free CancellationRating
8.0
4,254 reviews
Search Southwest flights
American AirlinesPriceFrom $194Free CancellationRating
7.2
11,038 reviews
Search American Airlines flights
United AirlinesPriceFrom $214Free CancellationRating
7.4
9,046 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $237Free CancellationRating
8.0
11,354 reviews
Search Alaska Airlines flights
Hawaiian AirlinesPriceFrom $237Free CancellationRating
7.8
2,814 reviews
Search Hawaiian Airlines flights

  • Alaska Airlines Flights From San Antonio to Seattle

    Alaska Airlines operates around 6 flights from San Antonio to Seattle every week. The average price of these flights found in the last 72 hours has been $412, but momondo users have found Alaska Airlines deals from San Antonio to Seattle from as low as $237 round-trip. Alaska Airlines has been scored 8.0/10 in 11,354 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 2,814 user reviews) flies into Seattle from San Antonio 12 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
Cle Elum
Lakewood
Federal Way
Fife
Centralia
Kirkland
Westport
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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