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Cheap flights from San Antonio to Seattle from $71

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 3/4. 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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Find the cheapest flights from San Antonio to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
6:12 pm - 12:01 pm
SAT
-
SEA
19h 49m
1 stop
Frontier Logo
12:24 pm - 9:06 am
SEA
-
SAT
18h 42m
1 stop
$200Frontier
Wed, Mar 4 - Fri, Mar 13
Frontier Logo
8:25 pm - 10:55 am
SAT
-
SEA
16h 30m
1 stop
Frontier Logo
1:16 pm - 7:37 pm
SEA
-
SAT
28h 21m
1 stop
$201Frontier
Thu, Feb 19 - Thu, Feb 26
American Airlines Logo
3:08 pm - 9:15 pm
SAT
-
SEA
8h 07m
1 stop
American Airlines Logo
11:57 pm - 8:23 am
SEA
-
SAT
6h 26m
1 stop
$202American Airlines
Sat, Feb 14 - Wed, Feb 18
Frontier Logo
6:12 pm - 12:01 pm
SAT
-
SEA
19h 49m
1 stop
Frontier Logo
10:08 pm - 12:17 am
SEA
-
SAT
24h 09m
2 stops
$203Frontier
Wed, Feb 25 - Tue, Mar 17
American Airlines Logo
3:43 pm - 10:48 pm
SAT
-
SEA
9h 05m
1 stop
American Airlines Logo
12:59 am - 9:33 am
SEA
-
SAT
6h 34m
1 stop
$206American Airlines
Wed, Feb 18 - Thu, Mar 5
Delta Logo
7:35 am - 2:44 pm
SAT
-
SEA
9h 09m
1 stop
Delta Logo
2:00 pm - 11:43 pm
SEA
-
SAT
7h 43m
1 stop
$207Delta
Sat, Feb 14 - Wed, Feb 18
Frontier Logo
8:22 pm - 12:01 pm
SAT
-
SEA
17h 39m
1 stop
Frontier Logo
12:30 pm - 8:45 am
SEA
-
SAT
18h 15m
1 stop
$208Frontier
Fri, Feb 27 - Sun, Mar 1
Frontier Logo
8:25 pm - 10:55 am
SAT
-
SEA
16h 30m
1 stop
Frontier Logo
1:16 pm - 7:37 pm
SEA
-
SAT
28h 21m
1 stop
$210Frontier
Thu, Feb 19 - Thu, Feb 26
American Airlines Logo
8:08 pm - 12:55 am
SAT
-
SEA
6h 47m
1 stop
American Airlines Logo
11:57 pm - 8:23 am
SEA
-
SAT
6h 26m
1 stop
$211American Airlines
Thu, Feb 12 - Wed, Feb 18
Frontier Logo
6:12 pm - 12:01 pm
SAT
-
SEA
19h 49m
1 stop
Frontier Logo
12:24 pm - 12:17 am
SEA
-
SAT
9h 53m
1 stop
$212Frontier
Wed, Feb 25 - Mon, Mar 16

Delta flights from San Antonio to Seattle

Our best Delta deals on San Antonio to Seattle flight tickets
Delta
Feb 14
SAT7:35 amSan Antonio
9h 09m
1 stop
SEA2:44 pmSeattle/Tacoma Intl
Feb 18
SEA2:00 pmSeattle/Tacoma Intl
7h 43m
1 stop
SAT11:43 pmSan Antonio
$207
Delta
Jun 7
SAT4:10 pmSan Antonio
8h 07m
1 stop
SEA10:17 pmSeattle/Tacoma Intl
Jun 16
SEA11:53 pmSeattle/Tacoma Intl
10h 12m
1 stop
SAT12:05 pmSan Antonio
$215
Delta
Feb 24
SAT6:40 amSan Antonio
10h 14m
1 stop
SEA2:54 pmSeattle/Tacoma Intl
Mar 17
SEA1:32 pmSeattle/Tacoma Intl
8h 44m
1 stop
SAT12:16 amSan Antonio
$233

United Airlines flights from San Antonio to Seattle

Our best United Airlines deals on San Antonio to Seattle flight tickets
United Airlines
Apr 14
SAT9:40 amSan Antonio
10h 20m
2 stops
SEA6:00 pmSeattle/Tacoma Intl
Apr 18
SEA5:00 amSeattle/Tacoma Intl
6h 00m
1 stop
SAT1:00 pmSan Antonio
$242
United Airlines
Mar 25
SAT5:47 amSan Antonio
6h 02m
1 stop
SEA9:49 amSeattle/Tacoma Intl
Mar 29
SEA11:35 pmSeattle/Tacoma Intl
7h 07m
1 stop
SAT8:42 amSan Antonio
$258
United Airlines
Feb 4
SAT1:20 pmSan Antonio
9h 52m
2 stops
SEA9:12 pmSeattle/Tacoma Intl
Feb 8
SEA5:00 amSeattle/Tacoma Intl
6h 09m
1 stop
SAT1:09 pmSan Antonio
$302

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 January 23, 2026.
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

Wed 3/4

6:12 pm-12:01 pm

1 stop19h 49m

Seattle/Tacoma Intl

Fri 3/13

12:24 pm-9:06 am

1 stop18h 42m

$200

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Thu 2/19

8:25 pm-10:55 am

1 stop16h 30m

Seattle/Tacoma Intl

Thu 2/26

1:16 pm-7:37 pm

1 stop28h 21m

$201

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Sat 2/14

3:08 pm-9:15 pm

1 stop8h 07m

Seattle/Tacoma Intl

Wed 2/18

11:57 pm-8:23 am

1 stop6h 26m

$202

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Wed 2/25

6:12 pm-12:01 pm

1 stop19h 49m

Seattle/Tacoma Intl

Tue 3/17

10:08 pm-12:17 am

2 stops24h 09m

$203

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Wed 2/18

3:43 pm-10:48 pm

1 stop9h 05m

Seattle/Tacoma Intl

Thu 3/5

12:59 am-9:33 am

1 stop6h 34m

$206

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Sat 2/14

7:35 am-2:44 pm

1 stop9h 09m

Seattle/Tacoma Intl

Wed 2/18

2:00 pm-11:43 pm

1 stop7h 43m

$207

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Fri 2/27

8:22 pm-12:01 pm

1 stop17h 39m

Seattle/Tacoma Intl

Sun 3/1

12:30 pm-8:45 am

1 stop18h 15m

$208

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Thu 2/19

8:25 pm-10:55 am

1 stop16h 30m

Seattle/Tacoma Intl

Thu 2/26

1:16 pm-7:37 pm

1 stop28h 21m

$210

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Thu 2/12

8:08 pm-12:55 am

1 stop6h 47m

Seattle/Tacoma Intl

Wed 2/18

11:57 pm-8:23 am

1 stop6h 26m

$211

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Wed 2/25

6:12 pm-12:01 pm

1 stop19h 49m

Seattle/Tacoma Intl

Mon 3/16

12:24 pm-12:17 am

1 stop9h 53m

$212

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 $264. 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 $436. 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 $585.

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 $474 when looking at flights departing in the morning. Flights to Seattle are more costly in the evening, with an average ticket price of $561. 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 $317 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 $267 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 January 2026, prices for San Antonio to Seattle flights are approximately 38% 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

$218

Fastest flight time

4h 34m

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 $218. The best round-trip flight deal from San Antonio to Seattle found on momondo in the last 72 hours is $282.
The fastest flight from San Antonio to Seattle takes 4h 34m
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 34m.

  • 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 $78Free CancellationRating
5.7
3,056 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $87Free CancellationRating
6.3
8,367 reviews
Search Spirit Airlines flights
DeltaPriceFrom $115Free CancellationRating
7.9
8,093 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $188Free CancellationRating
7.8
2,829 reviews
Search Hawaiian Airlines flights
SouthwestPriceFrom $194Free CancellationRating
8.0
4,267 reviews
Search Southwest flights
American AirlinesPriceFrom $194Free CancellationRating
7.2
11,176 reviews
Search American Airlines flights
United AirlinesPriceFrom $214Free CancellationRating
7.4
9,195 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $224Free CancellationRating
8.0
11,781 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 $389, but momondo users have found Alaska Airlines deals from San Antonio to Seattle from as low as $224 round-trip. Alaska Airlines has been scored 8.0/10 in 11,781 reviews.

  • Hawaiian Airlines Flights From San Antonio to Seattle

    $188 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 2,829 user reviews) flies into Seattle from San Antonio 7 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
Redmond
Puyallup
Cle Elum
Tukwila
Lakewood
Federal Way
Centralia
Westport
Kirkland
Fife
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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