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Cheap flights from San Antonio to Seattle from $80

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 5/12. 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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Find the cheapest flights from San Antonio to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
3:00 pm - 9:27 am
SAT
-
SEA
20h 27m
1 stop
Frontier Logo
6:57 pm - 2:19 pm
SEA
-
SAT
17h 22m
1 stop
$201Frontier
Fri, May 1 - Sun, May 10
Delta Logo
4:47 pm - 10:55 pm
SAT
-
SEA
8h 08m
1 stop
Delta Logo
11:55 pm - 11:03 am
SEA
-
SAT
9h 08m
1 stop
$206Delta
Fri, May 15 - Wed, May 27
Frontier Logo
3:00 pm - 5:42 pm
SAT
-
SEA
28h 42m
2 stops
Frontier Logo
7:12 pm - 2:15 pm
SEA
-
SAT
17h 03m
1 stop
$207Frontier
Fri, May 1 - Sun, May 3
Frontier Logo
3:00 pm - 5:42 pm
SAT
-
SEA
28h 42m
2 stops
Frontier Logo
7:12 pm - 2:15 pm
SEA
-
SAT
17h 03m
1 stop
$208Frontier
Fri, May 1 - Sun, May 3
Frontier Logo
4:49 pm - 9:27 am
SAT
-
SEA
18h 38m
1 stop
Frontier Logo
9:19 pm - 2:19 pm
SEA
-
SAT
15h 00m
2 stops
$211Frontier
Wed, Apr 29 - Mon, May 4
Frontier Logo
3:00 pm - 5:42 pm
SAT
-
SEA
28h 42m
2 stops
Frontier Logo
7:12 pm - 2:19 pm
SEA
-
SAT
17h 07m
1 stop
$213Frontier
Fri, May 1 - Mon, May 4
Delta Logo
6:12 pm - 11:54 pm
SAT
-
SEA
7h 42m
1 stop
Delta Logo
6:00 am - 5:17 pm
SEA
-
SAT
9h 17m
1 stop
$214Delta
Fri, May 1 - Sun, May 3
Delta Logo
5:55 pm - 12:12 am
SAT
-
SEA
8h 17m
1 stop
Delta Logo
11:59 pm - 11:45 am
SEA
-
SAT
9h 46m
1 stop
$215Delta
Wed, May 27 - Thu, May 28
Frontier Logo
3:00 pm - 9:27 am
SAT
-
SEA
20h 27m
1 stop
Frontier Logo
10:57 am - 11:40 am
SEA
-
SAT
22h 43m
2 stops
$216Frontier
Mon, Apr 20 - Wed, Apr 22
Frontier Logo
3:00 pm - 9:27 am
SAT
-
SEA
20h 27m
1 stop
Frontier Logo
7:12 pm - 2:15 pm
SEA
-
SAT
17h 03m
1 stop
$217Frontier
Mon, Apr 27 - Sun, May 3

Frontier flights from San Antonio to Seattle

Our best Frontier deals on San Antonio to Seattle flight tickets
Frontier
May 1
SAT3:00 pmSan Antonio
20h 27m
1 stop
SEA9:27 amSeattle/Tacoma Intl
May 10
SEA6:57 pmSeattle/Tacoma Intl
17h 22m
1 stop
SAT2:19 pmSan Antonio
$201
Frontier
May 1
SAT3:00 pmSan Antonio
28h 42m
2 stops
SEA5:42 pmSeattle/Tacoma Intl
May 3
SEA7:12 pmSeattle/Tacoma Intl
17h 03m
1 stop
SAT2:15 pmSan Antonio
$207
Frontier
May 1
SAT3:00 pmSan Antonio
28h 42m
2 stops
SEA5:42 pmSeattle/Tacoma Intl
May 3
SEA7:12 pmSeattle/Tacoma Intl
17h 03m
1 stop
SAT2:15 pmSan Antonio
$208

Delta flights from San Antonio to Seattle

Our best Delta deals on San Antonio to Seattle flight tickets
Delta
May 15
SAT4:47 pmSan Antonio
9h 08m
1 stop
SEA11:55 pmSeattle/Tacoma Intl
May 28
SEA10:35 pmSeattle/Tacoma Intl
10h 28m
1 stop
SAT11:03 amSan Antonio
$206
Delta
Apr 4
SAT7:35 amSan Antonio
9h 06m
1 stop
SEA2:41 pmSeattle/Tacoma Intl
Apr 9
SEA1:32 pmSeattle/Tacoma Intl
8h 44m
1 stop
SAT12:16 amSan Antonio
$214
Delta
May 27
SAT5:55 pmSan Antonio
8h 17m
1 stop
SEA12:12 amSeattle/Tacoma Intl
Jun 8
SEA11:05 pmSeattle/Tacoma Intl
10h 06m
1 stop
SAT11:11 amSan Antonio
$215

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 February 26, 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

Fri 5/1

3:00 pm-9:27 am

1 stop20h 27m

Seattle/Tacoma Intl

Sun 5/10

6:57 pm-2:19 pm

1 stop17h 22m

$201

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Fri 5/15

4:47 pm-10:55 pm

1 stop8h 08m

Seattle/Tacoma Intl

Wed 5/27

11:55 pm-11:03 am

1 stop9h 08m

$206

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Fri 5/1

3:00 pm-5:42 pm

2 stops28h 42m

Seattle/Tacoma Intl

Sun 5/3

7:12 pm-2:15 pm

1 stop17h 03m

$207

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Fri 5/1

3:00 pm-5:42 pm

2 stops28h 42m

Seattle/Tacoma Intl

Sun 5/3

7:12 pm-2:15 pm

1 stop17h 03m

$208

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Wed 4/29

4:49 pm-9:27 am

1 stop18h 38m

Seattle/Tacoma Intl

Mon 5/4

9:19 pm-2:19 pm

2 stops15h 00m

$211

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Fri 5/1

3:00 pm-5:42 pm

2 stops28h 42m

Seattle/Tacoma Intl

Mon 5/4

7:12 pm-2:19 pm

1 stop17h 07m

$213

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Fri 5/1

6:12 pm-11:54 pm

1 stop7h 42m

Seattle/Tacoma Intl

Sun 5/3

6:00 am-5:17 pm

1 stop9h 17m

$214

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Wed 5/27

5:55 pm-12:12 am

1 stop8h 17m

Seattle/Tacoma Intl

Thu 5/28

11:59 pm-11:45 am

1 stop9h 46m

$215

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Mon 4/20

3:00 pm-9:27 am

1 stop20h 27m

Seattle/Tacoma Intl

Wed 4/22

10:57 am-11:40 am

2 stops22h 43m

$216

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Mon 4/27

3:00 pm-9:27 am

1 stop20h 27m

Seattle/Tacoma Intl

Sun 5/3

7:12 pm-2:15 pm

1 stop17h 03m

$217

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 $269.

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 $425. 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 $590.

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

Flying to Seattle from San Antonio in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $445 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the evening, with an average ticket price of $565. 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 $315 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 $245 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 February 2026, prices for San Antonio to Seattle flights are approximately 5% 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

$180

Fastest flight time

4h 26m

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 $180. The best round-trip flight deal from San Antonio to Seattle found on momondo in the last 72 hours is $292.
The fastest flight from San Antonio to Seattle takes 4h 26m
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 26m.

  • 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
3,040 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $87Free CancellationRating
6.3
8,494 reviews
Search Spirit Airlines flights
DeltaPriceFrom $107Free CancellationRating
7.9
8,237 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $178Free CancellationRating
7.8
2,836 reviews
Search Hawaiian Airlines flights
SouthwestPriceFrom $194Free CancellationRating
8.0
4,299 reviews
Search Southwest flights
American AirlinesPriceFrom $194Free CancellationRating
7.2
11,353 reviews
Search American Airlines flights
United AirlinesPriceFrom $214Free CancellationRating
7.4
9,347 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $217Free CancellationRating
8.0
11,959 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 $379, 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 8.0/10 in 11,959 reviews.

  • Hawaiian Airlines Flights From San Antonio to Seattle

    $178 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 2,837 user reviews) flies into Seattle from San Antonio 5 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
Lakewood
Tukwila
Federal Way
Fife
Westport
Kirkland
Centralia
Tumwater

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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