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Cheap flights from San Antonio to Seattle from $130

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 8/1. 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
7:54 pm - 10:06 am
SAT
-
SEA
16h 12m
1 stop
Frontier Logo
7:41 pm - 6:56 pm
SEA
-
SAT
21h 15m
1 stop
$259Frontier
Wed, Jun 3 - Tue, Jun 9
Frontier Logo
7:51 pm - 9:49 am
SAT
-
SEA
15h 58m
1 stop
Frontier Logo
7:41 pm - 6:54 pm
SEA
-
SAT
21h 13m
1 stop
$260Frontier
Thu, Aug 6 - Mon, Aug 10
Delta Logo
4:48 pm - 9:48 pm
SAT
-
SEA
7h 00m
1 stop
Delta Logo
5:15 am - 1:31 pm
SEA
-
SAT
6h 16m
1 stop
$265Delta
Mon, Aug 10 - Wed, Aug 19
Southwest Logo
5:55 pm - 11:30 pm
SAT
-
SEA
7h 35m
2 stops
Southwest Logo
10:45 pm - 10:20 am
SEA
-
SAT
9h 35m
1 stop
$270Southwest
Tue, Jul 14 - Tue, Jul 21
Frontier Logo
7:54 pm - 10:06 am
SAT
-
SEA
16h 12m
1 stop
Frontier Logo
8:20 pm - 8:11 pm
SEA
-
SAT
21h 51m
1 stop
$271Frontier
Wed, Jun 3 - Mon, Jun 8
Southwest Logo
8:05 pm - 1:10 am
SAT
-
SEA
7h 05m
1 stop
Southwest Logo
10:45 pm - 10:20 am
SEA
-
SAT
9h 35m
1 stop
$275Southwest
Sat, Jun 13 - Tue, Jun 16
Southwest Logo
12:55 pm - 8:15 pm
SAT
-
SEA
9h 20m
2 stops
Southwest Logo
6:15 am - 7:20 pm
SEA
-
SAT
11h 05m
1 stop
$276Southwest
Wed, Aug 26 - Thu, Sep 3
Southwest Logo
1:40 pm - 11:10 pm
SAT
-
SEA
11h 30m
2 stops
Southwest Logo
3:05 pm - 12:15 am
SEA
-
SAT
7h 10m
1 stop
$280Southwest
Tue, Jun 9 - Tue, Jun 16
Frontier Logo
7:54 pm - 10:06 am
SAT
-
SEA
16h 12m
1 stop
Frontier Logo
8:20 pm - 6:56 pm
SEA
-
SAT
20h 36m
2 stops
$282Frontier
Wed, Jun 3 - Mon, Jun 8
Frontier Logo
8:56 pm - 10:35 am
SAT
-
SEA
15h 39m
1 stop
Frontier Logo
2:20 pm - 8:11 pm
SEA
-
SAT
27h 51m
1 stop
$284Frontier
Wed, Jun 10 - Tue, Jun 16

Delta flights from San Antonio to Seattle

Our best Delta deals on San Antonio to Seattle flight tickets
Delta
Aug 10
SAT4:48 pmSan Antonio
7h 00m
1 stop
SEA9:48 pmSeattle/Tacoma Intl
Aug 19
SEA5:15 amSeattle/Tacoma Intl
6h 16m
1 stop
SAT1:31 pmSan Antonio
$265
Delta
Jun 5
SAT5:55 pmSan Antonio
8h 15m
1 stop
SEA12:10 amSeattle/Tacoma Intl
Jun 9
SEA9:45 amSeattle/Tacoma Intl
10h 36m
1 stop
SAT10:21 pmSan Antonio
$286
Delta
Jun 20
SAT7:10 amSan Antonio
7h 24m
1 stop
SEA12:34 pmSeattle/Tacoma Intl
Jun 24
SEA2:55 pmSeattle/Tacoma Intl
6h 57m
1 stop
SAT11:52 pmSan Antonio
$288

Southwest flights from San Antonio to Seattle

Our best Southwest deals on San Antonio to Seattle flight tickets
Southwest
Jul 14
SAT5:55 pmSan Antonio
7h 35m
2 stops
SEA11:30 pmSeattle/Tacoma Intl
Jul 21
SEA10:45 pmSeattle/Tacoma Intl
9h 35m
1 stop
SAT10:20 amSan Antonio
$270
Southwest
Jun 13
SAT8:05 pmSan Antonio
7h 05m
1 stop
SEA1:10 amSeattle/Tacoma Intl
Jun 16
SEA10:45 pmSeattle/Tacoma Intl
9h 35m
1 stop
SAT10:20 amSan Antonio
$275
Southwest
Aug 26
SAT12:55 pmSan Antonio
9h 20m
2 stops
SEA8:15 pmSeattle/Tacoma Intl
Sep 3
SEA6:15 amSeattle/Tacoma Intl
11h 05m
1 stop
SAT7:20 pmSan Antonio
$276

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 May 17, 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

Cheapest round-trip

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Wed 6/3

7:54 pm-10:06 am

1 stop16h 12m

Seattle/Tacoma Intl

Tue 6/9

7:41 pm-6:56 pm

1 stop21h 15m

$259

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Thu 8/6

7:51 pm-9:49 am

1 stop15h 58m

Seattle/Tacoma Intl

Mon 8/10

7:41 pm-6:54 pm

1 stop21h 13m

$260
Quickest round-trip

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Mon 8/10

4:48 pm-9:48 pm

1 stop7h 00m

Seattle/Tacoma Intl

Wed 8/19

5:15 am-1:31 pm

1 stop6h 16m

$265

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Tue 7/14

5:55 pm-11:30 pm

2 stops7h 35m

Seattle/Tacoma Intl

Tue 7/21

10:45 pm-10:20 am

1 stop9h 35m

$270

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Wed 6/3

7:54 pm-10:06 am

1 stop16h 12m

Seattle/Tacoma Intl

Mon 6/8

8:20 pm-8:11 pm

1 stop21h 51m

$271

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Sat 6/13

8:05 pm-1:10 am

1 stop7h 05m

Seattle/Tacoma Intl

Tue 6/16

10:45 pm-10:20 am

1 stop9h 35m

$275

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Wed 8/26

12:55 pm-8:15 pm

2 stops9h 20m

Seattle/Tacoma Intl

Thu 9/3

6:15 am-7:20 pm

1 stop11h 05m

$276

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Tue 6/9

1:40 pm-11:10 pm

2 stops11h 30m

Seattle/Tacoma Intl

Tue 6/16

3:05 pm-12:15 am

1 stop7h 10m

$280

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Wed 6/3

7:54 pm-10:06 am

1 stop16h 12m

Seattle/Tacoma Intl

Mon 6/8

8:20 pm-6:56 pm

2 stops20h 36m

$282

San AntonioSeattle

SAT - SEA

SATSEA

San Antonio

Wed 6/10

8:56 pm-10:35 am

1 stop15h 39m

Seattle/Tacoma Intl

Tue 6/16

2:20 pm-8:11 pm

1 stop27h 51m

$284

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 $257. 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 $276.

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 $429. 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 $565.

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 $464 when looking at flights departing in the morning. Flights to Seattle are more costly in the evening, with an average ticket price of $570. 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 $319 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 $261 on momondo.

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

As of May 2026, prices for San Antonio to Seattle flights are approximately 31% 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

$278

Fastest flight time

4h 23m

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 $278. The best round-trip flight deal from San Antonio to Seattle found on momondo in the last 72 hours is $457.
The fastest flight from San Antonio to Seattle takes 4h 23m
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 23m.

  • 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
5.6
2,948 reviews
Search Frontier flights
DeltaPriceFrom $109Free CancellationRating
7.9
8,449 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $153Free CancellationRating
7.8
2,837 reviews
Search Hawaiian Airlines flights
SouthwestPriceFrom $194Free CancellationRating
8.0
4,290 reviews
Search Southwest flights
American AirlinesPriceFrom $194Free CancellationRating
7.1
11,654 reviews
Search American Airlines flights
United AirlinesPriceFrom $210Free CancellationRating
7.4
9,731 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $218Free CancellationRating
7.9
12,376 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From San Antonio to Seattle

    Alaska Airlines operates around 5 flights from San Antonio to Seattle every week. The average price of these flights found in the last 72 hours has been $395, but momondo users have found Alaska Airlines deals from San Antonio to Seattle from as low as $218 round-trip. Alaska Airlines has been scored 7.9/10 in 12,376 reviews.

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
Redmond
Kent
Tukwila
Puyallup
Marysville
Lakewood
Cle Elum
Federal Way
Centralia
Fife
Westport
Shoreline
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.

An easier way to manage your Seattle trip

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