What is the cheapest airline that flies from San Antonio to Seattle/Tacoma Intl?

Delta and Southwest are the most popular carriers operating from San Antonio to Seattle/Tacoma Intl

How many flights depart from San Antonio to Seattle on average per week?

As of September 2026, 6 flights take off from San Antonio and land in Seattle each week. The most common flight departure day for this route is Thu, with 50% of weekly flights taking off on this day.

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 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 stopovers. 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 travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

R1 710 Cheap Flights from San Antonio to Seattle in 2026/27

Find the cheapest flights from San Antonio to Seattle

Return

One-way

Last minute

Direct

Cheap return flights

Enter your travel dates to find the best prices.

11:30 - 17:05SAT San Antonio-SEA Seattle/Tacoma Intl

7h 35m1 stop Denver Intl

7:40 - 18:15SEA Seattle/Tacoma Intl-SAT San Antonio

8h 35m1 stop Las Vegas Harry Reid Intl

R4 088Southwest

Wed, Feb 10 - Thu, Feb 18

13:35 - 20:48SAT San Antonio-SEA Seattle/Tacoma Intl

9h 13m2 stops Denver Intl San Francisco

14:10 - 22:50SEA Seattle/Tacoma Intl-SAT San Antonio

6h 40m1 stop Houston George Bush Intcntl

R4 121United Airlines

Sat, Jan 16 - Fri, Jan 22

18:05 - 0:10SAT San Antonio-SEA Seattle/Tacoma Intl

8h 05m2 stops Phoenix Sky Harbor Intl Sacramento Intl

5:40 - 14:50SEA Seattle/Tacoma Intl-SAT San Antonio

7h 10m1 stop Phoenix Sky Harbor Intl

R4 137Southwest

Fri, Nov 13 - Mon, Nov 16

18:01 - 23:59SAT San Antonio-SEA Seattle/Tacoma Intl

7h 58m1 stop Salt Lake City

5:35 - 13:39SEA Seattle/Tacoma Intl-SAT San Antonio

6h 04m1 stop Salt Lake City

R4 170Delta

Fri, Oct 2 - Thu, Nov 12

13:35 - 18:09SAT San Antonio-SEA Seattle/Tacoma Intl

6h 34m1 stop Denver Intl

14:10 - 22:50SEA Seattle/Tacoma Intl-SAT San Antonio

6h 40m1 stop Houston George Bush Intcntl

R4 251United Airlines

Fri, Jan 8 - Fri, Jan 15

12:45 - 16:58SAT San Antonio-SEA Seattle/Tacoma Intl

6h 13m1 stop Salt Lake City

15:21 - 0:06SEA Seattle/Tacoma Intl-SAT San Antonio

6h 45m1 stop Los Angeles Los Angeles

R4 268Delta

Tue, Nov 24 - Tue, Dec 1

16:43 - 21:25SAT San Antonio-SEA Seattle/Tacoma Intl

6h 42m1 stop Denver Intl

23:58 - 8:30SEA Seattle/Tacoma Intl-SAT San Antonio

6h 32m1 stop Houston George Bush Intcntl

R4 316United Airlines

Thu, Dec 24 - Wed, Dec 30

13:35 - 20:48SAT San Antonio-SEA Seattle/Tacoma Intl

9h 13m2 stops Denver Intl San Francisco

14:10 - 22:50SEA Seattle/Tacoma Intl-SAT San Antonio

6h 40m1 stop Houston George Bush Intcntl

R4 333United Airlines

Fri, Jan 8 - Fri, Jan 15

11:50 - 18:40SAT San Antonio-SEA Seattle/Tacoma Intl

8h 50m2 stops Las Vegas Harry Reid Intl Sacramento Intl

0:15 - 12:55SEA Seattle/Tacoma Intl-SAT San Antonio

10h 40m1 stop Chicago Midway

R4 365Southwest

Wed, Nov 18 - Mon, Nov 30

18:00 - 23:59SAT San Antonio-SEA Seattle/Tacoma Intl

7h 59m1 stop Salt Lake City

23:47 - 11:55SEA Seattle/Tacoma Intl-SAT San Antonio

10h 08m1 stop Minneapolis St Paul

R4 382Delta

Fri, Oct 9 - Sat, Nov 21

Cheap last-minute flights

Enter your travel dates to find the best prices.

18:01 - 22:10SAT San Antonio-SEA Seattle/Tacoma Intl

6h 09m1 stop Salt Lake City

23:59 - 9:43SEA Seattle/Tacoma Intl-SAT San Antonio

7h 44m1 stop Atlanta Hartsfield-Jackson

R4 447Delta

Mon, Sep 21 - Sat, Oct 24

6:10 - 10:30SAT San Antonio-SEA Seattle/Tacoma Intl

6h 20m1 stop Las Vegas Harry Reid Intl

5:35 - 16:05SEA Seattle/Tacoma Intl-SAT San Antonio

8h 30m2 stops Phoenix Sky Harbor Intl Dallas Love Field

R4 528Southwest

Tue, Sep 22 - Tue, Oct 27

11:30 - 18:10SAT San Antonio-SEA Seattle/Tacoma Intl

8h 40m2 stops Dallas Love Field Denver Intl

12:05 - 22:15SEA Seattle/Tacoma Intl-SAT San Antonio

8h 10m2 stops Sacramento Intl Dallas Love Field

R4 626Southwest

Tue, Sep 22 - Tue, Oct 27

18:07 - 23:55SAT San Antonio-SEA Seattle/Tacoma Intl

7h 48m1 stop Minneapolis St Paul

14:30 - 0:13SEA Seattle/Tacoma Intl-SAT San Antonio

7h 43m1 stop Los Angeles Los Angeles

R4 658Delta

Mon, Sep 21 - Thu, Oct 29

12:29 - 16:50SAT San Antonio-SEA Seattle/Tacoma Intl

6h 21m1 stop Salt Lake City

5:30 - 13:40SEA Seattle/Tacoma Intl-SAT San Antonio

6h 10m1 stop Salt Lake City

R4 870Delta

Mon, Sep 21 - Fri, Oct 30

18:54 - 1:15SAT San Antonio-SEA Seattle/Tacoma Intl

8h 21m1 stop San Francisco

13:19 - 21:59SEA Seattle/Tacoma Intl-SAT San Antonio

6h 40m1 stop San Francisco

R4 919United Airlines

Thu, Sep 24 - Thu, Oct 1

5:30 - 13:44SAT San Antonio-SEA Seattle/Tacoma Intl

10h 14m1 stop Atlanta Hartsfield-Jackson

23:59 - 11:39SEA Seattle/Tacoma Intl-SAT San Antonio

9h 40m1 stop Minneapolis St Paul

R5 001Delta

Thu, Sep 24 - Tue, Sep 29

7:20 - 12:27SAT San Antonio-SEA Seattle/Tacoma Intl

7h 07m1 stop Los Angeles Los Angeles

23:59 - 9:43SEA Seattle/Tacoma Intl-SAT San Antonio

7h 44m1 stop Atlanta Hartsfield-Jackson

R5 277Delta

Sat, Sep 19 - Sat, Oct 24

16:50 - 22:59SAT San Antonio-SEA Seattle/Tacoma Intl

8h 09m1 stop Denver Intl

23:59 - 8:38SEA Seattle/Tacoma Intl-SAT San Antonio

6h 39m1 stop Houston George Bush Intcntl

R5 326United Airlines

Thu, Sep 24 - Sun, Oct 4

7:20 - 14:53SAT San Antonio-SEA Seattle/Tacoma Intl

9h 33m1 stop Los Angeles Los Angeles

14:30 - 0:13SEA Seattle/Tacoma Intl-SAT San Antonio

7h 43m1 stop Los Angeles Los Angeles

R5 489Delta

Sat, Sep 19 - Thu, Oct 29

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Southwest flights from San Antonio to Seattle

Our best Southwest deals on San Antonio to Seattle flight tickets

Southwest

Feb 10

SAT11:30San Antonio

7h 35m

1 stop

SEA17:05Seattle/Tacoma Intl

Feb 18

SEA7:40Seattle/Tacoma Intl

8h 35m

1 stop

SAT18:15San Antonio

R4 088

Southwest

Nov 13

SAT18:05San Antonio

8h 05m

2 stops

SEA0:10Seattle/Tacoma Intl

Nov 16

SEA5:40Seattle/Tacoma Intl

7h 10m

1 stop

SAT14:50San Antonio

R4 137

Southwest

Nov 18

SAT11:50San Antonio

8h 50m

2 stops

SEA18:40Seattle/Tacoma Intl

Nov 30

SEA0:15Seattle/Tacoma Intl

10h 40m

1 stop

SAT12:55San Antonio

R4 365

Delta flights from San Antonio to Seattle

Our best Delta deals on San Antonio to Seattle flight tickets

Delta

Oct 2

SAT16:50San Antonio

7h 15m

1 stop

SEA22:05Seattle/Tacoma Intl

Nov 2

SEA23:59Seattle/Tacoma Intl

10h 36m

1 stop

SAT12:35San Antonio

R4 170

Delta

Nov 24

SAT12:45San Antonio

6h 13m

1 stop

SEA16:58Seattle/Tacoma Intl

Dec 1

SEA15:21Seattle/Tacoma Intl

6h 45m

1 stop

SAT0:06San Antonio

R4 268

Delta

Oct 9

SAT18:00San Antonio

7h 59m

1 stop

SEA23:59Seattle/Tacoma Intl

Nov 15

SEA15:13Seattle/Tacoma Intl

6h 50m

1 stop

SAT0:03San Antonio

R4 382

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Wed 10/2

11:30-17:05

1 stop7h 35m

Seattle/Tacoma Intl

Thu 18/2

7:40-18:15

1 stop8h 35m

R4 088

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Sat 16/1

13:35-20:48

2 stops9h 13m

Seattle/Tacoma Intl

Fri 22/1

14:10-22:50

1 stop6h 40m

R4 121

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Fri 13/11

18:05-0:10

2 stops8h 05m

Seattle/Tacoma Intl

Mon 16/11

5:40-14:50

1 stop7h 10m

R4 137

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Fri 2/10

18:01-23:59

1 stop7h 58m

Seattle/Tacoma Intl

Thu 12/11

5:35-13:39

1 stop6h 04m

R4 170

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Fri 8/1

13:35-18:09

1 stop6h 34m

Seattle/Tacoma Intl

Fri 15/1

14:10-22:50

1 stop6h 40m

R4 251

Fastest return journey

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Tue 24/11

12:45-16:58

1 stop6h 13m

Seattle/Tacoma Intl

Tue 1/12

15:21-0:06

1 stop6h 45m

R4 268

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Thu 24/12

16:43-21:25

1 stop6h 42m

Seattle/Tacoma Intl

Wed 30/12

23:58-8:30

1 stop6h 32m

R4 316

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Fri 8/1

13:35-20:48

2 stops9h 13m

Seattle/Tacoma Intl

Fri 15/1

14:10-22:50

1 stop6h 40m

R4 333

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Wed 18/11

11:50-18:40

2 stops8h 50m

Seattle/Tacoma Intl

Mon 30/11

0:15-12:55

1 stop10h 40m

R4 365

San AntonioSeattle

SAT San Antonio - SEA Seattle/Tacoma Intl

SATSEA

San Antonio

Fri 9/10

18:00-23:59

1 stop7h 59m

Seattle/Tacoma Intl

Sat 21/11

23:47-11:55

1 stop10h 08m

R4 382

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

What is the typical price of a round-trip flight between San Antonio and Seattle?

Prices are currently low for flights on this route.

Typical prices usually range from R4 235 to R6 776.
The lowest price recently found on this route was R4 088.

What is the cheapest month to fly to Seattle?

The cheapest month to fly to Seattle from San Antonio is in October. Flight prices, which tend to average around R4 496, are often lower during this time because this is during the off-season. If you aren’t able to travel to Seattle during the month of October, then flying in February is also cheap. Prices for this month can be found on momondo for an average of R4 512.

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 R5 488 when searching weeks before you fly. 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 R4 707 on momondo.

What cabin class options are available on San Antonio to Seattle flights?

There is only 1 cabin class available to choose from on San Antonio to Seattle 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 September 2026, prices for San Antonio to Seattle flights are approximately 2% 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 return 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	R1 710
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 R1 710. The best return flight deal from San Antonio to Seattle found on momondo in the last 72 hours is R4 088.

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?
San Antonio and Seattle/Tacoma Intl are 2872,8 km apart from one another.
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 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 stopovers. 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 travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from San Antonio to Seattle?
Based on momondo bookings for flights between San Antonio and Seattle, the leading plane model is Boeing 737-800, making up 16,36% of the total bookings. Other popular models include Airbus A220-300 with 12,73%, Boeing 737-800 Passenger/BBJ2 (winglets) with 12,73%, and Boeing 737 MAX 8 with 10,91%.

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Why use momondo?

Why should I use momondo to find a flight deal from San Antonio to Seattle?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from San Antonio to Seattle. momondo saves you time and could save you money on your trip.

Can I find flights from San Antonio to Seattle with flexible booking policies on momondo?

All flight searches from San Antonio to Seattle on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from San Antonio to Seattle?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from San Antonio.

I’m not ready to book a flight from San Antonio to Seattle right now. Can momondo alert me if prices change?

Yes. momondo can track prices for San Antonio to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.