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Cheap flights from Seattle to San Antonio from C$ 215

SEA — SAT
23 Oct — 30 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to San Antonio

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to San Antonio

Tue 20/104:27 p.m. -
1 stop24h 59m
Mon 26/101:10 p.m. -
1 stop23h 49m
Deal found 19/9C$ 391
Fri 16/109:16 p.m. -
1 stop14h 36m
Sun 18/1010:34 p.m. -
1 stop13h 14m
Deal found 20/9C$ 428
Wed 21/101:19 p.m. -
1 stop6h 40m
Wed 28/101:52 p.m. -
1 stop6h 05m
Deal found 22/9C$ 435
Mon 23/113:13 p.m. -
1 stop6h 50m
Thu 26/117:45 a.m. -
1 stop9h 10m
Deal found 22/9C$ 442
Sat 24/1012:43 p.m. -
2 stops8h 08m
Tue 27/107:20 a.m. -
1 stop7h 00m
Deal found 20/9C$ 450
Wed 21/1012:05 p.m. -
2 stops7h 35m
Wed 28/106:40 a.m. -
2 stops8h 55m
Deal found 22/9C$ 457
Thu 22/101:19 p.m. -
1 stop6h 40m
Sun 25/105:30 a.m. -
1 stop6h 17m
Deal found 22/9C$ 459
Sat 7/1110:40 a.m. -
2 stops8h 25m
Sat 14/115:40 a.m. -
2 stops14h 55m
Deal found 23/9C$ 465
Sun 11/1011:59 p.m. -
1 stop6h 39m
Thu 15/106:54 p.m. -
1 stop8h 21m
Deal found 18/9C$ 468
Tue 20/102:15 p.m. -
1 stop6h 00m
Mon 26/103:55 p.m. -
2 stops8h 50m
Deal found 19/9C$ 469
Sat 21/113:05 p.m. -
1 stop6h 58m
Tue 1/127:01 a.m. -
1 stop10h 13m
Deal found 20/9C$ 473

Find flight deals from Seattle to San Antonio

Round-trip from

C$ 391

One-way from

C$ 215

Popular in

June

Cheapest in

February

Average price

C$ 499
Frontier
  • Frontier
  • 20/10-26/10
  • 2 total stops
  • 48h 48m total
  • Seattle to San Antonio
Search Deals
United Airlines
  • United Airlines
  • 14/10-31/12
  • 1 total stop
  • 6h 40m total
  • Seattle to San Antonio
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 106 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Seattle to San Antonio that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSan Antonio

SEA Seattle/Tacoma Intl - SAT San Antonio

SEASAT

Seattle/Tacoma Intl

Wed 14/10

1:19 p.m.-9:59 p.m.

1 stop6h 40m

San Antonio

Wed 31/12

12:00 a.m.-10:00 p.m.

Nonstop0h 00m

C$ 215

SeattleSan Antonio

SEA Seattle/Tacoma Intl - SAT San Antonio

SEASAT

Seattle/Tacoma Intl

Fri 16/10

6:00 a.m.-5:34 p.m.

1 stop9h 34m

San Antonio

Wed 31/12

12:00 a.m.-10:00 p.m.

Nonstop0h 00m

C$ 222
Quickest round-trip

SeattleSan Antonio

SEA Seattle/Tacoma Intl - SAT San Antonio

SEASAT

Seattle/Tacoma Intl

Sun 18/10

11:59 p.m.-8:38 a.m.

1 stop6h 39m

San Antonio

Wed 31/12

12:00 a.m.-10:00 p.m.

Nonstop0h 00m

C$ 222

SeattleSan Antonio

SEA Seattle/Tacoma Intl - SAT San Antonio

SEASAT

Seattle/Tacoma Intl

Tue 13/10

11:59 p.m.-8:38 a.m.

1 stop6h 39m

San Antonio

Wed 31/12

12:00 a.m.-10:00 p.m.

Nonstop0h 00m

C$ 222

SeattleSan Antonio

SEA Seattle/Tacoma Intl - SAT San Antonio

SEASAT

Seattle/Tacoma Intl

Sat 17/10

11:59 p.m.-8:52 a.m.

1 stop6h 53m

San Antonio

Wed 31/12

12:00 a.m.-10:00 p.m.

Nonstop0h 00m

C$ 222

SeattleSan Antonio

SEA Seattle/Tacoma Intl - SAT San Antonio

SEASAT

Seattle/Tacoma Intl

Tue 13/10

2:30 p.m.-12:13 a.m.

1 stop7h 43m

San Antonio

Wed 31/12

12:00 a.m.-10:00 p.m.

Nonstop0h 00m

C$ 253

SeattleSan Antonio

SEA Seattle/Tacoma Intl - SAT San Antonio

SEASAT

Seattle/Tacoma Intl

Wed 14/10

12:05 p.m.-9:40 p.m.

2 stops7h 35m

San Antonio

Wed 31/12

12:00 a.m.-10:00 p.m.

Nonstop0h 00m

C$ 260

SeattleSan Antonio

SEA Seattle/Tacoma Intl - SAT San Antonio

SEASAT

Seattle/Tacoma Intl

Thu 24/12

11:20 a.m.-11:40 p.m.

1 stop10h 20m

San Antonio

Wed 31/12

12:00 a.m.-10:00 p.m.

Nonstop0h 00m

C$ 267

SeattleSan Antonio

SEA Seattle/Tacoma Intl - SAT San Antonio

SEASAT

Seattle/Tacoma Intl

Wed 7/10

11:59 p.m.-9:43 a.m.

1 stop7h 44m

San Antonio

Wed 31/12

12:00 a.m.-10:00 p.m.

Nonstop0h 00m

C$ 273

SeattleSan Antonio

SEA Seattle/Tacoma Intl - SAT San Antonio

SEASAT

Seattle/Tacoma Intl

Wed 7/10

12:05 p.m.-10:15 p.m.

2 stops8h 10m

San Antonio

Wed 31/12

12:00 a.m.-10:00 p.m.

Nonstop0h 00m

C$ 280

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/9

Showing 1-10 of 23 resultsSorted by cheapest first
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Best time to book a flight from Seattle to San Antonio

Have a flexible travel schedule? Discover the best time to fly to San Antonio from Seattle with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Seattle to San Antonio

How far ahead should I book a flight from Seattle to San Antonio?

To ensure you get the cheapest price possible for a flight from Seattle to San Antonio, you should look to book at least 46 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Seattle to San Antonio?

Currently, February is the cheapest month in which you can book a flight from Seattle to San Antonio (average of C$ 407). Flying from Seattle to San Antonio in June is currently the most expensive (average of C$ 597). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to SAT?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to San Antonio as you normally would.

How much does it cost to fly round-trip from Seattle to San Antonio?

Airfare is typical for this route at the moment.

Seattle to San Antonio flights typically cost between C$ 374 and C$ 657 in October.
The cheapest round-trip price found within the last 5 days was C$ 391 on Frontier (20 Oct-26 Oct).

Reviews of airlines servicing San Antonio

See what other customers who have flown with Alaska Airlines from Seattle to San Antonio have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,956 reviews
Check prices

Overall

7.9

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.
Alaska Airlines
7.9
Good
12,956 reviews
Alaska Airlines
7.9
Good
12,956 reviews
Check prices

Overall

7.9

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.

Related info for your journey

  • How popular is this Seattle to San Antonio flight route?

    The Seattle/Tacoma Intl to San Antonio flight path was viewed by 1 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Seattle to San Antonio?

    There are many flights that can get you from Seattle to San Antonio in 6h 39m. Fly via United Airlines, Delta, or Southwest to get the fastest option. The distance between Seattle and San Antonio is about 2852 km. Both multi-stop and direct flights can be found to your destination and back.

  • What is the cheapest airline to fly from Seattle to San Antonio round-trip?

    Alaska Airlines, at C$ 299, was found to be the cheapest airline from Seattle to San Antonio.. Users have found that Alaska Airlines is 41% cheaper than the other options available to this destination.

  • What are the most reliable airlines from Seattle to San Antonio?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Seattle to San Antonio on time: Qatar Airways (81%), Alaska Airlines (64%), Condor (56%).

  • Can I find deals for flights from Seattle to San Antonio that include hotel bookings?

    Yes. In addition to deals on Seattle to San Antonio flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to San Antonio?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to San Antonio.

  • Can I find deals for business class flights from Seattle to San Antonio?

    Yes. Cheapflights offers flight deals from Seattle to San Antonio by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to San Antonio?

    Currently, February is the cheapest month in which you can book a flight from Seattle to San Antonio (average of C$ 407). Flying from Seattle to San Antonio in June is currently the most expensive (average of C$ 597). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Seattle to San Antonio

Seattle to Hobby flights
Seattle to George Bush Intcntl flights
Seattle to Dallas/Fort Worth flights
Seattle to Austin flights
Bellingham to Dallas/Fort Worth flights

Top airline flying from Seattle to San Antonio

AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapestC$ 299AverageC$ 417FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

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How does Cheapflights help users find flights from Seattle to San Antonio?

Deals for Seattle to San Antonio flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Seattle to San Antonio?

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to San Antonio for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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Not ready to book yet? You can track prices for flights from Seattle to San Antonio on Cheapflights with our Price Alert feature and get notified when better prices are available.

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