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San Antonio

$80+ Cheap flights from Seattle to San Antonio (SEA - SAT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SAT
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to San Antonio are usually found in January or August, booked 69 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Seattle to San Antonio

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to San Antonio (SAT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 14, 2025.

Round-trip from

$195
(Southwest)

One-way from

$80
(Priceline)

Popular in

December

Cheapest in

January

Average price

$282

Good round-trip deal

$247 or less

Good one-way deal

$188 or less
From Seattle/Tacoma Intl to San Antonio
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One-way flight from Seattle/Tacoma Intl to San Antonio
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Highest demand for flights based on searches. 4% potential increase in price ($17 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to San Antonio.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to San Antonio.
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Find flight deals from Seattle to San Antonio

Cheapest flights from Seattle to San Antonio
Explore the most affordable flight options available from Seattle to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This Delta deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/117:10 amSEA - SAT
1 stop7h 59mDelta
Mon 9/156:02 pmSAT - SEA
1 stop7h 41mDelta
Deal found 8/14$195
This Frontier deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/188:31 pmSEA - SAT
2 stops14h 45mFrontier
Mon 9/228:20 pmSAT - SEA
1 stop6h 10mFrontier
Deal found 8/13$196
This FlightHub deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/88:43 pmSEA - SAT
1 stop12h 31mFrontier
Mon 10/138:20 pmSAT - SEA
1 stop17h 47mFrontier
Deal found 8/14$200
This Southwest deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:35 amSEA - SAT
2 stops13h 15mSouthwest
Sat 12/65:40 amSAT - SEA
1 stop6h 05mSouthwest
Deal found 8/12$206
This FlightHub deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/46:12 amSEA - SAT
1 stop11h 03mFrontier
Mon 9/88:20 pmSAT - SEA
1 stop6h 10mFrontier
Deal found 8/14$211
This Delta deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2512:45 pmSEA - SAT
1 stop9h 07mDelta
Sun 9/286:00 amSAT - SEA
1 stop8h 45mDelta
Deal found 8/12$217
This FlightHub deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/186:12 amSEA - SAT
1 stop11h 03mFrontier
Sun 9/218:20 pmSAT - SEA
1 stop6h 10mFrontier
Deal found 8/14$219
This Delta deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/305:30 amSEA - SAT
1 stop6h 09mDelta
Tue 9/212:41 pmSAT - SEA
1 stop8h 19mDelta
Deal found 8/12$221
This Southwest deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/106:45 amSEA - SAT
2 stops9h 30mSouthwest
Sat 9/136:10 pmSAT - SEA
1 stop6h 20mSouthwest
Deal found 8/12$222
This KAYAK deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/812:46 pmSEA - SAT
Nonstop4h 10mHawaiian Airlines
Tue 10/146:40 amSAT - SEA
Nonstop4h 29mHawaiian Airlines
Deal found 8/12$223
This Expedia deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/88:43 pmSEA - SAT
1 stop12h 31mMultiple Airlines
Mon 10/136:40 amSAT - SEA
Nonstop4h 29mMultiple Airlines
Deal found 8/14$227
This Frontier deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/218:35 pmSEA - SAT
2 stops14h 41mFrontier
Thu 9/258:20 pmSAT - SEA
1 stop6h 10mFrontier
Deal found 8/14$228

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to San Antonio 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, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2025.
Use the filters below to find and compare flights from Seattle to San Antonio that are best for you.

Fly from

Seattle

Fly to

San Antonio

Route

Depart

Return

Price

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Sun 9/28

11:10 pm-10:20 am

1 stop9h 10m

San Antonio

Tue 9/30

6:40 pm-11:10 pm

1 stop6h 30m

$195

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Wed 9/10

12:15 pm-11:54 pm

1 stop9h 39m

San Antonio

Mon 9/15

6:05 pm-11:59 pm

1 stop7h 54m

$195

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Fri 10/24

11:10 pm-9:59 am

1 stop8h 49m

San Antonio

Tue 10/28

5:25 am-2:35 pm

1 stop11h 10m

$195

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Thu 9/11

10:45 pm-8:55 am

1 stop8h 10m

San Antonio

Sun 9/14

8:50 pm-1:20 am

1 stop6h 30m

$195

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Wed 9/10

9:45 pm-9:32 am

1 stop9h 47m

San Antonio

Sun 9/14

6:05 pm-11:59 pm

1 stop7h 54m

$195

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Fri 9/19

12:45 pm-11:52 pm

1 stop9h 07m

San Antonio

Mon 9/22

6:05 pm-11:59 pm

1 stop7h 54m

$195

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Thu 10/30

12:45 pm-11:46 pm

1 stop9h 01m

San Antonio

Tue 11/4

3:04 pm-11:54 pm

1 stop10h 50m

$195

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Thu 9/11

5:30 am-1:32 pm

1 stop6h 02m

San Antonio

Mon 9/15

4:00 pm-10:25 pm

1 stop8h 25m

$195

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Thu 9/11

6:12 am-7:15 pm

1 stop11h 03m

$80

SeattleSan Antonio

SEA - SAT

SEASAT

Seattle/Tacoma Intl

Sun 9/7

6:12 am-7:34 pm

1 stop11h 22m

$84

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 19 results
1
2

The best insider tips for Seattle to San Antonio flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Seattle to San Antonio trip
Airports
SEA

Plan to arrive at SEA at least two hours before your flight due to potentially long security lines.

Read more about SEAby Brandon Schultz
SAT

Use rideshare services from SAT for a convenient and quick 15-minute trip to downtown San Antonio.

Read more about SATby Ramsey Qubein
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on SAT

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more
Brandon Schultz

Brandon Schultz

Expert on SEA

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to San Antonio. Price data was last updated on August 8, 2025.

Booking 69 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to San Antonio. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, August is the cheapest month in which you can book a flight from Seattle to San Antonio (average of $295). Flying from Seattle to San Antonio in March is currently the most expensive (average of $376). 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?

Find hourly flight availability from Seattle to San Antonio. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 31% on flights from Seattle to San Antonio by exploring options for tickets at noon.

What is the cheapest day to fly from Seattle to San Antonio?

Use this chart to determine the cheapest time to fly round-trip from Seattle to San Antonio. Price data was last updated on August 10, 2025.

Travelers seeking maximum savings on their Seattle to San Antonio flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

What’s the top layover airport for flights from Seattle to San Antonio?

Share of 1-stop round-trip flights from Seattle to San Antonio chosen by Cheapflights users in the past 12 months, using the same layover each way.

Las Vegas (LAS) – chosen by Cheapflights users on 56% of 1-stop itineraries from Seattle to San Antonio on Cheapflights.

What’s the cheapest layover airport for flights from Seattle to San Antonio?

Average round-trip fare for 1-stop flights from Seattle to San Antonio, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $284.

What’s the fastest layover option from Seattle to San Antonio?

Shortest average travel time for 1-stop one-way flights from Seattle to San Antonio, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Dallas (DFW) have the shortest average one-way travel time for 1-stop routes: 6h 22m.

Which airport typically offers the quickest layover for flights from Seattle to San Antonio?

Average layover duration for 1-stop one-way flights from Seattle to San Antonio, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Dallas (DFW) offer the fastest connection on this route, with an average layover time of 1h 28m.

Reviews of airlines servicing San Antonio

Get insights into the airlines that provide service to San Antonio. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Antonio. Reviews last updated August 14, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta from Seattle to San Antonio by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.1

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.1

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,244 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.1

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.1

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,916 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.1

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.1

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

Find useful and relevant information for your journey from Seattle to San Antonio. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Seattle to San Antonio?

    San Antonio is the airport most travelers will use when flying to San Antonio from Seattle/Tacoma Intl. Booking flights from Seattle/Tacoma Intl (SEA) to San Antonio (SAT) should be relatively easy as there are 4 daily flights to San Antonio from 8 different airlines. 3h 58m is how long a flight from Seattle to San Antonio will take if you book a nonstop flight.

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

    Within the past month, 10 users have taken a look at flights from Seattle/Tacoma Intl to San Antonio.

  • What are the cheapest airlines flying from Seattle to San Antonio round-trip?

    Currently priced at $107, Spirit Airlines will fly you from Seattle to San Antonio and back. In addition to Spirit Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Frontier and Delta - these airlines can fly you to your destination from $129 and $176, respectively. Users have found that Spirit Airlines is 69% cheaper than the other options available to this destination.

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

    Before booking your flight to San Antonio from Seattle, check out the most reliable airlines to get you to your destination on time: Condor (100%), Air Tahiti Nui (77%), Alaska Airlines( 74%).

  • What are the cheapest flights from Seattle to San Antonio?

    Looking for the cheapest flight from Seattle to San Antonio? While on average our users pay $307, our data indicates the cheapest price to be $138. The most popular route (Seattle/Tacoma Intl - San Antonio), is priced around $176.

  • Where are the most common layover locations when flying from Seattle to San Antonio?

    Of the flights from Seattle to San Antonio that have layovers, most of them stop in Salt Lake City.

  • What are some popular things to do or see while on a layover in Salt Lake City?

    Temple Square, Salt Lake Temple, and Hogle Zoo are currently the most popular points of interest in Salt Lake City at the moment. Temple Square, Salt Lake Temple and Hogle Zoo are located about 4.7 mi, 4.8 mi, and 9.1 mi, respectively from Salt Lake City if you are interested in checking them out. Those landing in Salt Lake City looking to spend some time exploring during their layover can rent a car for about $61 per day.

  • Where are the least popular layover locations for Seattle to San Antonio flights?

    The least popular layover on flights from Seattle to San Antonio is Dallas.

  • 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, August is the cheapest month in which you can book a flight from Seattle to San Antonio (average of $295). Flying from Seattle to San Antonio in March is currently the most expensive (average of $376). 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

Traveling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
New Braunfels
Kerrville

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Alternative routes for Seattle to San Antonio

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Seattle to San Antonio

Discover the top 8 airlines that operate flights from Seattle to San Antonio. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$107Average$196FlexibilityNo cancel feeOn-time65%
FrontierCheapest$129Average$234FlexibilityNo cancel feeOn-time62%
DeltaCheapest$176Average$262FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$196Average$293FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$215Average$376FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$216Average$336FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$222Average$385FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$236Average$427FlexibilityNo cancel feeOn-time75%

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