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Cheap flights from Seattle to San Antonio

SEA — SAT
11 Oct — 18 Oct1
1 adult
1 adult, Economy

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 11 September 2025.

Popular in

December

Cheapest in

January

Average price

C$ 414

Good round-trip deal

C$ 308 or less
Highest demand for flights based on searches. 5% potential increase in price (C$ 36 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 24 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to San Antonio.
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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
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 29 August 2025.

To ensure you get the cheapest price possible for a flight from Seattle to San Antonio, you should look to book at least 69 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, July is the cheapest month in which you can book a flight from Seattle to San Antonio (average of C$ 325). Flying from Seattle to San Antonio in May is currently the most expensive (average of C$ 443). 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 11 September 2025.

It’s typically best to fly out from Seattle to San Antonio at noon. Doing so could potentially save you 45% on the flight price compared to flying in the afternoon, which is usually more expensive.

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 11 September 2025.
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
8.0
Very good
10,000 reviews
Check prices

Crew

8.5

Boarding

8.1

Entertainment

7.0

Overall

8.0

Food

7.1

Comfort

7.8

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
Check prices

Crew

8.5

Boarding

8.1

Entertainment

7.0

Overall

8.0

Food

7.1

Comfort

7.8

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.

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

    The Seattle/Tacoma Intl to San Antonio flight path was viewed by 7 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    Alaska Airlines, at C$ 324, was found to be the cheapest airline from Seattle to San Antonio.. Users have found that Alaska Airlines is 33% 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: Air Tahiti Nui (73%), Alaska Airlines (70%), Hawaiian Airlines (68%).

  • 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, July is the cheapest month in which you can book a flight from Seattle to San Antonio (average of C$ 325). Flying from Seattle to San Antonio in May is currently the most expensive (average of C$ 443). 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.

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

Top airline flying from Seattle to San Antonio

Discover the top airline 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 629,999 searches. Data last updated 11 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapestC$ 324AverageC$ 557FlexibilityNo cancel feeOn-time75%
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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

Can Cheapflights find flights from Seattle to San Antonio with no change fees?

Yes, we can. To see specific flights from Seattle to San Antonio with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Seattle to San Antonio become cheaper?

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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