Cheap Flights from Seattle to San Antonio International

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Find the cheapest month or even day of the year to fly to San Antonio International

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Flight deals from Seattle to San Antonio International Airport

Looking for a cheap last-minute deal or the best return flight from Seattle to San Antonio International Airport? If you want to travel next month, return fares start from $325. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Seattle to San Antonio International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle to San Antonio International flights are currently cheapest in May.

Direct flights from Seattle to San Antonio International

Seattle to San Antonio International: Alternative routes

Compare routes from Seattle to San Antonio below. You may find an airport to fly into that's cheaper, faster, or easier than San Antonio International.

Seattle to San Antonio: Flight information

The things to know before you go.
Cheapest flight found$151
Cheapest month to flyMay
Average flight time4 hrs, 7 mins
Most popular airlineAlaska Airlines
Average flights per week28

Finding cheap flights from Seattle to San Antonio International: Frequently asked questions

The best price we found for a return flight from Seattle to San Antonio International is $325. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
4 hours and 7 minutes is the average flight time from Seattle to San Antonio International.
Alaska Airlines, Qatar Airways and Condor fly direct from Seattle to San Antonio International.
As of April 2026, there are 28 flights per week flying from Seattle to San Antonio International.
The cheapest month to fly from Seattle to San Antonio International is usually May.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to San Antonio International Airport on Thursday, 7 May 2026.
Yes – the average flight time is 4 hours and 7 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Antonio International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Antonio is around 40 days in advance, so don’t leave your flight to the last minute.

Travelling from Seattle to San Antonio International Airport (SAT): What you need to know

  • Your adventure will begin at Seattle-Tacoma International Airport (SEA), the main airport in Seattle. Search for flights from Seattle to San Antonio International Airport (SAT) that leave from this terminal.

  • Book a direct Seattle to San Antonio International Airport flight and you'll be in the air for an average of 4 hours 5 minutes.

  • San Antonio International Airport is located in San Antonio. The city is in the UTC-6 timezone and is two hours ahead of Seattle.

  • The most popular route is from Seattle-Tacoma International Airport (SEA) to San Antonio International Airport (SAT). You can choose from 10 direct services each week. Alaska Airlines operates a 7:59am departure between SEA and SAT.

  • Your flight from Seattle to SAT won't wait if you're running late, so show up at the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead when you're travelling internationally.

  • With more travellers during peak months like July, get to the terminal earlier than usual. Two hours for domestic flights and up to four for international journeys will help you stay ahead of the crowds. Remember things also get busy during major holidays like Christmas and local events or festivals.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • Fly without interruptions from Seattle-Tacoma International Airport (SEA). Nonstop flights from Seattle to San Antonio International Airport (SAT) can be booked from here.

  • When taking off from SEA, you can take a direct flight from Seattle to San Antonio International Airport with Alaska Airlines.

  • Alaska Airlines is the airline most travellers choose for flights from SEA to SAT.

  • With 77.37% of services landing as planned, Alaska Airlines is the best performing carrier for punctuality on this route.

  • Located around 23 kilometres from central Seattle, SEA can be reached in about 25 minutes by car, depending on traffic. The journey on public transport will take roughly 35 minutes.

  • Want a leisurely start to your holiday? Stay near Seattle-Tacoma International Airport. Whether you're catching an early flight from Seattle to San Antonio International Airport or just don't want to be rushed, these hotels are the ideal choice:

  • Seattle-Tacoma International Airport scores high marks for its on-time performance. 80% of flights that depart SEA reach their destination without delay.

Seattle Paine Field International Airport (PAE)

  • PAE is about 40 kilometres from central Seattle. It'll take 40 minutes or so to get to the airport in a car from the city centre. Public transport takes roughly 1 hour 30 minutes.

  • Got an early start? You might like to check in to one of these accommodation options near Seattle Paine Field International Airport the day before your Seattle to SAT flight:

  • Seattle Paine Field International Airport is known for its commitment to punctuality. 80% of flights out of here land when expected.

About San Antonio International Airport (SAT)

Getting from San Antonio International Airport (SAT) to central San Antonio

  • From San Antonio International Airport, central San Antonio is around 14 kilometres away. It takes about 20 minutes to get to the city centre by car.

  • Travelling by public transport takes about 50 minutes.

How to find the cheapest flights from Seattle to San Antonio International Airport (SAT)

  • $151 is the best price for a one-way ticket from Seattle to San Antonio International Airport. Return flights start at $325. These prices can change depending on availability.

  • Book one month before you want to fly. Pricing trends suggest that this is the ideal window for finding cheap flights from Seattle to SAT.

  • The best month for landing cheap Seattle to San Antonio International Airport tickets is June. Use the 'Whole month' tool to compare flight prices, then choose the dates with the lowest fares.

  • You don't need to search every day to find out if prices have dropped when you set up a Price Alert. We'll let you know when a better deal is available on plane tickets from Seattle to SAT.

  • Lock in a cheap flight from Seattle to San Antonio International Airport by using filters. Choose your preferred times, number of stops and airlines, then sort the results by 'Cheapest' for the best deals.

The best time to fly from Seattle to San Antonio International Airport (SAT)

  • It's time to figure out your travel dates for your flight from Seattle to San Antonio International Airport (SAT). July is the peak month for travel to San Antonio. If you like things a bit more low-key, head there in December.

  • When booking your Seattle to SAT plane ticket, consider what kind of weather works for you. August is the warmest month in San Antonio, with temperatures ranging from 24ºC to 40ºC.

  • If you like travelling in cooler conditions, look for a cheap ticket from Seattle to San Antonio International Airport in January when temperatures are between 4ºC and 20ºC.

More about San Antonio

  • Once you've booked your flight from Seattle to San Antonio International Airport, find a hotel that offers the right mix of comfort and location. Make one of these options your base for exploring San Antonio:

  • Your San Antonio trip should come with a side of sightseeing. Big-name attractions that should be on your list include San Antonio River Walk, San Antonio River walk and Alamo Plaza.

Explore more of the United States

  • Austin is just one of the many cities in the United States waiting to be explored once you've taken in the sights of San Antonio. Around 105 kilometres away to the northeast, its top attractions include Texas State Capitol, Austin Museum of Art, Downtown and 360 Bridge.

  • Corpus Christi is another essential stop in the United States and is around 225 kilometres southeast of San Antonio. No trip is complete without a visit to USS LEXINGTON, Texas State Aquarium and Bayfront Park.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.