SEA - SAT

Find cheap flights from Seattle to San Antonio

1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Antonio

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to San Antonio, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to San Antonio, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
Multiple Airlines
Thu 18/12
SEA - SAT • multi-stop
Cheapest one-way flights
Multiple Airlines
Thu 18/12
SEA - SAT • multi-stop
Our travellers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
Use SEA Spot Saver for faster security at SEA.
Take the #5 VIA bus from SAT to downtown San Antonio.
Expert advice
Expert advice
Expert advice
Expert advice
When to book
4 weeks
in advance
Our data shows that travellers who book at least 4 weeks in advance save around 36% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
August
Cheapest • 26% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to San Antonio!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Seattle to San Antonio (SEA-SAT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to San Antonio that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to San Antonio

Multiple Airlines Logo
SEA
-
SAT
4591 kmmulti-stop
Multiple Airlines Logo
SAT
-
SEA
4591 kmmulti-stop
Multiple Airlines
Booking Insights

KAYAK's insights & trends for Seattle to San Antonio flights

Get data-powered insights and trends into flights from Seattle to San Antonio to help you find the cheapest flights, the best time to fly and much more.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to San Antonio, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to San Antonio is August, where tickets cost C$ 353 (return) on average. On the other hand, the most expensive months are December and May, where the average cost of round-trip tickets is C$ 650 and C$ 573 respectively.

Can I save money by flying with a layover from Seattle to San Antonio?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at C$ 271 on average.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to San Antonio, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to San Antonio, you should book around 4 weeks before departure, which saves you about 36% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Expert advice

Expert advice for your flight from Seattle to San Antonio

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airports
SEA

Use the SEA Spot Saver for expedited security screening without TSA PreCheck. Book online or via the flySEA app for free access to dedicated lanes.

SAT

Take the #5 VIA bus from SAT to downtown San Antonio. It's affordable, takes about 30 minutes, and has plenty of room for luggage.

Our travel experts
Brandon Schultz

Brandon Schultz

Expert on SAT

Brandon Schultz

Brandon Schultz

Brandon travels every week and makes friends with stray cats wherever he goes. Dogs, too... he once brought one home to the US from the Amalfi Coast. He’s written 6 books, visited 6 continents (still waiting on Antarctica), and would eat ice cream 6 times a day if he could. He lives in Brooklyn, New York, with his partner and three cats.

Read more
Harriet Baskas

Harriet Baskas

Expert on SEA

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more

Good to know

Low seasonAugust
Best time to beat the crowds (26% less expensive on average)
Most popular time to fly (36% more expensive on average)

When to book flights from Seattle to San Antonio

Are your dates flexible? Find out the best times to travel from Seattle to San Antonio based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to San Antonio

  • Can I find long-term parking at Seattle Tacoma International Airport?

    SEA Airport has over 12,000 parking spaces for anyone looking to leave their car at the airport. These parking spaces are easily accessible from International Blvd and have bridges and pathways leading to the airport terminal. There is an option to reserve parking days before your flight, and if you’re a frequent flyer, you can qualify for discounts and other perks.

  • How do I make my flight from Seattle to San Antonio more sustainable?

    While flying is not the most sustainable way to travel, it is very difficult to avoid. Therefore, the onus is on you to make your flight more sustainable and do your best for the environment. You can start by booking a direct flight instead of connecting flights since connecting flights are often longer and result in more carbon emissions. Another way to make your trip more sustainable is by flying economy. It has a higher capacity and therefore carries more people reducing the number of overall flights.

  • How do I get wheelchair assistance at San Antonio International Airport?

    San Antonio International Airport offers free wheelchair services to anyone that may require one. To get these services, you will need to inform your airline or travel agent at least 48h before your flight is set to depart. That way, they will mark your record with a note informing the airport officials that you require special assistance. Upon seeing the information, the airport officials will make the necessary arrangements to ensure that you get a wheelchair as soon as your plane lands.

  • What is the fastest way to Seattle Tacoma International Airport from Downtown Seattle?

    Sea-Tac Airport is about 13 miles away from downtown Seattle. While there is a light rail that goes directly from Downtown to the airport, road transport provides the quickest way. Assuming normal traffic and weather conditions, it should take about 15min to get to the airport using the I-5S. A cab or driving to the airport would be most appropriate.

  • Which airlines offer Wi-Fi service onboard planes from Seattle to San Antonio?

    Alaska Airlines, Delta, Hawaiian Airlines, and American Airlines offer inflight Wi-Fi service on the Seattle to San Antonio flight route.

  • Which aircraft models fly most regularly from Seattle to San Antonio?

    The Boeing 737 MAX 9 is the aircraft model that flies most regularly on the Seattle to San Antonio flight route.

  • Which airline alliances offer flights from Seattle to San Antonio?

    oneworld is the only airline alliance operating flights between Seattle and San Antonio.

  • On which days can I fly direct from Seattle to San Antonio?

    There are direct flights from Seattle to San Antonio on a daily basis.

  • How does KAYAK find such low prices on flights from Seattle to San Antonio?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to San Antonio.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to San Antonio?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Antonio from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to San Antonio?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Antonio with an airline and back to Seattle with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to San Antonio?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Antonio from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Seattle to San Antonio

  • When flying out of Seattle Tacoma International Airport (SEA), ensure that you arrive at least 3h before your flight departs. This should give you enough time to navigate the long lines at the airport without risking missing your flight.
  • Delta Air Lines has a hub in Seattle Tacoma International Airport. For that reason, you should consider booking your flight with them since they always have more flight options than any other airline.
  • To enjoy the lounge facilities at SEA Airport, consider booking with Alaska Airlines, Delta, or United Airlines. They each have a lounge at the airport where you can hang out while waiting to board your flight.
  • San Antonio International Airport (SAT) has pet relief areas inside and outside the airport. The outdoor ones are the most conveniently located for arriving passengers and can be found at Terminal A on the 0 level of the hourly parking garage and Terminal B towards the baggage claim exit.
  • If you’re looking for specific in-flight services such as Wi-Fi, confirm that they are available during booking. Different flights tend to offer different services to passengers even when serviced by the same airline.

Prefer to fly direct from Seattle to San Antonio?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Seattle/Tacoma Intl to San Antonio.
Find which airlines fly direct from Seattle/Tacoma Intl Airport to San Antonio Airport, which days they fly and book direct flights.

Direct departures

Seattle/Tacoma Intl to San Antonio

Monday

Alaska Airlines

Alaska Airlines

Tuesday

Alaska Airlines

Alaska Airlines

Wednesday

Alaska Airlines

Alaska Airlines

Thursday

Alaska Airlines

Alaska Airlines

Friday

Alaska Airlines

Alaska Airlines

Saturday

Alaska Airlines

Alaska Airlines

Sunday

Alaska Airlines

Alaska Airlines

See more nonstop flights

Direct returns

San Antonio to Seattle/Tacoma Intl

Monday

Alaska Airlines

Alaska Airlines

Tuesday

Alaska Airlines

Alaska Airlines

Wednesday

Alaska Airlines

Alaska Airlines

Thursday

Alaska Airlines

Alaska Airlines

Friday

Alaska Airlines

Alaska Airlines

Saturday

Alaska Airlines

Alaska Airlines

Sunday

Alaska Airlines

Alaska Airlines

See more nonstop flights

Reviews of the top airline flying from Seattle to San Antonio

 
See real verified KAYAK customer reviews for airlines flying from Seattle to San Antonio. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to San Antonio? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 11477 reviews
7.0Entertainment
8.5Crew
8.1Boarding
7.8Comfort
7.1Food
Airline reviews

The plane was delayed which was annoying. No seat back screens is a bummer. Staff if great

8.0 ExcellentAnonymous, Dec 2025
SEA - SFO
Read more Alaska Airlines reviews

The plane was delayed which was annoying. No seat back screens is a bummer. Staff if great

I got my seat changed last minute so a parent coumd sit with their child wich i found out was a teenager

I wish you would have just canceled the Saturday flight from sea to rdd on Dec 13. the diversion cost me more time and money than if I had just rebooked to Sacramento. It was a huge headache and cost.

There was no food or entertainment so quit asking about that! Everything else was fine.

I wasn’t assigned a seat until last minute even though I checked in 24 hours before the flight and was told I might not be able to get on the flight! The leg room and seat room in the flight was abysmal. The service both at boarding and on the flight was very mediocre and not particularly friendly.

Late boarding, older plane. Great flight, no issues. Very cold inside the plane.

The plane was old so the seats were very worn out. The seats were hard, uncomfortable, and caused me actual pain. The lights were too bright. The flight itself was fine.

1. Denial of Basic Needs (SEA): Upon arrival in Seattle, the wheelchair attendant refused my urgent request to use the restroom, insisting on scanning documents first. She eventually took me to a restroom but then abandoned me and my autistic son at an unstaffed, deserted gate for over four hours. When I called the accommodation line for help, I was told to "get someone's attention," which was impossible. My son, traumatized by the prospect of me yelling for help, was forced to wander the terminal to find assistance. 2. Revocation of Accommodations & Threats: At the gate, an agent stated I had no accommodations on file, despite my previous leg having them. When I showed the app (where my bulkhead seat was erased and replaced with Row 14), he denied the evidence. When I attempted to advocate for my immobilized leg, he threatened to "yank me from the flight" if I said one more word. He coerced me into agreeing that I was "asking for accommodations for the first time" before he would allow assistance, effectively forcing me to falsify the situation under duress. I complied only out of fear of being stranded in a strange city. 3. On-Board Negligence and Injury: Because my bulkhead seat was revoked, I was forced into Row 14. With my leg immobilized and unable to bend, it extended into the aisle. During boarding and the flight: 16 different passengers tripped over my injured leg. 6 rolled luggage bags were pulled over my injured leg. The Flight Attendant (FA) was one of the people who tripped and drove luggage over me. I reported the issue to the FA after 10 trips and 3 luggage impacts. He ignored me. He only addressed me later to ask me to move my immobilized leg for beverage service. I informed him again: "16 people have tripped, 6 luggage runovers, I cannot bend it." He provided no medical aid and no incident report. 4. Resolution and Trauma: Eventually, a different employee noticed my distress and my original paper boarding pass showing the correct bulkhead assignment. He asked me to move up. I broke down in tears, terrified that moving would cause the gate agent to remove me from the plane as threatened. We were eventually moved to the bulkhead, but the damage was done. My autistic son was traumatized by watching his mother be trampled and threatened. 5. Post-Flight: I called to report these injuries, but was disconnected after a 45-minute hold. I require a formal record of this injury and these violations.

Larger seats with a bit more room would be good! Thanks for all your hard work. I think we are all feeling a bit down these days economically and your positive attitudes, both from SJC to Seattle and from Seattle to Bozeman makes more of a difference than you can see! Thank you and Merry Christmas! I hope all your financial needs are met and that very good things come your way.

We flew economy, it was what I expected. The seats are too upright for me

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

Information on your arrival and departure airports