SEA - SAT

$80 Find Cheap Flights from Seattle to San Antonio

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to San Antonio departing on 5/7. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to San Antonio.
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Everything you should know

Cheapest round-trip
$238
Typical prices: $494-$281
Frontier
Thu 4/16Wed 4/29
SEA - SAT • 2 stops
Cheapest non-stop
$317
Typical prices: $497-$297
Alaska Airlines
Sat 5/2Tue 5/12
SEA - SAT • Non-stop
Advice from real travelers
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
Top airlines
Cheapest • from $238 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Alaska Airlines. Average duration is 4h 14m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $257 (round-trip)
Shortest trip • 6h 00m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 42% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 24% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Antonio!
Flight Deals
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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

Thu, Apr 16 - Wed, Apr 29
Frontier Logo
4:20 pm - 9:24 am
SEA
-
SAT
15h 04m
2 stops
Frontier Logo
4:49 pm - 9:27 am
SAT
-
SEA
18h 38m
1 stop
$238Frontier
Sun, May 3 - Mon, May 11
Frontier Logo
7:12 pm - 2:15 pm
SEA
-
SAT
17h 03m
1 stop
Frontier Logo
8:59 pm - 9:49 am
SAT
-
SEA
14h 50m
2 stops
$239Frontier
Wed, Apr 29 - Sat, May 2
Frontier Logo
7:12 pm - 2:15 pm
SEA
-
SAT
17h 03m
1 stop
Frontier Logo
4:04 pm - 9:27 am
SAT
-
SEA
19h 23m
1 stop
$240Frontier
Mon, May 11 - Mon, May 18
Frontier Logo
11:37 am - 8:14 pm
SEA
-
SAT
6h 37m
1 stop
Frontier Logo
7:54 pm - 9:49 am
SAT
-
SEA
15h 55m
1 stop
$241Frontier
Wed, Apr 15 - Fri, Apr 17
Delta Logo
9:50 am - 5:12 pm
SEA
-
SAT
5h 22m
1 stop
Delta Logo
12:39 pm - 4:48 pm
SAT
-
SEA
6h 09m
1 stop
$242Delta
Fri, Apr 10 - Wed, Apr 15
Frontier Logo
9:34 pm - 12:19 am
SEA
-
SAT
24h 45m
2 stops
Frontier Logo
4:49 pm - 9:27 am
SAT
-
SEA
18h 38m
1 stop
$245Frontier
Thu, May 28 - Sun, Jun 7
Delta Logo
6:00 am - 5:16 pm
SEA
-
SAT
9h 16m
1 stop
Delta Logo
6:03 pm - 11:59 pm
SAT
-
SEA
7h 56m
1 stop
$247Delta
Tue, May 5 - Sun, May 10
Frontier Logo
7:50 pm - 6:59 pm
SEA
-
SAT
21h 09m
1 stop
Frontier Logo
9:09 pm - 9:49 am
SAT
-
SEA
14h 40m
2 stops
$249Frontier
Thu, Apr 23 - Thu, Apr 30
Southwest Logo
2:50 pm - 11:30 pm
SEA
-
SAT
6h 40m
1 stop
Southwest Logo
8:30 pm - 12:55 am
SAT
-
SEA
6h 25m
1 stop
$250Southwest
Mon, May 25 - Wed, Jun 10
Delta Logo
6:00 am - 5:20 pm
SEA
-
SAT
9h 20m
1 stop
Delta Logo
4:44 pm - 11:59 pm
SAT
-
SEA
9h 15m
1 stop
$251Delta
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.

How much is a round-trip flight from Seattle to San Antonio?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to San Antonio departing in April.

What’s the cheapest day of the week to fly from Seattle to San Antonio?

The average price of all round-trip flights from Seattle to San Antonio clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Seattle to San Antonio, look for departures on Wednesdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from San Antonio, Thursday is the cheapest day to fly and Monday is the most expensive.

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 $256 (return) on average. On the other hand, the most expensive months are March and November, where the average cost of round-trip tickets is $400 and $396 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 $349 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 42% 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.
Our travel experts
Brandon Schultz

Brandon Schultz

Expert on SAT

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.

Harriet Baskas

Harriet Baskas

Expert on SEA

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.

Good to know

Low seasonAugust
Cheapest flight$80
Best time to beat the crowds with an average 25% drop in price.
Most popular time to fly with an average 10% increase in price.
Flight from Seattle to San Antonio

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.

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

    In the last 3 days, the lowest price for a flight from Seattle to San Antonio was $80 for a one-way ticket and $238 for a round-trip.

  • Do I need a passport to fly between Seattle and San Antonio?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from Seattle to San Antonio?

    When flying out of Seattle you will be using Seattle/Tacoma Intl. You will be landing at San Antonio, also known as San Antonio.

  • 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?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Seattle and San Antonio, with Star Alliance being the most commonly used for this route.

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

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

  • Which is the best airline for flights from Seattle to San Antonio, Southwest or Alaska Airlines?

    The two airlines most popular with KAYAK users for flights from Seattle to San Antonio are Southwest and Alaska Airlines. With an average price for the route of $334 and an overall rating of 8.0, Southwest is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $392 and an overall rating of 7.9.

  • 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. Booking your flights between Seattle and SAT can sometimes prove cheaper using this method.

  • 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

  • Looking for a cheap flight? 25% of our users found flights on this route for $218 or less one-way and $397 or less round-trip.
  • 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 direct 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 direct flights

Reviews of the top 5 airlines serving 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
SouthwestOverall score based on 4331 reviews
8.6Crew
7.0Food
7.5Entertainment
8.1Boarding
8.0Comfort
Airline reviews

I elected to pay for the upgrades and found very little difference

6.0 GoodChris, Mar 2026
DAL - SAT
Read more Southwest reviews

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

Snacks are always pretzels. Why can't you also offer peanuts ?

Flight was hours late, unable to sit next to spouse, I have had so much better experiences. Substantially better, only saving grace was that it was a short flight.

An entire day of delays. Cost lots of money. Meals and a hotel.

Only downside was the legroom and seat width, which is always a problem unless I spend more for a premium seat.

Great flight but super high price. Glad it was a business trip and not personal

On time. Friendly staff. Took to long to pre bord all the specialty groups. Cramped small plane

No delays and arrived to destination 30 min early. Staff was super friendly.

Everything a cheap airline should be at normal airline rates.

It was a bumpy flight but the crew was very attentive and made it a safe and enjoyable experience.

Very easy, stress free airline. Was a wonderful experience. Will use again

The final trip home wasn’t as bad as the trip there. Even with the paid upgrade the comfort level was mediocre at best.

I paid $129 to be upgraded to better seat only ti be completely ignored by flight attendants I think because I used the front restroom ???? I was dozing off and on but I was never once offered a beverage or snack but my seat mates were served numerous double vodkas. I want my money back. I tried to call Alaska Airlines complaints phone number and was told it was 2.5 hours to hold.

Don’t fly with Alaska if you have a layover in Seattle. Guaranteed to screw you over. We waited at terminal S3 &were >2 hours delayed(mechanical issues)and told to change terminals to a different plane that required riding 3 shuttles to get to new terminal N14. Then they delayed the flight even further and changed gates again. when I went to the customer service in terminal N, the manager turned me away without apologizing & refused to assist me but mandated I leave her alone as her shift is nearly finished and insisted I totake another 2 shuttles to terminal C so I can just talk to another service rep while dragging my family of 4/ kids in tow.

i canceled my flight from SEA to SFO, SNA to SEA and received full refund from Alaska Airlines. i am pleased with the customer service.

Departing flight for our weekend trip was cancelled due to weather which meant our return flight was useless. The whole thing was difficult to get support through but Alaska did recover and was able to reimburse us for the flights yesterday. For some reason, Kayak was not kept in the loop, adding to the confusion.

i canceled my return flight package with Alaska Airlines. Customer Service was excellent and assisted me to cancelled both of our reservations and returned the payment in full. that is excellent service and understanding and empathy of the customers' needs. i like Alaska Airlines and recommend AS to everyone.

Never got on because the airline sent the WRONG plane to take us on our first leg of the trip so we missed ALL connecting flights. No help available from anyone at the airline…

The crew inside the airport for Alaska was rude, lazy and incompetent

Snacks and included beverages were appreciated. Boarding went smoothly. Plenty of overhead bin space. Seats get very uncomfortable after a couple of hours. After waiting 10 painful minutes for my walker, a very nice Delta guest agent pushed me in a wheelchair to the gate. It was finally delivered to me after another 15 minutes . Our checked bag was on the carousel long b4 I was able to retrieve it. Fortunately it was still there but somewhere along the way the straps we used to secure it were removed and and were not reattached. Wish I had made note of the agents name.

Smaller plane for a longer flight than my first one. Doesn’t make sense.

The cabin temperature was nice and cool. The wifi was not working.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

Could not get my connecting flight boarding pass until four hrs before departure! Ver annoying especially since the staff could not explain why!

First flight out and was 85 minutes delayed. Notification came out way too late

Delta flights recently are always delayed AND at jfk tney get the gates further away (need To walk 20’ to get to them/all the way at the end of the terminal). Not sure whats happening but price doesnt match experience!

Was forced to check in my small carry on, even though I informed the crew it has very fragile items inside

Only freetext wifi was available in flight; browsing WiFi required payment. Since the seats had no in flight entertainment, Delta should revisit this policy on this longer flight.

First class and monitors weren’t working for mine & my husbands. Eventually fixed, but quite annoyed as we bought first class. Also, No foot rests.

It isvvery small flight. No leg room . No space to put my personal item at feet.

My flight was canceled a few hours before boarding. I was rebooked on Copa airlines and missed an important meeting .

Everything was on time and service on the flight was great!

The travel company that you have on your site did me so wrong. I don’t know how it happened, but they put my son‘s name on my plane ticket flying to Vietnam. Along with his birthday. They would not have let me fly from Fort Myers to Ho Chi Minh City. I don’t think that I can ever use your service again. I typed my information into the browser along with my passport number and four days before I’m leaving I have to quickly search another ticket to fly out here.

Good flight. Efficient boarding and competent flight crew. No problems until we arrived at our destination gate. We were early so there was an aircraft at the gate that had to move before we could pull in. Then, due to the type of aircraft we flew, the cabin door could not be opened until some luggage from the cargo bay was offloaded to preserve center of gravity characteristics. So, that further delayed deplaning. Despite being 20 minutes early on landing, we ended up being 5 to 10 minutes late after all the delays.

This trip did not start off well. The inbound flight was delayed about 20 minutes. Then, after initial onboarding, the passengers had to deplane due to a mechanical problem. That took about 30 minutes to fix and be cleared. Then, reboarding was chaotic. It took a long time to sort passengers and two passengers on standby were ticketed but there was no seat. So, they had to deplane. One of the flight crew was trying to help passengers figure out a place to put their carry-on bags and that took more time. In the end, our scheduled 10:30 am departure did not actually take off until about 12:05 pm CST. The flight itself was long but we got to Houston. Some passengers missed their connecting flights and had to rebook. Not the best of flights I've had.

Complimentary light meal would be appreciated. But great flight crew service on all legs

Everything was great except for the boarding process. Everyone is lining up all at the same time and it’s hard to tell between the groups as they are way too large.

Very old flight - time to retire it for newer airplanes

Do not like the size of the overhead bin. I think staff should monitor the size of suitcases that are being carried on by passengers to ensure they meet the size requirement.

The flight attendant in business class was excellent! Professional, friendly and attentive.

Terrible planning. And even worse gate agents. Absolutely rude behavior.

Rough flight No beverage service due to turbulence Bottom Seat cushion was non existent

They put me on an earlier and I got home sooner

Not good. One of my luggage is missing. And until now they can’t find it

Delay after delay with little communication then AA lost my luggage and at airport would not assist just said scan this QR code to track your luggage and submit a claim. However QR code provided did not work so have to go back to airport

Where do I start!! I was delayed with my flight from Dallas to Tampa. On the way back from Tampa to Dallas the flight was delayed over 4 hours+. I was put on another flight that was also delayed but not as long. Traveling on American Airlines is becoming exhausing.

Dloght delayed by 2.5 hrs . Common theme in my last four american floghts

The flight attendants and the service is getting worse by the day.

They are rarely on time! Very hard to plan your travels when flights or connections keep getting delayed.

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

Information on your arrival and departure airports