SJO - SEA

$174 Find Cheap Flights from San José to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San José to Seattle departing on 1/15. 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 Seattle

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

Cheapest round-trip
$405
Overall average: $610
United Airlines
Thu 12/25Sat 1/17
SJO - SEA • 2 stops
Cheapest one-way
$174
Typical prices: $310-$943
American Airlines
Thu 1/15
SJO - SEA • 1 stop
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 4% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
October
Cheapest • 15% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from San José to Seattle (SJO-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San José to Seattle 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 San José to Seattle

Thu, Dec 25 - Sat, Jan 17
United Airlines Logo
6:30 am - 11:12 pmSJO-SEA
18h 42m2 stops
United Airlines Logo
12:40 pm - 12:56 pmSEA-SJO
22h 16m2 stops
$405United Airlines
Find Deal
Mon, Jan 19 - Sat, Jan 31
Multiple Airlines Logo
7:45 am - 10:29 pmSJO-SEA
16h 44m1 stop
Multiple Airlines Logo
6:20 am - 11:15 pmSEA-SJO
14h 55m1 stop
$416Multiple Airlines
Find Deal
Wed, May 6 - Sun, May 17
Multiple Airlines Logo
8:50 am - 9:44 pmSJO-SEA
13h 54m1 stop
Multiple Airlines Logo
6:30 am - 11:35 pmSEA-SJO
16h 05m2 stops
$417Multiple Airlines
Find Deal
Tue, Dec 23 - Wed, Jan 7
United Airlines Logo
6:30 am - 9:17 pmSJO-SEA
16h 47m2 stops
United Airlines Logo
12:35 pm - 12:56 pmSEA-SJO
22h 21m2 stops
$419United Airlines
Find Deal
Tue, Mar 31 - Tue, Apr 7
Multiple Airlines Logo
3:05 pm - 11:14 pmSJO-SEA
33h 09m2 stops
Multiple Airlines Logo
9:45 am - 11:15 pmSEA-SJO
12h 30m1 stop
$421Multiple Airlines
Find Deal
Wed, Apr 8 - Wed, Apr 15
Avianca Logo
5:05 am - 11:14 pmSJO-SEA
19h 09m2 stops
Avianca Logo
6:20 am - 1:30 pmSEA-SJO
30h 10m2 stops
$423Avianca
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Thu, Mar 5 - Mon, Mar 9
United Airlines Logo
8:45 am - 11:28 pmSJO-SEA
16h 43m2 stops
United Airlines Logo
12:35 pm - 11:56 amSEA-SJO
22h 21m2 stops
$424United Airlines
Find Deal
Wed, Apr 22 - Mon, Apr 27
Multiple Airlines Logo
8:50 am - 9:44 pmSJO-SEA
13h 54m1 stop
Multiple Airlines Logo
7:55 pm - 8:40 amSEA-SJO
11h 45m2 stops
$425Multiple Airlines
Find Deal
Wed, Apr 22 - Mon, Apr 27
Multiple Airlines Logo
4:50 pm - 10:19 amSJO-SEA
18h 29m2 stops
Multiple Airlines Logo
7:55 pm - 8:40 amSEA-SJO
11h 45m2 stops
$426Multiple Airlines
Find Deal
Thu, Dec 25 - Sat, Jan 17
United Airlines Logo
6:30 am - 11:12 pmSJO-SEA
18h 42m2 stops
United Airlines Logo
10:58 am - 12:56 pmSEA-SJO
23h 58m1 stop
$430United Airlines
Find Deal
Booking Insights

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

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

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

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

For San José to Seattle, Wednesday is the cheapest day to fly on average and Monday is the most expensive. Flying from Seattle back to San José, the best deals are generally found on Tuesday, with Friday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San José to Seattle, 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 San José to Seattle is October, where tickets cost $476 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $643 and $610 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San José to Seattle, 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 San José to Seattle, you should book around 2 weeks before departure, which saves you about 4% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$174
Best time to beat the crowds but there is an average 8% increase in price.
Most popular time to fly with an average 8% increase in price.
Flight from San José to Seattle

When to book flights from San José to Seattle

Are your dates flexible? Find out the best times to travel from San José to Seattle 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 San José to Seattle

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

    In the last 3 days, the lowest price for a flight from San José to Seattle was $174 for a one-way ticket and $405 for a round-trip.

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

    Yes, you'll most likely have to show a valid passport before boarding the plane in San José and on arrival in Seattle.

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

    On your way to Seattle, you’ll fly out from San José Juan Santamaria Intl. You’ll be landing at Seattle/Tacoma Intl.

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

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the San José to Seattle flight route.

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

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

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

    The two airlines most popular with KAYAK users for flights from San José to Seattle are Alaska Airlines and United Airlines. With an average price for the route of $659 and an overall rating of 8.0, Alaska Airlines is the most popular choice. United Airlines is also a great choice for the route, with an average price of $527 and an overall rating of 7.4.

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

    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 San José to Seattle.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from San José 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 San José to Seattle?

    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 Seattle with an airline and back to San José with another airline. Booking your flights between San José and SEA 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 San José to Seattle?

    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 Seattle from San José up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from San José to Seattle

 
See real verified KAYAK customer reviews for airlines flying from San José to Seattle. 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 San José to Seattle? 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 11392 reviews
8.1Boarding
7.8Comfort
7.1Food
8.5Crew
7.0Entertainment
Airline reviews

Larger seats and more room would elevate the experience. Otherwise, it was good!

10.0 ExcellentAnonymous, Dec 2025SJC - SEA
Read more Alaska Airlines reviews

Larger seats and more room would elevate the experience. Otherwise, it was good!

The rice pudding was terrible. The bread with the hummus was fair. The ravioli was okay. The snacks were great. The two delays were not pleasant. In the beginning I understand, but on arrival we sat for about 30 minutes before getting at the gate.

We appreciated that the flight attendant came through 3 times with drinks or water on the long flight..I was also glad that they were separating out recycling! I would have liked a 12oz sofa can instead of 7oz, but that's a minor quibble. The knee space in economy was also better than most of Alaska's competitors.

No beverages were served on the flight to Vegas as there was turbulence. It was actually one the smoothest flights that I have ever been on. My return flight home I upgraded my seat for $87 and the crew came through the cabin and served every row except mine drinks... I was waiting for them to come back and they never did. I most likely would never fly Alaska again. It was my first time and I've had better service on Frontier... Might as well pay less for my flight and still get to purchase something to drink than pay more and get passed over.

Leg and arm room are horrible. I am not a big person and found it tight.

It was good except there was a loud rattle from the window on aisle 10 DEF,

Had no way to see what gate came in on or what gate connecting flight would take off.

If they loaded the back of the plane first, loading would go faster

I liked the free snacks and drink. I liked the onboard entertainment. I did not like the WiFi cutting out in middle of my movie.

The small ej plane didn’t have any entertainment aside from the stuff on the Alaska website that has to be accessed from your own device. But everything else was just great.

Flight was delayed 8 times. We were sitting at the airport for 14 hours. We got 2 hours of sleep (if that) on what was not meant to be a red-eye.

It was probably one of the worst flights I’ve been on. The restrooms were never cleaned or stocked. The food was very subpar, and i usually enjoy airline food, so I was disappointed. It was just all around a bad experience. The only saving grace was the flight attendants.

After a delay at the gate, C3, at Ohare on Sunday, I left my Blk ski coat on the bench at the gate, lost! Please review my lob claim, thx.

Very bad! They kept delaying my flight and wouldn’t do anything about it

They brought an empty plane to the gate. Then a flight delay was announced for maintenance and waiting on a part. I was then put on a flight to San Francisco instead with a connecting flight to my final destination. Arrived at my final destination 2 hours late.

The only downside was my cell phone charger wouldn’t work in the charging port but everyone else’s would work in them all. My cell phone cable works fine in my hotel room in Frankfurt.

Flight team stood out for perzonal attention, kindness at bright cheery attitudes at 8am. Very helpful.

Ot was overall fine. Left on time and had basic snacks. Weather was finicky but that’s not the airlines fault.

Quick and seamless boarding. No entertainment but fast Starlink wifi for this short trip and the staff was really friendly.

We boarded late. The crew at the airport was dismissive. The seat cushion on the plane was uncomfortable.

AA delayed the flight for 3 hours and 50 minutes, but delayed the last 2 hours, 30 minutes at a time, so if we knew before, could have stayed at home and worked instead of being at the airport wasting time... The plane's crew was excellent, not their fault.

After arriving in Dallas, the aircraft taxied for an unusually long time and was unable to park at the gate, which caused a significant delay and made me miss my connecting flight. I then had to wait in a very long line to be rebooked, and I was told that no hotel or meal accommodations would be provided. What is even more unacceptable is that my luggage was mishandled and has still not been located. My suitcase contains important medications that I urgently need, and I have been unable to access them due to the airline’s mishandling. This situation has caused me considerable stress and inconvenience, and I need this issue to be resolved immediately.

RIC Staff was not enough. Elderly passengers had to wait 30 minutes to deplane, so we could board and still had to walk as no chairs were provided. And, passenger in front of my seat assignment rammed seat against my legs entire flight time. Was mildly bruised and left thigh still sore.

Liked that it was on time. Staff professional and friendly.

Things were delayed a little. But that didn’t affect my plans. It was fine. I was surprised it was so full thanksgiving day. The crew were friendly and professional.

I appreciated that it was on time, safe and professional. I didn’t like that I wasn’t in a place where I had a window at my window seat. It would have been nice to know that in advance. If it was mentioned in the ticketing, I didn’t notice it.

Overall, an average flight; food options were not the best, and there were bugs on the plane.

My flight was delayed about three hours. I got home at 3:30 in the morning very bad experience.

I like that the crew kept us informed but we moved back and forth from gate to gate before the aircraft arrived.

I like how the crew and pilot kept us updated Even though our flight was slightly delayed. We made up time for it in the air. I really did enjoy my seat and amenities and my trip and value overall.

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

Information on your arrival and departure airports