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Cheap flights from Seattle to San José from C$ 315

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJO
16 Apr — 23 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to San José

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to San José
Explore the most affordable flight options available from Seattle to San José. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 March 2026.

Tue 5/51:25 p.m.
SEA
-
SJO
2 stops21h 45m
Southwest
Thu 14/59:00 a.m.
SJO
-
SEA
2 stops16h 05m
Southwest
Deal found 14/3C$ 638
Tue 28/410:50 p.m.
SEA
-
SJO
2 stops23h 55m
Alaska Airlines
Wed 6/512:55 a.m.
SJO
-
SEA
2 stops32h 55m
Alaska Airlines
Deal found 14/3C$ 689
Mon 13/410:43 p.m.
SEA
-
SJO
1 stop11h 31m
Multiple Airlines
Mon 20/42:20 a.m.
SJO
-
SEA
2 stops32h 07m
Multiple Airlines
Deal found 12/3C$ 700
Mon 27/48:45 p.m.
SEA
-
SJO
2 stops26h 00m
Alaska Airlines
Wed 6/512:55 a.m.
SJO
-
SEA
2 stops32h 55m
Alaska Airlines
Deal found 14/3C$ 702
Tue 14/410:57 a.m.
SEA
-
SJO
1 stop11h 56m
Multiple Airlines
Mon 20/42:20 a.m.
SJO
-
SEA
2 stops32h 07m
Multiple Airlines
Deal found 12/3C$ 715
Mon 27/410:50 p.m.
SEA
-
SJO
2 stops23h 55m
Alaska Airlines
Tue 5/512:55 a.m.
SJO
-
SEA
2 stops32h 55m
Alaska Airlines
Deal found 14/3C$ 716
Mon 17/85:30 a.m.
SEA
-
SJO
2 stops12h 10m
Southwest
Tue 1/99:00 a.m.
SJO
-
SEA
2 stops15h 35m
Southwest
Deal found 16/3C$ 722
Tue 28/410:50 p.m.
SEA
-
SJO
2 stops23h 55m
Alaska Airlines
Tue 5/512:55 a.m.
SJO
-
SEA
1 stop18h 45m
Alaska Airlines
Deal found 14/3C$ 726
Thu 30/47:40 a.m.
SEA
-
SJO
2 stops15h 05m
Alaska Airlines
Wed 6/512:55 a.m.
SJO
-
SEA
2 stops32h 55m
Alaska Airlines
Deal found 14/3C$ 727
Wed 29/711:05 p.m.
SEA
-
SJO
2 stops12h 40m
Southwest
Fri 7/89:00 a.m.
SJO
-
SEA
2 stops16h 20m
Southwest
Deal found 15/3C$ 730
Fri 1/510:50 p.m.
SEA
-
SJO
2 stops23h 55m
Alaska Airlines
Tue 5/512:55 a.m.
SJO
-
SEA
2 stops14h 47m
Alaska Airlines
Deal found 13/3C$ 737

Find flight deals from Seattle to San José

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to San José (SJO). 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 17 March 2026.

Round-trip from

C$ 638

One-way from

C$ 315

Popular in

December

Cheapest in

October

Average price

C$ 971
Southwest
  • Southwest
  • 5/5-14/5
  • 4 total stops
  • 37h 50m total
  • Seattle to San José
Search Deals
8/4
  • 8/4
  • 1 total stop
  • 10h 23m total
  • Seattle to San José
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (C$ 3 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to San José that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 17 March 2026.
Use the filters below to find and compare flights from Seattle to San José that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Fri 1/5

10:50 p.m.-11:45 p.m.

2 stops23h 55m

San José Juan Santamaria Intl

Tue 5/5

12:55 a.m.-3:50 p.m.

1 stop15h 55m

C$ 761

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 19/5

9:02 a.m.-11:33 p.m.

1 stop13h 31m

San José Juan Santamaria Intl

Tue 2/6

12:53 a.m.-12:01 p.m.

1 stop12h 08m

C$ 782
Quickest round-trip

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Fri 14/8

5:30 a.m.-6:40 p.m.

2 stops12h 10m

San José Juan Santamaria Intl

Sun 23/8

12:35 p.m.-11:35 p.m.

1 stop12h 00m

C$ 804

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 14/4

11:25 a.m.-11:53 p.m.

1 stop11h 28m

San José Juan Santamaria Intl

Thu 16/4

1:03 a.m.-4:39 p.m.

2 stops16h 36m

C$ 815

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sat 2/5

8:05 p.m.-11:45 p.m.

2 stops26h 40m

San José Juan Santamaria Intl

Fri 15/5

12:53 a.m.-6:02 a.m.

2 stops30h 09m

C$ 816

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Fri 8/5

11:43 a.m.-11:45 p.m.

1 stop11h 02m

San José Juan Santamaria Intl

Sun 10/5

12:55 a.m.-6:40 p.m.

1 stop18h 45m

C$ 857

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sat 2/5

9:06 p.m.-11:45 p.m.

1 stop25h 39m

San José Juan Santamaria Intl

Tue 5/5

12:55 a.m.-8:50 p.m.

1 stop20h 55m

C$ 857

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Wed 8/4

7:15 a.m.-11:53 p.m.

2 stops15h 38m

San José Juan Santamaria Intl

Thu 16/4

1:03 a.m.-4:39 p.m.

2 stops16h 36m

C$ 895

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Wed 5/8

8:15 p.m.-11:43 p.m.

1 stop26h 28m

San José Juan Santamaria Intl

Fri 14/8

1:03 a.m.-8:33 p.m.

2 stops20h 30m

C$ 916
Cheapest one-way

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Wed 12/8

6:42 a.m.-11:43 p.m.

2 stops16h 01m

C$ 363

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/3

Showing 1-10 of 20 resultsSorted by cheapest first
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Best time to book a flight from Seattle to San José

Have a flexible travel schedule? Discover the best time to fly to San José 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 José

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to San José. Price data was last updated on 13 March 2026.

To ensure you get the cheapest price possible for a flight from Seattle to San José, you should look to book at least 16 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 José?

Currently, May is the cheapest month in which you can book a flight from Seattle to San José (average of C$ 303). Flying from Seattle to San José in July is currently the most expensive (average of C$ 693). 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.

Related info for your journey

Find useful and relevant information for your journey from Seattle to San José. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to San José?

    There are many flights that can get you from Seattle to San José in 26h. Fly via Alaska Airlines to get the fastest option. Airlines will cover a distance of 5480 km.

  • Can I find deals for flights from Seattle to San José that include hotel bookings?

    Yes. In addition to deals on Seattle to San José flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to San José?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to San José.

  • Can I find deals for business class flights from Seattle to San José?

    Yes. Cheapflights offers flight deals from Seattle to San José 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 José?

    Currently, May is the cheapest month in which you can book a flight from Seattle to San José (average of C$ 303). Flying from Seattle to San José in July is currently the most expensive (average of C$ 693). 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.

See more FAQs

Travelling to a place near San José?

Book flights to San José if you plan to visit one of these locations
Manuel Antonio
Alajuela
Jacó
Heredia
Dominical
Monteverde

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seattle to San José

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Liberia flights

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How does Cheapflights help users find flights from Seattle to San José?

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Why should you use Cheapflights to find cheap flight tickets from Seattle to San José?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Seattle to San José for you. Better yet — we are completely free to use.

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

Yes! Cheapflights helps users easily find flights from Seattle to San José with no change fees.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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