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Cheap flights from Seattle to San José from C$ 317

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 28/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJO
1 Sep — 8 Sep1
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 2 August 2026.

Thu 1/106:15 a.m.
SEA
-
SJO
2 stops12h 25m
Southwest
Mon 5/109:00 a.m.
SJO
-
SEA
2 stops16h 35m
Southwest
Deal found 1/8C$ 709
Sat 31/105:55 a.m.
SEA
-
SJO
2 stops12h 45m
Southwest
Sun 8/112:10 p.m.
SJO
-
SEA
2 stops21h 55m
Southwest
Deal found 1/8C$ 765
Sun 20/96:45 p.m.
SEA
-
SJO
2 stops17h 00m
Southwest
Sun 27/912:35 p.m.
SJO
-
SEA
1 stop12h 05m
Southwest
Deal found 30/7C$ 800
Sat 31/105:05 a.m.
SEA
-
SJO
2 stops13h 34m
United Airlines
Sun 8/112:25 p.m.
SJO
-
SEA
1 stop10h 26m
United Airlines
Deal found 29/7C$ 810
Tue 1/98:55 a.m.
SEA
-
SJO
1 stop8h 45m
Southwest
Fri 18/99:00 a.m.
SJO
-
SEA
2 stops15h 55m
Southwest
Deal found 31/7C$ 811
Fri 4/911:59 p.m.
SEA
-
SJO
1 stop11h 22m
United Airlines
Tue 22/97:55 a.m.
SJO
-
SEA
2 stops13h 48m
United Airlines
Deal found 29/7C$ 817
Tue 1/96:40 a.m.
SEA
-
SJO
2 stops11h 00m
Southwest
Mon 14/99:00 a.m.
SJO
-
SEA
2 stops12h 50m
Southwest
Deal found 30/7C$ 820
Sat 29/86:49 a.m.
SEA
-
SJO
2 stops15h 26m
Multiple Airlines
Sun 13/94:35 p.m.
SJO
-
SEA
2 stops18h 59m
Multiple Airlines
Deal found 29/7C$ 825
Mon 14/95:30 a.m.
SEA
-
SJO
2 stops12h 15m
Southwest
Fri 18/99:00 a.m.
SJO
-
SEA
2 stops15h 55m
Southwest
Deal found 31/7C$ 836
Sat 29/87:55 a.m.
SEA
-
SJO
1 stop9h 05m
Southwest
Sun 13/99:00 a.m.
SJO
-
SEA
2 stops16h 55m
Southwest
Deal found 29/7C$ 842
Mon 14/95:30 a.m.
SEA
-
SJO
2 stops12h 15m
Southwest
Mon 21/99:00 a.m.
SJO
-
SEA
2 stops15h 55m
Southwest
Deal found 31/7C$ 845
Sat 5/1211:59 p.m.
SEA
-
SJO
1 stop11h 16m
United Airlines
Thu 10/128:45 a.m.
SJO
-
SEA
1 stop12h 27m
United Airlines
Deal found 1/8C$ 846

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 2 August 2026.

Round-trip from

C$ 709

One-way from

C$ 317

Popular in

April

Cheapest in

October

Average price

C$ 939
Southwest
  • Southwest
  • 13/10-22/10
  • 4 total stops
  • 25h 15m total
  • Seattle to San José
Search Deals
Southwest
  • Southwest
  • 28/9
  • 2 total stops
  • 12h 15m total
  • Seattle to San José
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 164 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 2 August 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

Sun 20/9

6:45 p.m.-12:45 p.m.

2 stops17h 00m

San José Juan Santamaria Intl

Sun 27/9

12:35 p.m.-11:40 p.m.

1 stop12h 05m

C$ 800

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 6/10

6:30 a.m.-7:37 p.m.

2 stops12h 07m

San José Juan Santamaria Intl

Mon 19/10

8:45 a.m.-9:01 p.m.

1 stop13h 16m

C$ 810

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 1/9

11:59 p.m.-12:21 p.m.

1 stop11h 22m

San José Juan Santamaria Intl

Fri 18/9

8:45 a.m.-11:26 p.m.

1 stop15h 41m

C$ 810

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 1/11

8:35 p.m.-11:25 a.m.

2 stops12h 50m

San José Juan Santamaria Intl

Sat 14/11

2:25 p.m.-10:51 p.m.

1 stop10h 26m

C$ 810

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 14/9

11:59 p.m.-12:21 p.m.

1 stop11h 22m

San José Juan Santamaria Intl

Mon 21/9

7:55 a.m.-9:51 p.m.

2 stops14h 56m

C$ 817

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sat 29/8

7:55 a.m.-6:00 p.m.

1 stop9h 05m

San José Juan Santamaria Intl

Sun 13/9

9:00 a.m.-12:55 a.m.

2 stops16h 55m

C$ 842

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 14/9

5:30 a.m.-6:45 p.m.

2 stops12h 15m

San José Juan Santamaria Intl

Mon 21/9

9:00 a.m.-11:55 p.m.

2 stops15h 55m

C$ 845

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sat 7/11

11:59 p.m.-11:25 a.m.

1 stop9h 26m

San José Juan Santamaria Intl

Sun 15/11

6:40 a.m.-7:37 p.m.

1 stop14h 57m

C$ 848
Quickest round-trip

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 15/11

11:59 p.m.-11:25 a.m.

1 stop9h 26m

San José Juan Santamaria Intl

Mon 23/11

2:25 p.m.-10:51 p.m.

1 stop10h 26m

C$ 853

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sat 5/12

6:51 p.m.-6:25 a.m.

1 stop9h 34m

San José Juan Santamaria Intl

Fri 11/12

8:45 a.m.-7:12 p.m.

1 stop12h 27m

C$ 925

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/7

Showing 1-10 of 21 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?

To ensure you get the cheapest price possible for a flight from Seattle to San José, you should look to book at least 74 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, October is the cheapest month in which you can book a flight from Seattle to San José (average of C$ 705). Flying from Seattle to San José in April is currently the most expensive (average of C$ 1,103). 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.

How much does it cost to fly round-trip from Seattle to San José?

Airfare is below average for this route at the moment.

Seattle to San José flights typically cost between C$ 810 and C$ 1,084 in October.
The cheapest round-trip price found within the last 5 days was C$ 709 on Southwest (1 Oct-5 Oct).

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 12h 07m. Fly via Southwest or United Airlines to get the fastest option. Airlines will cover a distance of 5480 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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, October is the cheapest month in which you can book a flight from Seattle to San José (average of C$ 705). Flying from Seattle to San José in April is currently the most expensive (average of C$ 1,103). 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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