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Cheap flights from Seattle to San José from C$ 233

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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJO
11 Jan — 18 Jan1
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 12 December 2025.

Thu 11/125:00 a.m.SEA - SJO
2 stops13h 39mUnited Airlines
Thu 18/122:20 p.m.SJO - SEA
1 stop12h 14mUnited Airlines
Deal found 10/12C$ 619
Wed 31/1211:59 p.m.SEA - SJO
1 stop11h 16mUnited Airlines
Wed 14/12:20 p.m.SJO - SEA
1 stop10h 39mUnited Airlines
Deal found 10/12C$ 625
Fri 12/128:40 a.m.SEA - SJO
1 stop11h 20mUnited Airlines
Fri 19/1212:35 p.m.SJO - SEA
1 stop13h 59mUnited Airlines
Deal found 11/12C$ 626
Sat 13/128:40 a.m.SEA - SJO
1 stop11h 20mUnited Airlines
Fri 19/1212:35 p.m.SJO - SEA
1 stop13h 59mUnited Airlines
Deal found 10/12C$ 651
Fri 12/125:00 a.m.SEA - SJO
1 stop15h 00mUnited Airlines
Wed 17/129:40 a.m.SJO - SEA
1 stop17h 10mUnited Airlines
Deal found 10/12C$ 670
Sat 13/127:29 p.m.SEA - SJO
1 stop11h 03mUnited Airlines
Sat 20/126:40 a.m.SJO - SEA
1 stop19h 17mUnited Airlines
Deal found 11/12C$ 684
Fri 12/1212:45 p.m.SEA - SJO
1 stop16h 15mDelta
Sat 20/128:30 a.m.SJO - SEA
1 stop13h 26mDelta
Deal found 9/12C$ 692
Thu 11/1211:59 p.m.SEA - SJO
1 stop18h 40mUnited Airlines
Mon 15/128:45 a.m.SJO - SEA
2 stops14h 15mUnited Airlines
Deal found 10/12C$ 701

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 12 December 2025.

Round-trip from

C$ 538

One-way from

C$ 233

Popular in

December

Cheapest in

October

Average price

C$ 1,056
United Airlines
  • United Airlines
  • 25/1-31/1
  • 3 total stops
  • 24h 50m total
  • Seattle to San José
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American Airlines
  • American Airlines
  • 7/2
  • 1 total stop
  • 15h 43m total
  • Seattle to San José
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 75 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 12 December 2025.
Use the filters below to find and compare flights from Seattle to San José that are best for you.

Fly from

Seattle

Fly to

San José

Route

Depart

Return

Price

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 25/1

7:30 p.m.-8:32 a.m.

1 stop11h 02m

San José Juan Santamaria Intl

Sat 31/1

6:40 a.m.-6:28 p.m.

2 stops13h 48m

C$ 538

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Wed 7/1

7:30 p.m.-8:32 a.m.

1 stop11h 02m

San José Juan Santamaria Intl

Wed 14/1

8:45 a.m.-10:59 p.m.

1 stop16h 14m

C$ 611

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 11/1

7:30 p.m.-8:32 a.m.

1 stop11h 02m

San José Juan Santamaria Intl

Wed 14/1

2:20 p.m.-10:59 p.m.

1 stop10h 39m

C$ 611

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 6/1

4:05 p.m.-1:00 p.m.

1 stop18h 55m

San José Juan Santamaria Intl

Sat 31/1

7:00 a.m.-10:52 p.m.

1 stop17h 52m

C$ 619

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 6/1

4:05 p.m.-1:00 p.m.

1 stop18h 55m

San José Juan Santamaria Intl

Thu 29/1

7:00 a.m.-11:15 p.m.

1 stop18h 15m

C$ 619

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 20/1

10:48 p.m.-11:59 p.m.

2 stops23h 11m

San José Juan Santamaria Intl

Thu 5/2

1:16 a.m.-6:43 p.m.

2 stops19h 27m

C$ 633

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 12/4

3:25 p.m.-12:10 p.m.

2 stops19h 45m

San José Juan Santamaria Intl

Wed 22/4

9:00 a.m.-12:10 a.m.

2 stops16h 10m

C$ 654

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 11/1

7:30 p.m.-8:32 a.m.

1 stop11h 02m

San José Juan Santamaria Intl

Sat 31/1

6:40 a.m.-11:47 p.m.

1 stop19h 07m

C$ 670

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 12/4

7:02 p.m.-12:21 p.m.

2 stops16h 19m

San José Juan Santamaria Intl

Wed 22/4

8:45 a.m.-6:33 p.m.

1 stop10h 48m

C$ 676

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Fri 23/1

7:35 a.m.-11:43 p.m.

1 stop14h 08m

C$ 234

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

Showing 1-10 of 19 results
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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 5 December 2025.

To ensure you get the cheapest price possible for a flight from Seattle to San José, you should look to book at least 34 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$ 259). Flying from Seattle to San José in July is currently the most expensive (average of C$ 692). 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.

What is the cheapest time of day to fly from SEA to SJO?

Find hourly flight availability from Seattle to San José. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 December 2025.

When flying from Seattle to San José, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 33% versus a flight at noon.

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 11h 02m. Fly via United 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$ 259). Flying from Seattle to San José in July is currently the most expensive (average of C$ 692). 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
Alajuela
Jacó
Heredia
Dominical
Manuel Antonio
Monteverde

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seattle to San José

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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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