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Cheap flights from Seattle to San José from C$ 228

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 25/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJO
28 Nov — 5 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 29 October 2025.

Tue 9/127:25 a.m.SEA - SJO
1 stop12h 55mDelta
Thu 18/122:31 p.m.SJO - SEA
1 stop21h 48mDelta
Deal found 27/10C$ 576
Sat 15/115:05 a.m.SEA - SJO
1 stop14h 55mUnited Airlines
Fri 5/122:20 p.m.SJO - SEA
1 stop10h 27mUnited Airlines
Deal found 29/10C$ 577
Tue 9/127:05 a.m.SEA - SJO
1 stop14h 43mAlaska Airlines
Sun 14/121:30 a.m.SJO - SEA
2 stops19h 25mAlaska Airlines
Deal found 27/10C$ 581
Mon 8/125:59 p.m.SEA - SJO
1 stop27h 49mAlaska Airlines
Sun 14/121:30 a.m.SJO - SEA
1 stop21h 05mAlaska Airlines
Deal found 27/10C$ 587
Mon 8/125:00 p.m.SEA - SJO
2 stops28h 48mAlaska Airlines
Wed 17/121:30 a.m.SJO - SEA
1 stop13h 27mAlaska Airlines
Deal found 27/10C$ 599
Sat 6/1212:30 p.m.SEA - SJO
1 stop9h 18mAlaska Airlines
Mon 15/121:30 a.m.SJO - SEA
2 stops17h 06mAlaska Airlines
Deal found 28/10C$ 613
Tue 4/1111:10 p.m.SEA - SJO
2 stops23h 28mAlaska Airlines
Mon 17/111:55 a.m.SJO - SEA
2 stops18h 53mAlaska Airlines
Deal found 26/10C$ 615
Tue 4/117:10 a.m.SEA - SJO
1 stop11h 29mUnited Airlines
Tue 18/112:20 p.m.SJO - SEA
1 stop10h 26mUnited Airlines
Deal found 26/10C$ 619
Thu 13/115:20 a.m.SEA - SJO
2 stops17h 18mAlaska Airlines
Sun 16/111:55 a.m.SJO - SEA
2 stops18h 53mAlaska Airlines
Deal found 27/10C$ 620

Cheap 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 29 October 2025.

Round-trip from

C$ 576

One-way from

C$ 228

Popular in

December

Cheapest in

September

Average price

C$ 715
Delta
  • Delta
  • 9/12-15/12
  • 2 total stops
  • 28h 45m total
  • Seattle to San José
Search Deals
25/1
  • 25/1
  • 3 total stops
  • 44h 35m total
  • Seattle to San José
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 147 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 29 October 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

Tue 9/12

7:25 a.m.-10:20 p.m.

1 stop12h 55m

San José Juan Santamaria Intl

Mon 15/12

7:00 a.m.-8:50 p.m.

1 stop15h 50m

C$ 576

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 9/12

7:25 a.m.-10:20 p.m.

1 stop12h 55m

San José Juan Santamaria Intl

Thu 18/12

2:31 p.m.-10:19 a.m.

1 stop21h 48m

C$ 576

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 9/12

6:00 a.m.-10:20 p.m.

1 stop14h 20m

San José Juan Santamaria Intl

Wed 17/12

7:00 a.m.-5:47 p.m.

1 stop12h 47m

C$ 576

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 9/12

8:25 a.m.-11:48 p.m.

2 stops13h 23m

San José Juan Santamaria Intl

Sun 14/12

1:30 a.m.-6:55 p.m.

2 stops19h 25m

C$ 581

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sat 6/12

12:30 p.m.-11:48 p.m.

1 stop9h 18m

San José Juan Santamaria Intl

Mon 15/12

1:30 a.m.-4:36 p.m.

2 stops17h 06m

C$ 613

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 7/12

6:00 a.m.-10:20 p.m.

1 stop14h 20m

San José Juan Santamaria Intl

Thu 18/12

7:00 a.m.-11:58 p.m.

1 stop18h 58m

C$ 626

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Fri 14/11

5:59 p.m.-6:55 a.m.

1 stop10h 56m

San José Juan Santamaria Intl

Wed 19/11

7:00 a.m.-11:59 p.m.

1 stop18h 59m

C$ 632

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 10/3

8:25 a.m.-10:00 p.m.

2 stops12h 35m

San José Juan Santamaria Intl

Tue 10/3

1:26 a.m.-2:16 p.m.

1 stop13h 50m

C$ 668

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 1/3

8:25 a.m.-11:00 p.m.

2 stops12h 35m

San José Juan Santamaria Intl

Tue 10/3

1:26 a.m.-6:23 p.m.

2 stops17h 57m

C$ 680

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 25/1

1:39 p.m.-12:14 p.m.

3 stops44h 35m

C$ 228

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/10

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 24 October 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$ 265). Flying from Seattle to San José in December is currently the most expensive (average of C$ 743). 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 29 October 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 9h 18m. Fly via Delta or Alaska 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.

  • What are the cheapest airlines to fly from Seattle to San José one-way?

    The cheapest airlines for a one-way flight from Seattle to San José are Southwest (C$ 242), Delta (C$ 267), and United Airlines (C$ 270).

  • 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$ 265). Flying from Seattle to San José in December is currently the most expensive (average of C$ 743). 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

See prices for flight routes from nearby airports that may be better suited for you.
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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.

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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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