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Cheap flights from Seattle to San José from C$ 320

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 22/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJO
7 Apr — 14 Apr1
1 adult

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 2 April 2025.

Round-trip from

C$ 602

One-way from

C$ 320

Popular in

December

Cheapest in

May

Average price

C$ 948
Alaska Airlines
  • Alaska Airlines
  • 12/5-19/5
  • 2 total stops
  • 25h 39m total
  • Seattle to San José
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 22/5
  • 1 total stop
  • 25h 31m total
  • Seattle to San José
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 115 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 50 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
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Find flight deals from Seattle to San José

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 April 2025.

Mon 12/58:00 a.m.SEA - SJO
1 stop14h 52mAlaska Airlines
Wed 14/51:06 a.m.SJO - SEA
1 stop14h 44mAlaska Airlines
Deal found 1/4C$ 602
Wed 3/99:20 p.m.SEA - SJO
1 stop13h 28mDelta
Mon 8/91:18 p.m.SJO - SEA
1 stop11h 53mDelta
Deal found 2/4C$ 683
Sun 27/412:59 a.m.SEA - SJO
2 stops16h 25mAmerican Airlines
Wed 14/511:59 p.m.SJO - SEA
2 stops24h 10mAmerican Airlines
Deal found 1/4C$ 688
Fri 2/56:52 p.m.SEA - SJO
2 stops15h 26mMultiple Airlines
Wed 14/58:50 a.m.SJO - SEA
1 stop14h 09mMultiple Airlines
Deal found 1/4C$ 689
Tue 15/412:54 p.m.SEA - SJO
2 stops20h 17mUnited Airlines
Sun 7/98:37 a.m.SJO - SEA
1 stop11h 12mUnited Airlines
Deal found 1/4C$ 698
Mon 21/77:50 p.m.SEA - SJO
2 stops15h 55mSouthwest
Wed 30/78:45 a.m.SJO - SEA
2 stops16h 20mSouthwest
Deal found 1/4C$ 885

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 April 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

Mon 12/5

8:00 a.m.-11:52 p.m.

1 stop14h 52m

San José Juan Santamaria Intl

Wed 14/5

1:06 a.m.-2:50 p.m.

1 stop14h 44m

C$ 602

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Wed 3/9

9:20 p.m.-11:48 a.m.

1 stop13h 28m

San José Juan Santamaria Intl

Mon 8/9

1:18 p.m.-12:11 a.m.

1 stop11h 53m

C$ 683

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Sun 27/4

12:59 a.m.-6:24 p.m.

2 stops16h 25m

San José Juan Santamaria Intl

Wed 14/5

11:59 p.m.-6:22 p.m.

1 stop19h 23m

C$ 688

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Fri 2/5

6:52 p.m.-11:18 a.m.

2 stops15h 26m

San José Juan Santamaria Intl

Thu 15/5

8:50 a.m.-10:00 p.m.

1 stop14h 10m

C$ 689

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Tue 15/4

12:54 p.m.-10:11 a.m.

2 stops20h 17m

San José Juan Santamaria Intl

Sun 7/9

8:37 a.m.-6:49 p.m.

1 stop11h 12m

C$ 698

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 21/7

7:50 p.m.-12:45 p.m.

2 stops15h 55m

San José Juan Santamaria Intl

Wed 30/7

8:45 a.m.-12:05 a.m.

2 stops16h 20m

C$ 885

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Thu 22/5

9:15 p.m.-11:46 p.m.

1 stop25h 31m

C$ 320

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 23/6

11:40 p.m.-12:00 p.m.

1 stop11h 20m

C$ 369

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 30/6

2:50 p.m.-7:15 a.m.

1 stop15h 25m

C$ 398

SeattleSan José

SEA - SJO

SEASJO

Seattle/Tacoma Intl

Mon 4/8

7:10 p.m.-7:35 a.m.

3 stops59h 25m

C$ 8,004

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/4

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, San José Province?

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 28 March 2025.

To ensure you get the cheapest price possible for a flight from Seattle to San José, San José Province, you should look to book at least 36 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, San José Province?

Currently, September is the cheapest month in which you can book a flight from Seattle to San José, San José Province (average of C$ 486). Flying from Seattle to San José, San José Province in December is currently the most expensive (average of C$ 683). 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 2 April 2025.

When flying from Seattle to San José, San José Province, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 17% versus a flight in the morning.

Rainfall in San José by month

Plan your trip to San José by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San José, San José Province ranges from 0.0 - 300.0 mm per month. September is typically the wettest month, when rainfall can reach 300.0 mm. February is typically the driest time to visit San José, San José Province when rainfall is around 0.0 mm.

Temperature in San José by month

Plan your trip to San José by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San José, San José Province, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 18.0 C).

Reviews of airlines servicing San José

Get insights into the airlines that provide service to San José. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San José. Reviews last updated 2 April 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Seattle to San José to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,820 reviews
Check prices

Entertainment

7.1

Comfort

7.9

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Alaska Airlines
8.0
Very good
9,820 reviews
Alaska Airlines
8.0
Very good
9,820 reviews
Check prices

Entertainment

7.1

Comfort

7.9

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Southwest
8.0
Very good
4,272 reviews
Alaska Airlines
8.0
Very good
9,820 reviews
Check prices

Entertainment

7.1

Comfort

7.9

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Delta
8.0
Very good
7,898 reviews
Alaska Airlines
8.0
Very good
9,820 reviews
Check prices

Entertainment

7.1

Comfort

7.9

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
United Airlines
7.4
Good
8,615 reviews
Alaska Airlines
8.0
Very good
9,820 reviews
Check prices

Entertainment

7.1

Comfort

7.9

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,820 reviews
Check prices

Entertainment

7.1

Comfort

7.9

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

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.

  • What are the cheapest airlines flying from Seattle to San José, San José Province round-trip?

    Currently priced at C$ 602, Alaska Airlines will fly you from Seattle to San José, San José Province and back. In addition to Alaska Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and American Airlines - these airlines can fly you to your destination from C$ 683 and C$ 688, respectively. Alaska Airlines is priced at 38% lower than the current average price of a flight leaving 3 months from now.

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

    The cheapest airline one-way is Alaska Airlines, with whom users have recently found tickets for as low as C$ 320. However, be on the lookout for offers from Delta and United Airlines, as they are both options that can get you from Seattle to San José, San José Province for a low price.

  • 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, San José Province?

    Currently, September is the cheapest month in which you can book a flight from Seattle to San José, San José Province (average of C$ 486). Flying from Seattle to San José, San José Province in December is currently the most expensive (average of C$ 683). 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
Jacó
Alajuela
Dominical
Monteverde

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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

Top 2 airlines flying from Seattle to San José

Discover the top 2 airlines that operate flights from Seattle to San José. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 2 April 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 595AverageC$ 713FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Alaska AirlinesCheapestC$ 698AverageC$ 982FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

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