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St John

$669+ Cheap flights from Seattle (SEA) to Saint John (YSJ)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YSJ
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Seattle to St John

Best flights from Seattle to St John
Discover carefully curated flight deals from Seattle to St John that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 12, 2025.

This Air Canada deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/198:00 pmSEA - YSJ
2 stops10h 39mAir Canada
Fri 1/2311:30 amYSJ - SEA
2 stops26h 01mAir Canada
Deal found 12/9$669
This United Airlines deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/198:40 amSEA - YSJ
2 stops10h 49mUnited Airlines
Fri 1/2311:30 amYSJ - SEA
3 stops15h 13mUnited Airlines
Deal found 12/9$1,249

Find flight deals from Seattle to St John

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to St John (YSJ). 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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$669
(Air Canada)
Provider with most accurate pricing for Seattle/Tacoma Intl-Saint John flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Saint John flights.
Search Deals
From Seattle/Tacoma Intl to Saint John
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to St John 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 2,558,603 searches. Data last updated December 12, 2025.
Use the filters below to find and compare flights from Seattle to Saint John that are best for you.

Fly from

Seattle

Fly to

St John

Route

Depart

Return

Price

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Mon 1/19

8:00 pm-10:39 am

2 stops10h 39m

Saint John

Fri 1/23

11:30 am-9:31 am

2 stops26h 01m

$669

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Mon 1/19

8:40 am-11:29 pm

2 stops10h 49m

Saint John

Fri 1/23

11:30 am-10:43 pm

3 stops15h 13m

$1,249

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

Compare providers for flights from Seattle to St John

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to St John in December.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Saint John flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Saint John flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Seattle-Saint John flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Saint John flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Saint John flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to St John

Have a flexible travel schedule? Discover the best time to fly to St John 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.

Related info for your journey

Find useful and relevant information for your journey from Seattle to St John. 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 Saint John?

    Air Canada and United Airlines can get you from Seattle to Saint John in just under 10h 39m. Your travel time can differ by up to 10m. The distance from Seattle to Saint John is about 2631 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Seattle to St John that include hotel bookings?

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

  • How can I find direct flights from Seattle to St John?

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

  • Can I find deals for business class flights from Seattle to St John?

    Yes. Cheapflights offers flight deals from Seattle to St John by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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