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St John

$670+ 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 7/25. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YSJ
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheap 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 junio 12, 2025.

Round-trip from

$670
(Air Canada)
From Seattle/Tacoma Intl to Saint John
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Find flight deals from Seattle to St John

Cheapest flights from Seattle to St John
Explore the most affordable flight options available from Seattle to St John. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 12, 2025.

This Air Canada deal was found by Cheapflights users on 6/9. 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.
vie. 7/2512:05 pmSEA - YSJ
1 stop7h 45mAir Canada
vie. 8/15:55 amYSJ - SEA
1 stop9h 05mAir Canada
Deal found 6/9$670
This United Airlines deal was found by Cheapflights users on 6/9. 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.
vie. 7/255:14 pmSEA - YSJ
2 stops13h 35mUnited Airlines
vie. 8/15:55 amYSJ - SEA
3 stops43h 02mUnited Airlines
Deal found 6/9$1,001

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 junio 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

vie. 7/25

12:05 pm-11:50 pm

1 stop7h 45m

Saint John

vie. 8/1

5:55 am-11:00 am

1 stop9h 05m

$670

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

vie. 7/25

5:14 pm-10:49 am

2 stops13h 35m

Saint John

vie. 8/1

5:55 am-8:57 pm

3 stops43h 02m

$1,001

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

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.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Saint John

Rainfall in St John by month

Plan your trip to St John by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Saint John ranges from 3.2 - 5.3 inches per month. November is typically the wettest month, when rainfall can reach 5.3 in. August is typically the driest time to visit Saint John when rainfall is around 3.2 in.

Temperature in St John by month

Plan your trip to St John by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Saint John, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 17.6 F).

Reviews of airlines servicing St John

Get insights into the airlines that provide service to St John. 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 St John. Reviews last updated junio 12, 2025.
United Airlines
7.4
Good
8,790 reviews

Overall

7.4

Entertainment

7.0

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,790 reviews
United Airlines
7.4
Good
8,790 reviews

Overall

7.4

Entertainment

7.0

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.1
Good
9,531 reviews
United Airlines
7.4
Good
8,790 reviews

Overall

7.4

Entertainment

7.0

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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.

  • 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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