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.

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).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Saint John as you normally would.

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.

$337+ Flights from Seattle to Saint John

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1. Tell us where you want to go

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3. Compare prices and book

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Cheap flight deals from Seattle to St John

Round-trip from	$664 (Air Canada)
One-way from	$337 (Air Canada)

From Seattle/Tacoma Intl to Saint John

Search Deals

One-way flight from Seattle/Tacoma Intl to Saint John

Search Deals

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 July 30, 2025.

Fri 9/1212:00 pmSEA - YSJ

1 stop8h 11mAir Canada

Fri 9/195:55 amYSJ - SEA

1 stop9h 04mAir Canada

Deal found 7/29

$664

Wed 8/271:50 pmSEA - YSJ

3 stops21h 55mMultiple Airlines

Wed 9/310:45 amYSJ - SEA

2 stops13h 44mMultiple Airlines

Deal found 7/28

$683

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 July 30, 2025.

Fri 9/1212:00 pmSEA - YSJ

1 stop8h 11mAir Canada

Fri 9/195:55 amYSJ - SEA

1 stop9h 04mAir Canada

Deal found 7/29

$664

Wed 8/271:50 pmSEA - YSJ

3 stops21h 55mMultiple Airlines

Wed 9/310:45 amYSJ - SEA

2 stops13h 44mMultiple Airlines

Deal found 7/28

$683

Last-minute flights from Seattle to St John
Discover last-minute flight deals from Seattle to St John. Data last updated July 30, 2025 and is based on user searches.

Mon 8/41:38 pmSEA - YSJ

3 stops22h 07mMultiple Airlines

Mon 8/1110:45 amYSJ - SEA

2 stops13h 43mMultiple Airlines

Deal found 7/28

$1,096

Mon 8/47:15 pmSEA - YSJ

2 stops11h 34mAir Canada

Mon 8/116:35 pmYSJ - SEA

2 stops18h 46mAir Canada

Deal found 7/28

$1,218

Wed 8/271:50 pmSEA - YSJ

3 stops21h 55mMultiple Airlines

Wed 9/310:45 amYSJ - SEA

2 stops13h 44mMultiple Airlines

Deal found 7/28

$683

Wed 8/2712:05 pmSEA - YSJ

1 stop8h 55mAir Canada

Wed 9/35:55 amYSJ - SEA

1 stop9h 04mAir Canada

Deal found 7/28

$705

One-way flights from Seattle to St John
Search for one-way flight options from Seattle to St John. Find affordable one-way fares based on user searches. Data last updated July 30, 2025.

Fri 10/318:00 pmSEA - YSJ

2 stops17h 14mAir Canada

Deal found 7/28

$337

Fri 10/316:20 amSEA - YSJ

3 stops30h 54mUnited Airlines

Deal found 7/28

$527

Thu 10/3012:20 amSEA - YSJ

2 stops12h 54mMultiple Airlines

Deal found 7/28

$598

Fly from

Fly to

Route

Depart

Return

Price

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Fri 9/12

12:00 pm-12:11 am

1 stop8h 11m

Saint John

Fri 9/19

5:55 am-10:59 am

1 stop9h 04m

$664

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Wed 8/27

1:50 pm-3:45 pm

3 stops21h 55m

Saint John

Wed 9/3

10:45 am-8:29 pm

2 stops13h 44m

$683

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Fri 10/31

8:00 pm-5:14 pm

2 stops17h 14m

$337

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Fri 10/31

6:20 am-5:14 pm

3 stops30h 54m

$527

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Thu 10/30

12:20 am-5:14 pm

2 stops12h 54m

$598

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

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.

Reviews of airlines servicing St John

See what other customers who have flown with United Airlines and Air Canada from Seattle to Saint John have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,896 reviews

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

8,896 reviews

United Airlines

7.4

Good

8,896 reviews

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

9,837 reviews

United Airlines

7.4

Good

8,896 reviews

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

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.

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Seattle to St John

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$337+ Cheap flights from Seattle (SEA) to Saint John (YSJ)

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 10/31. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Seattle to St John with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Seattle to St John

Round-trip from

One-way from

Find flight deals from Seattle to St John

Cheapest flights from Seattle to St JohnExplore 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 July 30, 2025.

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 July 30, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to Saint John that are best for you.

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.

Reviews of airlines servicing St John

See what other customers who have flown with United Airlines and Air Canada from Seattle to Saint John have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to St John

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

100% Free

Book with Flexibility

Travel Smart

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 July 30, 2025.