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Cheap flights from Seattle to Saint John from $818

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Saint John departing on 2/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Seattle to Saint John

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
8:10 am - 11:29 pm
SEA
-
YSJ
11h 19m1 stop
Air Canada Logo
2:15 pm - 10:16 pm
YSJ
-
SEA
36h 01m2 stops
$818Air Canada
Sat, Feb 21 - Sat, Feb 28
Air Canada Logo
8:10 am - 3:40 pm
SEA
-
YSJ
27h 30m2 stops
Air Canada Logo
2:15 pm - 10:16 pm
YSJ
-
SEA
36h 01m2 stops
$906Air Canada
Sat, Feb 21 - Sat, Feb 28
United Airlines Logo
7:00 am - 3:40 pm
SEA
-
YSJ
28h 40m2 stops
United Airlines Logo
2:15 pm - 7:03 pm
YSJ
-
SEA
32h 48m2 stops
$965United Airlines
Sat, Feb 21 - Sat, Feb 28
United Airlines Logo
12:32 pm - 3:40 pm
SEA
-
YSJ
23h 08m3 stops
United Airlines Logo
2:15 pm - 7:03 pm
YSJ
-
SEA
32h 48m2 stops
$970United Airlines
Sat, Feb 21 - Sat, Feb 28
Air Canada Logo
8:10 am - 11:29 pm
SEA
-
YSJ
11h 19m1 stop
Air Canada Logo
11:30 am - 10:16 pm
YSJ
-
SEA
14h 46m1 stop
$995Air Canada
Sat, Feb 21 - Sat, Feb 28
United Airlines Logo
11:59 pm - 11:29 pm
SEA
-
YSJ
19h 30m2 stops
United Airlines Logo
11:30 am - 10:16 pm
YSJ
-
SEA
14h 46m1 stop
$1,082United Airlines
Sat, Feb 21 - Sat, Feb 28
United Airlines Logo
8:10 am - 11:29 pm
SEA
-
YSJ
11h 19m1 stop
United Airlines Logo
11:30 am - 10:16 pm
YSJ
-
SEA
14h 46m1 stop
$1,281United Airlines
Sat, Feb 21 - Sat, Feb 28

Air Canada flights from Seattle to Saint John

Our best Air Canada deals on Seattle to Saint John flight tickets
Air Canada
Feb 21
SEA8:10 amSeattle/Tacoma Intl
11h 19m
1 stop
YSJ11:29 pmSaint John
Feb 28
YSJ2:15 pmSaint John
36h 01m
2 stops
SEA10:16 pmSeattle/Tacoma Intl
$818
Air Canada
Feb 21
SEA8:10 amSeattle/Tacoma Intl
27h 30m
2 stops
YSJ3:40 pmSaint John
Feb 28
YSJ2:15 pmSaint John
36h 01m
2 stops
SEA10:16 pmSeattle/Tacoma Intl
$906
Air Canada
Feb 21
SEA8:10 amSeattle/Tacoma Intl
11h 19m
1 stop
YSJ11:29 pmSaint John
Feb 28
YSJ11:30 amSaint John
14h 46m
1 stop
SEA10:16 pmSeattle/Tacoma Intl
$995

United Airlines flights from Seattle to Saint John

Our best United Airlines deals on Seattle to Saint John flight tickets
United Airlines
Feb 21
SEA7:00 amSeattle/Tacoma Intl
28h 40m
2 stops
YSJ3:40 pmSaint John
Feb 28
YSJ2:15 pmSaint John
32h 48m
2 stops
SEA7:03 pmSeattle/Tacoma Intl
$965
United Airlines
Feb 21
SEA12:32 pmSeattle/Tacoma Intl
23h 08m
3 stops
YSJ3:40 pmSaint John
Feb 28
YSJ2:15 pmSaint John
32h 48m
2 stops
SEA7:03 pmSeattle/Tacoma Intl
$970
United Airlines
Feb 21
SEA11:59 pmSeattle/Tacoma Intl
19h 30m
2 stops
YSJ11:29 pmSaint John
Feb 28
YSJ11:30 amSaint John
14h 46m
1 stop
SEA10:16 pmSeattle/Tacoma Intl
$1,082

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Saint 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, momondo users made 832,500 searches. Data last updated January 8, 2026.
Use the filters below to find and compare flights from Seattle to Saint John that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Sat 2/21

8:10 am-11:29 pm

1 stop11h 19m

Saint John

Sat 2/28

2:15 pm-10:16 pm

2 stops36h 01m

$818

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Sat 2/21

8:10 am-3:40 pm

2 stops27h 30m

Saint John

Sat 2/28

2:15 pm-10:16 pm

2 stops36h 01m

$906

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Sat 2/21

7:00 am-3:40 pm

2 stops28h 40m

Saint John

Sat 2/28

2:15 pm-7:03 pm

2 stops32h 48m

$965

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Sat 2/21

12:32 pm-3:40 pm

3 stops23h 08m

Saint John

Sat 2/28

2:15 pm-7:03 pm

2 stops32h 48m

$970

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Sat 2/21

8:10 am-11:29 pm

1 stop11h 19m

Saint John

Sat 2/28

11:30 am-10:16 pm

1 stop14h 46m

$995

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Sat 2/21

11:59 pm-11:29 pm

2 stops19h 30m

Saint John

Sat 2/28

11:30 am-10:16 pm

1 stop14h 46m

$1,082

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Sat 2/21

8:10 am-11:29 pm

1 stop11h 19m

Saint John

Sat 2/28

11:30 am-10:16 pm

1 stop14h 46m

$1,281

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from Seattle to Saint John

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Saint John according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Saint John (SEA to YSJ) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Saint John

Fastest flight time

19h 30m

Direct flights

None
The fastest flight from Seattle to Saint John takes 19h 30m
There are no direct flights from Seattle to Saint John. There are no popular flight routes from Seattle to Saint John.
Search flight deals

  • How far is Seattle/Tacoma Intl to Saint John by plane?

    Saint John is 2622.7 mi away from Seattle/Tacoma Intl. In terms of flight time, this usually takes a little over 19h 30m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Saint John Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Saint John Airport are updated daily.

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Saint John Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Saint John Airport.

  • What documentation or ID do you need to fly to Saint John Airport?

    The travel and health documents you'll need for your trip to Saint John Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Saint John Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • How do I get Price Alerts for flights from Seattle to Saint John?

    Price Alerts will notify you by email when the price for flights to Saint John from Seattle decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from Seattle to Saint John with momondo?

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Traveling to a place near Saint John?

Book flights to Saint John if you plan to visit one of these locations
Bridgetown
Middleton

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Saint John?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Saint John from Seattle.

Can I find flights from Seattle to Saint John with flexible booking policies on momondo?

Flights from Seattle to Saint John with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Seattle to Saint John?

momondo provides multiple filters to help you find the best flight to Saint John from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Seattle to Saint John right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Saint John from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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