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Cheap flights from Seattle to Saint John from $787

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 9/10. 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
1 adult, Economy, 0 bags

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
5:50 am - 11:51 pmSEA  Seattle/Tacoma Intl-YSJ Saint John
14h 01m2 stops Vancouver Intl Toronto Pearson Intl
Air Canada Logo
4:40 pm - 10:47 pmYSJ  Saint John-SEA Seattle/Tacoma Intl
10h 07m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl
$787Air Canada
Thu, Sep 10 - Wed, Sep 16
Air Canada Logo
8:00 am - 11:51 pmSEA  Seattle/Tacoma Intl-YSJ Saint John
11h 51m1 stop Toronto Pearson Intl
Air Canada Logo
4:40 pm - 10:47 pmYSJ  Saint John-SEA Seattle/Tacoma Intl
10h 07m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl
$806Air Canada
Thu, Sep 10 - Wed, Sep 16
Air Canada Logo
5:50 am - 11:51 pmSEA  Seattle/Tacoma Intl-YSJ Saint John
14h 01m2 stops Vancouver Intl Toronto Pearson Intl
Air Canada Logo
4:40 pm - 10:47 pmYSJ  Saint John-SEA Seattle/Tacoma Intl
10h 07m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl
$819Air Canada
Thu, Sep 10 - Wed, Sep 16
Air Canada Logo
8:00 am - 11:51 pmSEA  Seattle/Tacoma Intl-YSJ Saint John
11h 51m1 stop Toronto Pearson Intl
Air Canada Logo
12:50 pm - 9:04 pmYSJ  Saint John-SEA Seattle/Tacoma Intl
12h 14m1 stop Toronto Pearson Intl
$830Air Canada
Thu, Sep 10 - Wed, Sep 16
Air Canada Logo
8:00 am - 11:51 pmSEA  Seattle/Tacoma Intl-YSJ Saint John
11h 51m1 stop Toronto Pearson Intl
Air Canada Logo
4:40 pm - 10:47 pmYSJ  Saint John-SEA Seattle/Tacoma Intl
10h 07m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl
$838Air Canada
Thu, Sep 10 - Wed, Sep 16
Air Canada Logo
8:00 am - 11:51 pmSEA  Seattle/Tacoma Intl-YSJ Saint John
11h 51m1 stop Toronto Pearson Intl
Air Canada Logo
12:50 pm - 9:04 pmYSJ  Saint John-SEA Seattle/Tacoma Intl
12h 14m1 stop Toronto Pearson Intl
$862Air Canada
Thu, Sep 10 - Wed, Sep 16
Multiple Airlines Logo
7:35 pm - 10:00 amSEA  Seattle/Tacoma Intl-YSJ Saint John
10h 25m2 stops Calgary Toronto Pearson Intl
Multiple Airlines Logo
6:55 am - 9:40 amYSJ  Saint John-SEA Seattle/Tacoma Intl
30h 45m3 stops Montreal St Hubert Toronto Pearson Intl Calgary
$935Multiple Airlines
Thu, Sep 10 - Wed, Sep 16
Air Canada Logo
7:15 pm - 11:56 amSEA  Seattle/Tacoma Intl-YSJ Saint John
12h 41m2 stops Vancouver Intl Toronto Pearson Intl
Air Canada Logo
4:40 pm - 10:42 pmYSJ  Saint John-SEA Seattle/Tacoma Intl
10h 02m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl
$944Air Canada
Tue, Sep 29 - Sat, Oct 3
Air Canada Logo
5:50 am - 11:51 pmSEA  Seattle/Tacoma Intl-YSJ Saint John
14h 01m2 stops Vancouver Intl Toronto Pearson Intl
Air Canada Logo
4:40 pm - 10:47 pmYSJ  Saint John-SEA Seattle/Tacoma Intl
10h 07m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl
$955Air Canada
Mon, Sep 21 - Fri, Sep 25
Air Canada Logo
8:00 am - 11:56 amSEA  Seattle/Tacoma Intl-YSJ Saint John
23h 56m1 stop Toronto Pearson Intl
Air Canada Logo
4:40 pm - 10:42 pmYSJ  Saint John-SEA Seattle/Tacoma Intl
10h 02m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl
$974Air Canada
Tue, Sep 29 - Sat, Oct 3

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Air Canada flights from Seattle to Saint John

Our best Air Canada deals on Seattle to Saint John flight tickets
Air Canada
Sep 10
SEA5:50 amSeattle/Tacoma Intl
14h 01m
2 stops
YSJ11:51 pmSaint John
Sep 16
YSJ4:40 pmSaint John
10h 07m
2 stops
SEA10:47 pmSeattle/Tacoma Intl
$787
Air Canada
Sep 10
SEA8:00 amSeattle/Tacoma Intl
11h 51m
1 stop
YSJ11:51 pmSaint John
Sep 16
YSJ4:40 pmSaint John
10h 07m
2 stops
SEA10:47 pmSeattle/Tacoma Intl
$806
Air Canada
Sep 10
SEA5:50 amSeattle/Tacoma Intl
14h 01m
2 stops
YSJ11:51 pmSaint John
Sep 16
YSJ4:40 pmSaint John
10h 07m
2 stops
SEA10:47 pmSeattle/Tacoma Intl
$819

United Airlines flights from Seattle to Saint John

Our best United Airlines deals on Seattle to Saint John flight tickets
United Airlines
Sep 10
SEA11:00 pmSeattle/Tacoma Intl
12h 59m
2 stops
YSJ3:59 pmSaint John
Sep 16
YSJ5:00 amSaint John
18h 08m
3 stops
SEA7:08 pmSeattle/Tacoma Intl
$1,093
United Airlines
Sep 10
SEA6:32 amSeattle/Tacoma Intl
29h 27m
3 stops
YSJ3:59 pmSaint John
Sep 16
YSJ5:00 amSaint John
18h 08m
3 stops
SEA7:08 pmSeattle/Tacoma Intl
$2,431

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 August 15, 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

Cheapest round-trip

SeattleSaint John

SEA Seattle/Tacoma Intl - YSJ Saint John

SEAYSJ

Seattle/Tacoma Intl

Thu 9/10

5:50 am-11:51 pm

2 stops14h 01m

Saint John

Wed 9/16

4:40 pm-10:47 pm

2 stops10h 07m

$787
Quickest round-trip

SeattleSaint John

SEA Seattle/Tacoma Intl - YSJ Saint John

SEAYSJ

Seattle/Tacoma Intl

Thu 9/10

8:00 am-11:51 pm

1 stop11h 51m

Saint John

Wed 9/16

4:40 pm-10:47 pm

2 stops10h 07m

$806

SeattleSaint John

SEA Seattle/Tacoma Intl - YSJ Saint John

SEAYSJ

Seattle/Tacoma Intl

Thu 9/10

5:50 am-11:51 pm

2 stops14h 01m

Saint John

Wed 9/16

4:40 pm-10:47 pm

2 stops10h 07m

$819

SeattleSaint John

SEA Seattle/Tacoma Intl - YSJ Saint John

SEAYSJ

Seattle/Tacoma Intl

Thu 9/10

8:00 am-11:51 pm

1 stop11h 51m

Saint John

Wed 9/16

12:50 pm-9:04 pm

1 stop12h 14m

$830

SeattleSaint John

SEA Seattle/Tacoma Intl - YSJ Saint John

SEAYSJ

Seattle/Tacoma Intl

Thu 9/10

8:00 am-11:51 pm

1 stop11h 51m

Saint John

Wed 9/16

4:40 pm-10:47 pm

2 stops10h 07m

$838

SeattleSaint John

SEA Seattle/Tacoma Intl - YSJ Saint John

SEAYSJ

Seattle/Tacoma Intl

Thu 9/10

8:00 am-11:51 pm

1 stop11h 51m

Saint John

Wed 9/16

12:50 pm-9:04 pm

1 stop12h 14m

$862

SeattleSaint John

SEA Seattle/Tacoma Intl - YSJ Saint John

SEAYSJ

Seattle/Tacoma Intl

Thu 9/10

7:35 pm-10:00 am

2 stops10h 25m

Saint John

Wed 9/16

6:55 am-9:40 am

3 stops30h 45m

$935

SeattleSaint John

SEA Seattle/Tacoma Intl - YSJ Saint John

SEAYSJ

Seattle/Tacoma Intl

Tue 9/29

7:15 pm-11:56 am

2 stops12h 41m

Saint John

Sat 10/3

4:40 pm-10:42 pm

2 stops10h 02m

$944

SeattleSaint John

SEA Seattle/Tacoma Intl - YSJ Saint John

SEAYSJ

Seattle/Tacoma Intl

Mon 9/21

5:50 am-11:51 pm

2 stops14h 01m

Saint John

Fri 9/25

4:40 pm-10:47 pm

2 stops10h 07m

$955

SeattleSaint John

SEA Seattle/Tacoma Intl - YSJ Saint John

SEAYSJ

Seattle/Tacoma Intl

Tue 9/29

8:00 am-11:56 am

1 stop23h 56m

Saint John

Sat 10/3

4:40 pm-10:42 pm

2 stops10h 02m

$974

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

18h 49m

Direct flights

None
The fastest flight from Seattle to Saint John takes 18h 49m
There are no direct flights from Seattle to Saint John. There are no popular flight routes from Seattle to Saint John.
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Frequently asked questions about flying from Seattle to Saint John

  • 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 18h 49m.

  • 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.

Frequently asked questions about flying from Seattle to Saint John

  • 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
Sussex
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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