Cheap flights from Seattle to Saint John from $185

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Saint John departing on 10/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Air Canada Logo
12:00 pm - 11:51 pmSEA-YSJ
7h 51m1 stop
Air Canada Logo
5:55 am - 2:16 pmYSJ-SEA
12h 21m2 stops
$636Air Canada
Find Deal
Mon, Oct 13 - Tue, Oct 14
Air Canada Logo
8:00 pm - 5:14 pmSEA-YSJ
17h 14m2 stops
Air Canada Logo
11:55 am - 7:16 pmYSJ-SEA
11h 21m2 stops
$670Air Canada
Find Deal
Fri, Oct 31 - Sat, Nov 15
Air Canada Logo
8:15 am - 11:29 pmSEA-YSJ
11h 14m1 stop
Air Canada Logo
5:40 am - 10:16 pmYSJ-SEA
20h 36m1 stop
$721Air Canada
Find Deal
Fri, Oct 31 - Sat, Nov 15
Air Canada Logo
7:15 am - 11:51 pmSEA-YSJ
12h 36m2 stops
Air Canada Logo
5:55 am - 2:16 pmYSJ-SEA
12h 21m2 stops
$742Air Canada
Find Deal
Mon, Oct 13 - Tue, Oct 14
Air Canada Logo
12:00 pm - 11:51 pmSEA-YSJ
7h 51m1 stop
Air Canada Logo
6:40 pm - 9:45 pmYSJ-SEA
31h 05m1 stop
$755Air Canada
Find Deal
Mon, Oct 13 - Tue, Oct 14
Multiple Airlines Logo
7:10 am - 11:15 amSEA-YSJ
24h 05m3 stops
Multiple Airlines Logo
11:55 am - 7:16 pmYSJ-SEA
11h 21m2 stops
$1,178Multiple Airlines
Find Deal
Fri, Oct 31 - Sat, Nov 15
United Airlines Logo
5:00 am - 11:51 pmSEA-YSJ
14h 51m2 stops
United Airlines Logo
5:55 am - 9:15 pmYSJ-SEA
19h 20m3 stops
$1,339United Airlines
Find Deal
Mon, Oct 13 - Tue, Oct 14

Air Canada flights from Seattle to Saint John

Our best Air Canada deals on Seattle to Saint John flight tickets
Air Canada
Oct 13
SEA12:00 pmSeattle/Tacoma Intl
7h 51m
1 stop
YSJ11:51 pmSaint John
Oct 14
YSJ5:55 amSaint John
12h 21m
2 stops
SEA2:16 pmSeattle/Tacoma Intl
Air Canada
Oct 31
SEA8:00 pmSeattle/Tacoma Intl
17h 14m
2 stops
YSJ5:14 pmSaint John
Nov 15
YSJ11:55 amSaint John
11h 21m
2 stops
SEA7:16 pmSeattle/Tacoma Intl
Air Canada
Oct 31
SEA8:15 amSeattle/Tacoma Intl
11h 14m
1 stop
YSJ11:29 pmSaint John
Nov 15
YSJ5:40 amSaint John
20h 36m
1 stop
SEA10:16 pmSeattle/Tacoma Intl

United Airlines flights from Seattle to Saint John

Our best United Airlines deals on Seattle to Saint John flight tickets
United Airlines
Oct 13
SEA5:00 amSeattle/Tacoma Intl
14h 51m
2 stops
YSJ11:51 pmSaint John
Oct 14
YSJ5:55 amSaint John
19h 20m
3 stops
SEA9:15 pmSeattle/Tacoma Intl
United Airlines
Sep 19
SEA3:19 pmSeattle/Tacoma Intl
28h 52m
2 stops
YSJ12:11 amSaint John
Sep 26
YSJ5:55 amSaint John
43h 20m
3 stops
SEA9:15 pmSeattle/Tacoma Intl

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 September 17, 2025.
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

Mon 10/13

12:00 pm-11:51 pm

1 stop7h 51m

Saint John

Tue 10/14

5:55 am-2:16 pm

2 stops12h 21m

$636

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Fri 10/31

8:00 pm-5:14 pm

2 stops17h 14m

Saint John

Sat 11/15

11:55 am-7:16 pm

2 stops11h 21m

$670

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Fri 10/31

8:15 am-11:29 pm

1 stop11h 14m

Saint John

Sat 11/15

5:40 am-10:16 pm

1 stop20h 36m

$721

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Mon 10/13

7:15 am-11:51 pm

2 stops12h 36m

Saint John

Tue 10/14

5:55 am-2:16 pm

2 stops12h 21m

$742

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Mon 10/13

12:00 pm-11:51 pm

1 stop7h 51m

Saint John

Tue 10/14

6:40 pm-9:45 pm

1 stop31h 05m

$755

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Fri 10/31

7:10 am-11:15 am

3 stops24h 05m

Saint John

Sat 11/15

11:55 am-7:16 pm

2 stops11h 21m

$1,178

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Mon 10/13

5:00 am-11:51 pm

2 stops14h 51m

Saint John

Tue 10/14

5:55 am-9:15 pm

3 stops19h 20m

$1,339

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Thu 10/2

8:40 am-10:00 am

3 stops21h 20m

$185

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Thu 10/2

8:40 am-10:00 am

2 stops21h 20m

$196

SeattleSaint John

SEA - YSJ

SEAYSJ

Seattle/Tacoma Intl

Thu 10/2

7:16 am-10:00 am

1 stop22h 44m

$299

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

Direct flights

None
There are no direct flights from Seattle to Saint John. There are no popular flight routes 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 7h 51m.

  • 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.

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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1 adult
Fri 10/17
Fri 10/24

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