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Cheap flights from Boston to Saint John from C$ 289

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 27/9. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — YSJ
24 Aug — 31 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Boston to St John

Enter your travel dates to find the best prices.

Cheapest flights from Boston to St John
Explore the most affordable flight options available from Boston to St John. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 July 2026.

Tue 8/93:35 p.m.
BOS
-
YSJ
2 stops17h 25m
Multiple Airlines
Tue 15/95:00 a.m.
YSJ
-
BOS
1 stop14h 04m
Multiple Airlines
Deal found 24/7C$ 637
Thu 13/87:40 p.m.
BOS
-
YSJ
1 stop13h 20m
Multiple Airlines
Thu 20/85:00 a.m.
YSJ
-
BOS
2 stops17h 27m
Multiple Airlines
Deal found 21/7C$ 703
Tue 18/83:55 p.m.
BOS
-
YSJ
2 stops17h 05m
Multiple Airlines
Wed 26/810:45 a.m.
YSJ
-
BOS
1 stop9h 05m
Multiple Airlines
Deal found 20/7C$ 755
Fri 4/97:10 a.m.
BOS
-
YSJ
2 stops15h 05m
Multiple Airlines
Fri 11/910:45 a.m.
YSJ
-
BOS
1 stop8h 50m
Multiple Airlines
Deal found 21/7C$ 892
Mon 7/97:00 a.m.
BOS
-
YSJ
2 stops15h 15m
Multiple Airlines
Mon 14/910:45 a.m.
YSJ
-
BOS
1 stop8h 50m
Multiple Airlines
Deal found 23/7C$ 907
Sun 30/810:40 a.m.
BOS
-
YSJ
1 stop4h 20m
Air Canada
Wed 2/912:50 p.m.
YSJ
-
BOS
1 stop6h 32m
Air Canada
Deal found 23/7C$ 911
Mon 7/94:55 p.m.
BOS
-
YSJ
1 stop7h 30m
Air Canada
Mon 14/912:50 p.m.
YSJ
-
BOS
1 stop6h 14m
Air Canada
Deal found 23/7C$ 921

Find flight deals from Boston to St John

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) 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 25 July 2026.

Round-trip from

C$ 637

One-way from

C$ 289
Air Canada
  • Air Canada
  • 8/9-15/9
  • 3 total stops
  • 31h 29m total
  • Boston to Saint John
Search Deals
27/9
  • 27/9
  • 1 total stop
  • 26h 00m total
  • Boston to Saint John
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston 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 629,999 searches. Data last updated 25 July 2026.
Use the filters below to find and compare flights from Boston to Saint John that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonSaint John

BOS - YSJ

BOSYSJ

Boston Logan Intl

Tue 8/9

3:35 p.m.-10:00 a.m.

2 stops17h 25m

Saint John

Tue 15/9

5:00 a.m.-6:04 p.m.

1 stop14h 04m

C$ 637

BostonSaint John

BOS - YSJ

BOSYSJ

Boston Logan Intl

Thu 13/8

7:40 p.m.-10:00 a.m.

1 stop13h 20m

Saint John

Thu 20/8

5:00 a.m.-9:27 p.m.

2 stops17h 27m

C$ 703

BostonSaint John

BOS - YSJ

BOSYSJ

Boston Logan Intl

Tue 18/8

7:45 p.m.-10:00 a.m.

1 stop13h 15m

Saint John

Wed 26/8

10:45 a.m.-6:50 p.m.

1 stop9h 05m

C$ 721

BostonSaint John

BOS - YSJ

BOSYSJ

Boston Logan Intl

Mon 7/9

4:55 p.m.-1:25 a.m.

1 stop7h 30m

Saint John

Mon 14/9

12:50 p.m.-6:04 p.m.

1 stop6h 14m

C$ 921

BostonSaint John

BOS - YSJ

BOSYSJ

Boston Logan Intl

Sat 5/9

4:55 p.m.-1:25 a.m.

1 stop7h 30m

Saint John

Sat 12/9

5:00 a.m.-9:55 a.m.

1 stop5h 55m

C$ 931
Quickest round-trip

BostonSaint John

BOS - YSJ

BOSYSJ

Boston Logan Intl

Sun 30/8

10:40 a.m.-4:00 p.m.

1 stop4h 20m

Saint John

Wed 2/9

12:50 p.m.-6:22 p.m.

1 stop6h 32m

C$ 944
Cheapest one-way

BostonSaint John

BOS - YSJ

BOSYSJ

Boston Logan Intl

Tue 11/8

8:30 p.m.-10:00 a.m.

1 stop12h 30m

C$ 308

BostonSaint John

BOS - YSJ

BOSYSJ

Boston Logan Intl

Sun 9/8

7:10 a.m.-10:00 a.m.

1 stop25h 50m

C$ 321

BostonSaint John

BOS - YSJ

BOSYSJ

Boston Logan Intl

Mon 10/8

4:55 p.m.-12:55 a.m.

1 stop7h 00m

C$ 438

BostonSaint John

BOS - YSJ

BOSYSJ

Boston Logan Intl

Sun 27/9

5:55 a.m.-10:00 a.m.

3 stops27h 05m

C$ 621

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/7

Showing 1-10 of 12 resultsSorted by cheapest first
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Best time to book a flight from Boston to St John

Have a flexible travel schedule? Discover the best time to fly to St John from Boston 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.

Related info for your journey

Find useful and relevant information for your journey from Boston 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 Boston to St John that include hotel bookings?

    Yes. In addition to deals on Boston to St John flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to St John?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to St John.

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

    Yes. Cheapflights offers flight deals from Boston 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

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Alternative routes for Boston to St John

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Boston to Moncton flights

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