BOS - YSJ

$470 Find Cheap Flights from Boston to Saint John - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$470
Typical prices: $691-$976
Multiple Airlines
Mon 10/15Fri 10/19
BOS - YSJ • 1 stop
Top layover airports
Toronto Pearson Intl (YYZ)
Cheapest • Avg $695 (round-trip)
Montreal Pierre Elliott Trudeau Intl (YUL)
Shortest trip • 4h 36m (one-way)
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Cheap Flights from Boston to Saint John (BOS-YSJ)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to Saint John

Thu, Oct 15 - Mon, Oct 19
Multiple Airlines Logo
7:30 pm - 10:00 amBOS  Boston Logan Intl-YSJ Saint John
13h 30m1 stop Toronto Pearson Intl
Multiple Airlines Logo
10:45 am - 3:57 pmYSJ  Saint John-BOS Boston Logan Intl
30h 12m2 stops Toronto Pearson Intl Ottawa
$470Multiple Airlines
Thu, Oct 15 - Mon, Oct 19
Multiple Airlines Logo
6:00 pm - 10:00 amBOS  Boston Logan Intl-YSJ Saint John
15h 00m1 stop Toronto Island
Multiple Airlines Logo
10:45 am - 6:35 pmYSJ  Saint John-BOS Boston Logan Intl
8h 50m1 stop Toronto Pearson Intl
$476Multiple Airlines
Tue, Oct 13 - Mon, Oct 19
Multiple Airlines Logo
10:05 am - 11:15 pmBOS  Boston Logan Intl-YSJ Saint John
12h 10m2 stops Toronto Pearson Intl Montreal St Hubert
Multiple Airlines Logo
10:45 am - 6:35 pmYSJ  Saint John-BOS Boston Logan Intl
8h 50m1 stop Toronto Pearson Intl
$634Multiple Airlines
Thu, Oct 15 - Tue, Oct 20
Multiple Airlines Logo
7:30 pm - 10:00 amBOS  Boston Logan Intl-YSJ Saint John
13h 30m1 stop Toronto Pearson Intl
Multiple Airlines Logo
6:55 am - 6:35 pmYSJ  Saint John-BOS Boston Logan Intl
12h 40m2 stops Montreal St Hubert Toronto Pearson Intl
$640Multiple Airlines
Thu, Oct 15 - Wed, Oct 21
Multiple Airlines Logo
7:30 pm - 10:00 amBOS  Boston Logan Intl-YSJ Saint John
13h 30m1 stop Toronto Pearson Intl
Multiple Airlines Logo
6:55 am - 6:35 pmYSJ  Saint John-BOS Boston Logan Intl
12h 40m2 stops Montreal St Hubert Toronto Pearson Intl
$640Multiple Airlines
Wed, Oct 14 - Mon, Oct 19
Multiple Airlines Logo
9:55 am - 11:15 pmBOS  Boston Logan Intl-YSJ Saint John
12h 20m2 stops Toronto Island Montreal St Hubert
Multiple Airlines Logo
10:45 am - 6:35 pmYSJ  Saint John-BOS Boston Logan Intl
8h 50m1 stop Toronto Pearson Intl
$675Multiple Airlines
Tue, Oct 27 - Tue, Nov 3
Air Canada Logo
3:10 pm - 11:24 pmBOS  Boston Logan Intl-YSJ Saint John
7h 14m1 stop Toronto Pearson Intl
Air Canada Logo
5:15 am - 10:22 amYSJ  Saint John-BOS Boston Logan Intl
6h 07m1 stop Toronto Pearson Intl
$683Air Canada
Fri, Oct 23 - Sun, Oct 25
Air Canada Logo
4:55 pm - 11:51 pmBOS  Boston Logan Intl-YSJ Saint John
5h 56m1 stop Toronto Pearson Intl
Air Canada Logo
5:00 am - 10:22 amYSJ  Saint John-BOS Boston Logan Intl
6h 22m1 stop Toronto Pearson Intl
$687Air Canada
Thu, Oct 15 - Sat, Oct 17
Air Canada Logo
10:40 am - 3:59 pmBOS  Boston Logan Intl-YSJ Saint John
4h 19m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
5:00 am - 9:55 amYSJ  Saint John-BOS Boston Logan Intl
5h 55m1 stop Toronto Pearson Intl
$687Air Canada
Thu, Oct 15 - Sat, Oct 17
Air Canada Logo
3:35 pm - 11:51 pmBOS  Boston Logan Intl-YSJ Saint John
7h 16m2 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl
Air Canada Logo
5:00 am - 9:55 amYSJ  Saint John-BOS Boston Logan Intl
5h 55m1 stop Toronto Pearson Intl
$688Air Canada
Booking Insights

Price, demand and travel trends for Boston to Saint John flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Boston to Saint John with more confidence.

What's the cheapest day of the week to fly from Boston to Saint John?

Thursday is the cheapest day of the week to fly from Boston to Saint John, it is 20% cheaper than the average day. Saturday is the most expensive day with flight prices 62% higher than average. Based on deals found by KAYAK users in the last 12 months.

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When to book flights from Boston to Saint John

Are your dates flexible? Find out the best times to travel from Boston to Saint John based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Boston to Saint John flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airports can I use when flying from Boston to Saint John?

    Flights from Boston to Saint John usually depart from Boston Logan Intl (BOS) and arrive at Saint John (YSJ).

  • What cabin classes can I book on flights from Boston to Saint John?

    Only Economy Class is available on flights from Boston to Saint John.

  • Which airports do connecting flights from Boston to Saint John pass through?

    Connecting flights from Boston to Saint John most commonly pass through:

    • Montreal Pierre Elliott Trudeau Intl (YUL) - 60% of one-stop connections
    • Toronto Pearson Intl (YYZ) - 40% of one-stop connections
    Together, these airports account for 100% of one-stop bookings on this route.

  • Can I save money by using flexible dates for flights from Boston to Saint John?

    Yes. Being flexible with your travel dates can save you up to 51% on the Boston to Saint John route. Thursday is the cheapest departure day at $608 round-trip on average, while Saturday is the most expensive at $1,231, a difference of $623. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How long is a flight from Boston to Saint John?

    There are currently no nonstop flights available from Boston to Saint John. Flights with 1 layover take between 4h 36m and 6h 32m in total, depending on the connection.

  • Do I need a passport to fly from Boston to Saint John?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • Have flight prices from Boston to Saint John changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $470 to $2,910. That means the highest observed fare was about 6x higher than the lowest one.

  • How much time can I save by choosing a different layover airport from Boston to Saint John?

    Flying via Montreal Pierre Elliott Trudeau Intl (YUL) gives the shortest average 1-stop total travel time at 4h 36m, compared with 6h 32m via Toronto Pearson Intl (YYZ).

  • What is the time difference between Boston and Saint John?

    Saint John is 1 hour ahead of Boston (Atlantic Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available at Saint John Airport (YSJ)?

    Saint John Airport (YSJ) hosts 5 major car rental companies, with daily rates starting from around $29 for economy cars. Top options include:
    • Budget
    • Alamo
    • Avis
    • Enterprise Rent-A-Car
    • National

Your guide to booking Boston to Saint John flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Thursday departure instead of Saturday. On this route, Thursday flights average $608 - about $623 less than Saturday (51% savings) based on the last 12 months.

More options for your flight from Boston to Saint John

Complete your trip to Saint John with a hotel stay or car rental

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