BOS - YSJ

$541 Find Cheap Flights from Boston to Saint John

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Saint John departing on 3/29. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Saint John

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Saint John, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Saint John, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$541
Air Canada
Sun 3/29Sun 4/5
BOS - YSJ • 1 stop
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Boston to Saint John (BOS-YSJ)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Saint John that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to Saint John

Sun, Mar 29 - Sun, Apr 5
Air Canada Logo
5:30 am - 11:15 am
BOS
-
YSJ
4h 45m
1 stop
Air Canada Logo
11:55 am - 2:52 pm
YSJ
-
BOS
3h 57m
1 stop
$541Air Canada
Sun, Mar 29 - Thu, Apr 2
Air Canada Logo
5:30 am - 11:15 am
BOS
-
YSJ
4h 45m
1 stop
Air Canada Logo
5:35 am - 12:11 pm
YSJ
-
BOS
7h 36m
1 stop
$546Air Canada
Sun, Mar 29 - Thu, Apr 2
Air Canada Logo
5:30 am - 11:15 am
BOS
-
YSJ
4h 45m
1 stop
Air Canada Logo
11:55 am - 10:38 pm
YSJ
-
BOS
11h 43m
2 stops
$554Air Canada
Sun, Mar 29 - Sun, Apr 5
Air Canada Logo
5:30 am - 11:15 am
BOS
-
YSJ
4h 45m
1 stop
Air Canada Logo
11:55 am - 10:39 pm
YSJ
-
BOS
11h 44m
2 stops
$555Air Canada
Thu, Mar 26 - Thu, Apr 2
Air Canada Logo
6:15 am - 3:35 pm
BOS
-
YSJ
8h 20m
2 stops
Air Canada Logo
11:55 am - 10:38 pm
YSJ
-
BOS
11h 43m
2 stops
$568Air Canada
Sun, Mar 29 - Sun, Apr 5
Air Canada Logo
7:55 pm - 11:10 am
BOS
-
YSJ
14h 15m
2 stops
Air Canada Logo
11:55 am - 10:39 pm
YSJ
-
BOS
11h 44m
2 stops
$593Air Canada
Thu, Mar 26 - Thu, Apr 2
Multiple Airlines Logo
3:30 pm - 3:45 pm
BOS
-
YSJ
23h 15m
3 stops
Multiple Airlines Logo
12:00 pm - 6:10 pm
YSJ
-
BOS
31h 10m
2 stops
$801Multiple Airlines
Thu, Mar 26 - Thu, Apr 2
Multiple Airlines Logo
3:30 pm - 3:45 pm
BOS
-
YSJ
23h 15m
3 stops
Multiple Airlines Logo
12:00 pm - 6:10 pm
YSJ
-
BOS
31h 10m
3 stops
$852Multiple Airlines
Booking Insights

KAYAK's insights & trends for Boston to Saint John flights

Get data-powered insights and trends into flights from Boston to Saint John to help you find the cheapest flights, the best time to fly and much more.

What is the most popular layover airport when flying from Boston to Saint John?

Percentage of 1-stop round-trip flights from Boston to Saint John chosen by KAYAK users via each layover airport in the last 12 months (only includes trips with the same layover airport on both legs).

Montreal (YUL) is the top choice – 80% of KAYAK users who clicked on 1-stop flights from Boston to Saint John picked an itinerary connecting there.

What is the cheapest layover airport when flying from Boston to Saint John?

Average round-trip price for 1-stop flights from Boston to Saint John clicked by KAYAK users in the last 12 months (only includes trips with the same layover airport on both legs).

Flights via Toronto (YYZ) offer the most affordable fares, with an average round-trip price of $537.

Which layover airport offers the shortest total travel time from Boston to Saint John?

Shortest average total travel time for 1-stop one-way flights from Boston to Saint John via different layover airports, based on KAYAK user data from the last 12 months.

Consider flying via Montreal (YUL) for the shortest journey. The average one-way travel time for flights connecting there is 4h 07m.

Which layover airport has the quickest connection when flying from Boston to Saint John?

Average layover duration at different layover airports for 1-stop one-way flights from Boston to Saint John, based on KAYAK user data from the last 12 months.

If you prefer a quick connection, Montreal (YUL) often has the shortest layovers from Boston to Saint John, with an average of 1h 20m.

Good to know

Cheapest flight$541
Flight from Boston to Saint John

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
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Boston to Saint John

  • What is the cheapest flight from Boston to Saint John?

    In the last 3 days, the lowest price for a flight from Boston to Saint John was $541 for a round-trip ticket.

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

    Yes

  • Which aircraft models fly most regularly from Boston to Saint John?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Boston to Saint John?

    Star Alliance is the only airline alliance operating flights between Boston and Saint John.

  • How does KAYAK find such low prices on flights from Boston to Saint John?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to Saint John.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to Saint John?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Saint John from Boston is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boston to Saint John?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Saint John with an airline and back to Boston with another airline. Booking your flights between Boston and YSJ can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to Saint John?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Saint John from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Boston to Saint John

 
See real verified KAYAK customer reviews for airlines flying from Boston to Saint John. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boston to Saint John? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
Air CanadaOverall score based on 10712 reviews
7.8Crew
6.8Entertainment
7.1Comfort
6.3Food
7.3Boarding
Airline reviews

The last 3 hours it was freezing cold in row 56. Multiple people had their winter coats on and were utilizing the blankets provided by the airline. I also did not have easy access to figure out how to book my food allergy and advance for my meals. Most of everything I received was something I couldn't eat. This needs to be made more accessible. Also, I'm 5'10 which is the average height of the American male. I flew from Philadelphia to Toronto and then to Tokyo and the seats were absolutely unbearable. For that long of a flight it is impossible to get comfortable when doing anything. Flights need to have more space and stop prioritizing costs over people.

2.0 MediocreKendall Lynn, Feb 2026
PHL - YYZ
Read more Air Canada reviews

The last 3 hours it was freezing cold in row 56. Multiple people had their winter coats on and were utilizing the blankets provided by the airline. I also did not have easy access to figure out how to book my food allergy and advance for my meals. Most of everything I received was something I couldn't eat. This needs to be made more accessible. Also, I'm 5'10 which is the average height of the American male. I flew from Philadelphia to Toronto and then to Tokyo and the seats were absolutely unbearable. For that long of a flight it is impossible to get comfortable when doing anything. Flights need to have more space and stop prioritizing costs over people.

Was delayed at every point/ connection. Luggages missing for 5days. Had no medications for diabetes and high B/p. when bags where finally delivered on the 30th, the insulin and ozempic were no longer patent, as the ice pack had since dissolved and the authenticity of the med is now questionable, since they must be refrigerated. Please have them refund my bag fees. I should sue them for all the inconveniences caused to me.

The plane was delayed substantially due to a mechanical problem, that being said, the airline was very fair with providing a meal coupon for us. I would rather arrive late on a mechanically sound plane than the alternative. The food served in the plane was just awful, however and I recommend a new catering company.

I waiting for 2 hrs to retrieve my luggage. Didn't get home till 3am.

The flight left late and I didn’t get a glass of bubbly upon boarding (which I’m used to when booking business class on other flights), but otherwise it was a pleasant flight with lovely, helpful crew members and I enjoyed my meal.

Flight cancellations, delays, mass confusion and disorganization! That’s Air Canada for you, nothing new. I would have chosen a different airline if it were an option, and Air Canada continues to prove they don’t care about their customers.

everything was fine. but paying for 1 piece of check-in luggage and denying passengers to board with carry-on luggage which by air line's standards does not fit is not acceptable. when one travels for a longer time one needs to have some essentials

Couldn't fit knees, only 1 toilet working, didn't get anything to drink cause the stewards were not able to get to us

Flight was canceled for a reason they knew hours before but did not mention. Next the gate chnage from 37 to 38 at least 10 times. Ridiculous.

The flight from SFO to YVR was delayed and my bag did not make it to my next flight from YVR to SYD. It took almost 3 days after I landed to get my bag and when I got it, it was filled with dust

Everything you need to know for your flight from Boston to Saint John

Information on your arrival and departure airports