BOS - YSJ

$350 Find Cheap Flights from Boston to Saint John

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Saint John departing on 3/15. 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
$696
Air Canada
Sun 3/29Thu 4/2
BOS - YSJ • 1 stop
Cheapest one-way
$350
Multiple Airlines
Sun 3/15
BOS - YSJ • 2 stops
Top airlines
Air Canada
Cheapest • from $696 (round-trip)
Air Canada
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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We hope you love your trip to Saint John!
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 - Thu, Apr 2
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
$696Air 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
$709Air Canada
Sun, Mar 29 - Thu, Apr 2
Air Canada Logo
7:55 pm - 11:10 am
BOS
-
YSJ
14h 15m
2 stops
Air Canada Logo
11:55 am - 10:38 pm
YSJ
-
BOS
11h 43m
2 stops
$747Air Canada
Sun, Mar 29 - Thu, Apr 2
Air Canada Logo
7:55 pm - 11:10 am
BOS
-
YSJ
14h 15m
2 stops
Air Canada Logo
11:55 am - 10:38 pm
YSJ
-
BOS
11h 43m
2 stops
$748Air Canada
Sat, Mar 14 - Sat, Mar 21
Air Canada Logo
6:15 am - 3:35 pm
BOS
-
YSJ
8h 20m
2 stops
Air Canada Logo
4:15 pm - 9:27 pm
YSJ
-
BOS
6h 12m
1 stop
$776Air Canada
Sat, Mar 14 - Sat, Mar 21
United Airlines Logo
10:15 am - 3:35 pm
BOS
-
YSJ
4h 20m
1 stop
United Airlines Logo
4:15 pm - 7:12 pm
YSJ
-
BOS
3h 57m
1 stop
$782United Airlines
Sat, Mar 14 - Sat, Mar 21
United Airlines Logo
7:05 am - 3:35 pm
BOS
-
YSJ
7h 30m
2 stops
United Airlines Logo
4:15 pm - 7:12 pm
YSJ
-
BOS
3h 57m
1 stop
$791United Airlines
Sat, Mar 14 - Sat, Mar 21
Air Canada Logo
6:15 am - 3:35 pm
BOS
-
YSJ
8h 20m
2 stops
Air Canada Logo
5:40 am - 2:52 pm
YSJ
-
BOS
10h 12m
2 stops
$856Air Canada
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.

Which airlines provide the cheapest flights from Boston to Saint John?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Boston to Saint John were found on Air Canada ($696) and United Airlines ($782).

Find deals

Good to know

Cheapest flight$350
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 $350 for a one-way ticket and $696 for a round-trip.

  • 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 10667 reviews
7.8Crew
6.8Entertainment
7.3Boarding
6.3Food
7.1Comfort
Airline reviews

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.

4.0 OkayLarissa, Jan 2026
FLL - YYZ
Read more Air Canada reviews

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

Our biggest complaint about Air Canada is that if you don’t like your seat during check-in, there’s a fee to move elsewhere. On our flight from YUL to FFL, we were charged to change seats—just regular seats. What’s maddening is that the plane wasn’t even full; there were even a few people sleeping in the middle row sections (entire rows, completely empty), using them as beds. In my opinion, charging passengers for seat changes is a cash grab by Air Canada. They are definitely not the airline they were back in the day. I suppose they need to gouge the consumer now that they pay their attendants while on ground. One out of 10.

Nothing specific. Cabin temperature was too high for some reason.

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

Information on your arrival and departure airports

Boston (BOS)
Saint John (YSJ)