$122 Find Cheap Flights from Ontario to Boston - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Boston departing on 9/3. 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

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Flight Deals

Cheap Flights from Ontario to Boston

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Boston 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 Ontario to Boston

Tue, Sep 29 - Thu, Oct 15
Porter Airlines Logo
3:05 pm - 4:46 pm
YTZ
-
BOS
1h 41mnonstop
Porter Airlines Logo
7:00 am - 8:47 am
BOS
-
YTZ
1h 47mnonstop
$185Porter Airlines
Fri, Aug 28 - Fri, Aug 28
Porter Airlines Logo
1:35 pm - 3:15 pm
YTZ
-
BOS
1h 40mnonstop
Porter Airlines Logo
8:30 pm - 10:17 pm
BOS
-
YTZ
1h 47mnonstop
$185Porter Airlines
Wed, Sep 23 - Wed, Sep 30
Air Transat Logo
4:55 pm - 6:35 pm
YYZ
-
BOS
1h 40mnonstop
Air Transat Logo
7:30 pm - 9:25 pm
BOS
-
YYZ
1h 55mnonstop
$189Air Transat
Fri, Sep 25 - Sun, Sep 27
Air Transat Logo
7:25 am - 9:05 am
YYZ
-
BOS
1h 40mnonstop
Air Transat Logo
10:05 am - 12:00 pm
BOS
-
YYZ
1h 55mnonstop
$189Air Transat
Fri, Aug 21 - Sun, Aug 23
Air Canada Logo
12:25 pm - 2:02 pm
YTZ
-
BOS
1h 37mnonstop
Air Canada Logo
5:45 am - 11:51 am
BOS
-
YTZ
6h 06m
1 stop
$192Air Canada
Fri, Sep 4 - Mon, Sep 7
Air Canada Logo
5:20 pm - 6:57 pm
YTZ
-
BOS
1h 37mnonstop
Air Canada Logo
9:35 am - 11:34 am
BOS
-
YTZ
1h 59mnonstop
$192Air Canada
Tue, Sep 15 - Tue, Sep 22
Multiple Airlines Logo
4:55 pm - 6:35 pm
YYZ
-
BOS
1h 40mnonstop
Multiple Airlines Logo
3:35 pm - 9:53 pm
BOS
-
YYZ
6h 18m
1 stop
$215Multiple Airlines
Wed, Nov 11 - Fri, Nov 20
Multiple Airlines Logo
10:40 am - 6:49 pm
YUL
-
BOS
8h 09m
2 stops
Multiple Airlines Logo
4:35 pm - 10:10 pm
BOS
-
YUL
5h 35m
1 stop
$220Multiple Airlines
Sat, Aug 29 - Sat, Sep 5
United Airlines Logo
7:00 am - 11:34 pm
YYZ
-
BOS
16h 34m
1 stop
United Airlines Logo
6:54 pm - 9:19 am
BOS
-
YYZ
14h 25m
1 stop
$240United Airlines
Thu, Sep 17 - Sun, Sep 20
United Airlines Logo
7:30 am - 2:22 pm
YYZ
-
BOS
6h 52m
1 stop
United Airlines Logo
6:00 am - 11:49 am
BOS
-
YYZ
5h 49m
1 stop
$241United Airlines
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Good to know

Low season

January

Cheapest flight

$122
Best time to beat the crowds but there is an average 6% increase in price.
Most popular time to fly with an average 3% increase in price.
Flight from Toronto Island to Boston

Flights from Ontario to Boston: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Ontario to Boston 
Learn how KAYAK collects reviews and tips from users.
JenFlew with Porter Airlines
YTZ
-
BOS
Jan 2026
Get there SUPER EARLY, lines are long, only a few people working. Be prepared to massively overpay for luggage.
Verified travelerFlew with Air Canada
YYZ
-
BOS
Nov 2024
Don't forget about customs at the Toronto airport--it will take 45+ minutes with the lines unless you have a special status program!

FAQs for booking flights from Ontario to Boston

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

    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 Ontario to Boston.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Boston from Ontario 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 Ontario to Boston?

    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 Boston with an airline and back to Ontario with another airline.

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

    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 Boston from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Hampton Beach
Everett
Warwick
Hampton
Wells
Waltham
Middletown
Plymouth
Concord
Revere
Brookline
South Portland
Gloucester
Woburn
York Beach
Burlington
West Yarmouth
Danvers
Braintree
Somerville

Everything you need to know for your flight to Boston

Information on the airport you'll fly into in Boston

Boston (BOS)