$134 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 6/29. 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

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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

Sat, Jul 4 - Mon, Jul 6
Porter Airlines Logo
3:05 pm - 4:44 pm
YTZ
-
BOS
1h 39mnonstop
Porter Airlines Logo
4:45 pm - 10:18 pm
BOS
-
YTZ
5h 33m
1 stop
$211Porter Airlines
Thu, Jul 9 - Sun, Jul 12
Air Canada Logo
4:35 pm - 6:22 pm
YYZ
-
BOS
1h 47mnonstop
Air Canada Logo
6:00 am - 7:55 am
BOS
-
YYZ
1h 55mnonstop
$211Air Canada
Fri, Jun 26 - Mon, Jun 29
Air Canada Logo
8:30 am - 2:41 pm
YTZ
-
BOS
6h 11m
1 stop
Air Canada Logo
5:45 am - 11:51 am
BOS
-
YTZ
6h 06m
1 stop
$212Air Canada
Thu, Jul 9 - Sun, Jul 12
Air Canada Logo
4:35 pm - 6:22 pm
YYZ
-
BOS
1h 47mnonstop
Air Canada Logo
5:45 am - 10:35 am
BOS
-
YYZ
4h 50m
1 stop
$212Air Canada
Wed, Aug 26 - Thu, Aug 27
Porter Airlines Logo
6:00 pm - 7:41 pm
YTZ
-
BOS
1h 41mnonstop
Porter Airlines Logo
8:25 pm - 10:12 pm
BOS
-
YTZ
1h 47mnonstop
$213Porter Airlines
Thu, Aug 27 - Sat, Aug 29
Porter Airlines Logo
7:25 am - 9:05 am
YYZ
-
BOS
1h 40mnonstop
Porter Airlines Logo
8:10 pm - 10:05 pm
BOS
-
YYZ
1h 55mnonstop
$213Porter Airlines
Wed, Jul 15 - Sun, Jul 19
Porter Airlines Logo
11:55 am - 4:00 pm
YTZ
-
BOS
4h 05m
1 stop
Porter Airlines Logo
4:45 pm - 10:18 pm
BOS
-
YTZ
5h 33m
1 stop
$214Porter Airlines
Tue, Jun 30 - Tue, Jul 7
Porter Airlines Logo
7:25 am - 9:05 am
YYZ
-
BOS
1h 40mnonstop
Porter Airlines Logo
10:05 am - 12:00 pm
BOS
-
YYZ
1h 55mnonstop
$214Porter Airlines
Thu, Jul 9 - Thu, Jul 16
Air Transat Logo
4:00 pm - 8:55 pm
YYZ
-
BOS
4h 55m
1 stop
Air Transat Logo
10:05 am - 12:00 pm
BOS
-
YYZ
1h 55mnonstop
$218Air Transat
Sun, Jul 12 - Tue, Jul 14
WestJet Logo
7:50 pm - 10:20 pm
YQT
-
BOS
26h 30m
1 stop
WestJet Logo
7:25 am - 7:00 pm
BOS
-
YQT
11h 35m
1 stop
$449WestJet
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$134
Best time to beat the crowds but there is an average 7% increase in price.
Most popular time to fly and prices are also 1% lower on average.
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
Hampton
Warwick
Waltham
Wells
Everett
Middletown
Plymouth
Gloucester
Concord
Woburn
Brookline
Revere
York Beach
Burlington
South Portland
Braintree
West Yarmouth
Danvers
Somerville

Everything you need to know for your flight to Boston

Information on the airport you'll fly into in Boston

Boston (BOS)