$136 Cheap United flights Boston (BOS) to Toronto (YYZ)

Apply the “Price (lowest to highest)” filter on Expedia to find cheap United Airlines return flights from $259 from BOS to YYZ. Affordable one-way fares from $136 are available as well.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Search for one-way or return flights to Toronto in January or February. You could find cheaper fares with United Airlines during these off-peak times.

Look for United Airlines flights from BOS to YYZ about one month before you want to leave. The cheapest time to book an international flight is generally 18 to 29 days ahead of your travel date when you can save 17% versus booking four to five months in advance. Regardless of itinerary or ticket type, the best day of the week to book international airfare is usually Sunday. Friday is often the most expensive. Travelers who book on a Sunday can save an average of 17% compared to those who book on a Friday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

To figure out if there’s a direct journey from BOS to YYZ with United Airlines or other airlines, check the “Nonstop” filter when browsing for tickets.

Find United Airlines’s earliest flights from BOS to YYZ by checking the “Morning” and “Early Morning” filters. Not only will you get to your destination sooner, early departures are also 20% less likely to be canceled.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

United Airlines flights from Logan Intl. Airport (BOS) to Toronto come in to Pearson Intl. Airport (YYZ). This is the main gateway here.

Offering a rewarding loyalty program, United Airlines is a favorite of many passengers heading from BOS to YYZ. Plus, as a United Mileage Plus and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

United Airlines typically operates Embraer 175 planes for journeys from Logan Intl. Airport (BOS) to Pearson Intl. Airport (YYZ). Remember that aircraft type can differ depending on operational needs, so the plane you board might be different on your day of travel.

It’s usually possible to cancel or modify your flight, although there may be additional charges if you made your booking over 24 hours ago. Need to keep your options open? Make use of Expedia’s “Changes included” and “No cancel fee” filters to find flights that won’t charge extra if you need to adjust your plans. To update your booking, visit “Trips,” select your flight and click on “Manage Booking” for more information.