$90 Cheap Flights to Southwestern Ontario

You can fly to Southwestern Ontario without a stopover from 38 US destinations. To find a nonstop route, select "Direct flights only" when browsing for flights to Southwestern Ontario on Expedia. Then, compare your options and find the best departure from one of these cities:

• New York
• Chicago
• Newark
• Washington
• Orlando

Book well in advance or look for cheap flights to Southwestern Ontario during the off-season, such as January and February. Leaving on a Thursday can also save you an average of 16% compared to a Sunday departure.* The Expedia app makes it even easier to know exactly when to book. Just activate the toggle for "Watch prices" and you'll get notified as soon as fares change.*Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.

Find the departure dates you want and a fare that's easy on your pocket by booking your domestic flight to Southwestern Ontario up to 28 days in advance. Search for tickets two to four months ahead if you're visiting Southwestern Ontario from an international destination.**Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.

Sundays are typically the best day to book a cheap flight to Southwestern Ontario, with savings of about 8% on average compared to Fridays. If you purchase tickets on a Friday, expect to spend more as this is typically the most expensive day.**Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.

Choose a seat with one of these airlines and Southwestern Ontario will be yours to explore:

• Delta Air Lines - 8,795 flights to Southwestern Ontario each month, including 8,206 flights to Detroit Metropolitan Wayne County Airport (DTW) per month.
• Air Canada - 3,056 flights to Southwestern Ontario each month, including 3,056 flights to Pearson Intl. Airport (YYZ) per month.
• American Airlines - 1,590 flights to Southwestern Ontario each month, including 806 flights to Pearson Intl. Airport (YYZ) per month.