Open interactive map →Cheap flights from Boston to Ontario
Cheap flights from Boston to Ontario, United States currently start at €276. Multiple carriers serve this route at competitive fares. Both direct and connecting flights operate between Boston and Ontario. Browse the month-by-month price calendar below to find when fares are lowest, then click through to book.
For the best prices on this route, aim to book at least 3-4 weeks in advance. Tuesday and Wednesday departures from Boston tend to be cheaper than Friday or Sunday flights. If €276 is above your budget, try adjusting to a shoulder-season month using the calendar above - fares can drop significantly outside peak periods.
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Cheapest month to fly
- October 2026€2761 stopCheapest
Based on tracked fares, October is the cheapest month to fly this route at around €276.
Prices last updated: September 2026
Entry requirements for United States
EU passportESTA required (visa-waiver)
US passportN/A (domestic)
Requirements vary by nationality and change without notice. Check requirements for your nationality →
Alternative routes
Other ways to reach Ontario
Frequently asked questions
How much does a flight from Boston to Ontario cost?
The cheapest fare currently available from Boston to Ontario is €276. Prices on this route vary by season, day of week, and how far in advance you book. The month-by-month price calendar on this page shows exactly when fares are highest and lowest, so you can pick the most cost-effective window before searching for specific dates. Fares are refreshed regularly as our flight partners publish new availability.
Are there direct flights from Boston to Ontario?
SkyHopp tracks both direct and connecting flights from Boston to Ontario. Connecting flights are often priced lower but add travel time due to the layover. Whether a non-stop option exists on specific dates depends on airline schedules - use the "Direct only" filter on the interactive map to see non-stop options, or check the booking site for a full breakdown by stop count.
When is the cheapest time to fly from Boston to Ontario?
Prices on this route typically dip during shoulder-season months, away from school holidays and public holiday windows. Mid-week departures - particularly Tuesday to Thursday - tend to be cheaper than flights on Fridays and Sundays from Boston. The month-by-month price calendar above is the fastest way to identify the cheapest window - look for the months with the lowest fares before committing to travel dates. Booking 3-6 weeks in advance generally offers the best balance of price and seat availability on this route.