Cheapest return flights from Ontario to St. Thomas in May from $661
AirHint found the following cheapest return flights from Ontario (ONT) to St. Thomas (STT) in May 2025 (see full year).
Return flights
| 19 May - 26 May | American Airlines | ||
| 18 May - 25 May | American Airlines | ||
| 19 May - 25 May | American Airlines | ||
| 06 May - 10 May | jetBlue | ||
| 11 May - 18 May | jetBlue |
Also check the deals for one-way flights from Ontario to St. Thomas in May.
The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.
