Cheapest return flights from Ontario to St. Thomas in April from $580

AirHint found the following cheapest return flights from Ontario (ONT) to St. Thomas (STT) in April 2026 (see full year).

Return flights

13 Apr - 22 Apr Southwest Airlines
15 Apr - 20 Apr Southwest Airlines
17 Apr - 19 Apr Southwest Airlines

Also check the deals for one-way flights from Ontario to St. Thomas in April.

Powered by

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.

Book a cheap hotel in St. Thomas

Cheap car rent in St. Thomas

Feel free to contact us with any feedback or request another flight research.