AirHint found the following cheapest return flights from Ontario (ONT) to Athens (ATH) in January 2026 (see full year).

Return flights

18 Jan - 31 Jan	Delta
09 Jan - 12 Jan	Delta
23 Jan - 08 Feb	British Airways
31 Jan - 11 Feb	British Airways
14 Jan - 21 Jan	British Airways
24 Jan - 09 Feb	British Airways
24 Jan - 08 Feb	British Airways
11 Jan - 16 Jan	British Airways
06 Jan - 16 Jan	British Airways
10 Jan - 21 Jan	British Airways
17 Jan - 23 Jan	British Airways
12 Jan - 18 Jan	British Airways
15 Jan - 18 Jan	British Airways

Also check the deals for one-way flights from Ontario to Athens in January.

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.

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Cheapest return flights from Ontario to Athens in January from 521€

Return flights