AirHint found the following cheapest return flights from Ontario (ONT) to Athens (ATH) in November 2025 (see full year).

Return flights

22 Nov - 12 Dec	British Airways
28 Nov - 05 Dec	British Airways
25 Nov - 01 Dec	British Airways
26 Nov - 01 Dec	British Airways
26 Nov - 03 Dec	British Airways
23 Nov - 05 Dec	British Airways
23 Nov - 02 Dec	British Airways
24 Nov - 30 Nov	British Airways
26 Nov - 29 Nov	British Airways
30 Nov - 14 Dec	British Airways
25 Nov - 02 Dec	British Airways
25 Nov - 16 Dec	British Airways
25 Nov - 30 Nov	British Airways
28 Nov - 30 Nov	British Airways

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

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 November from $971

Return flights