AirHint found the following cheapest return flights from Ontario (ONT) to Guatemala City (GUA) in October 2025 (see full year).

Return flights

07 Oct - 16 Oct	Avianca
02 Oct - 23 Oct	Avianca
02 Oct - 07 Oct	Avianca
16 Oct - 21 Oct	Avianca
16 Oct - 30 Oct	Avianca
18 Oct - 25 Oct	American Airlines
18 Oct - 01 Nov	Avianca
05 Oct - 14 Oct	jetBlue
30 Oct - 06 Nov	Avianca
12 Oct - 21 Oct	jetBlue
20 Oct - 01 Nov	jetBlue
17 Oct - 25 Oct	jetBlue
30 Oct - 18 Nov	Avianca
06 Oct - 27 Oct	jetBlue
19 Oct - 01 Nov	jetBlue
18 Oct - 05 Nov	Avianca

Also check the deals for one-way flights from Ontario to Guatemala City in October.

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 Guatemala City in October from $219

Return flights