AirHint found the following cheapest one-way flights from Ontario (ONT) to Guatemala City (GUA) in December 2025 (see full year).
One-Way flights
| 08 Dec | Frontier Airlines | ||
| 05 Dec | Frontier Airlines | ||
| 02 Dec | Frontier Airlines | ||
| 09 Dec | Volaris | ||
| 24 Dec | Volaris | ||
| 25 Dec | Volaris | ||
| 04 Dec | Avianca | ||
| 27 Dec | Avianca | ||
| 30 Dec | Avianca | ||
| 07 Dec | Volaris |
Also check the deals for return flights from Ontario to Guatemala City in December.
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