AirHint found the following cheapest return flights from Ontario (ONT) to Vientiane (VTE) in December 2025 (see full year).
Return flights
| 06 Dec - 17 Dec | China Airlines | ||
| 24 Dec - 20 Jan | China Airlines | ||
| 23 Dec - 15 Jan | China Airlines | ||
| 23 Dec - 21 Jan | China Airlines |
Also check the deals for one-way flights from Ontario to Vientiane in December.
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