AirHint found the following cheapest return flights from St. Louis (STL) to Tokyo (NRT) in December 2025 (see full year).
Return flights
| 10 Dec - 17 Dec | Air Canada | ||
| 12 Dec - 12 Jan | Frontier Airlines | ||
| 29 Dec - 05 Jan | Frontier Airlines | ||
| 25 Dec - 03 Jan | United |
Also check the deals for one-way flights from St. Louis to Tokyo in December.
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