AirHint found the following cheapest return flights from San Juan (SJU) to Tokyo (HND) in December 2025 (see full year).
Return flights
| 31 Dec - 11 Jan | Delta | ||
| 04 Dec - 11 Dec | United | ||
| 29 Dec - 07 Jan | Delta | ||
| 20 Dec - 23 Dec | United |
Also check the deals for one-way flights from San Juan to Tokyo in December.
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