AirHint found the following cheapest return flights from Grand Rapids (GRR) to Milano (MXP) in December 2025 (see full year).
Return flights
| 07 Dec - 14 Dec | Delta | ||
| 23 Dec - 17 Jan | KLM | ||
| 22 Dec - 17 Jan | Frontier Airlines |
Also check the deals for one-way flights from Grand Rapids to Milano in December.
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