AirHint found the following cheapest one-way flights from Miami (MIA) to Boston (BOS) in May 2026 (see full year).
One-Way flights
| 30 May | Spirit Airlines | direct | |
| 31 May | Spirit Airlines | direct | |
| 06 May | American Airlines | direct | |
| 01 May | Spirit Airlines | direct |
Also check the deals for return flights from Miami to Boston in May.
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