AirHint found the following cheapest one-way flights from Lisbon (LIS) to Boston (BOS) in April 2026 (see full year).
One-Way flights
| 12 Apr | LEVEL | ||
| 11 Apr | LEVEL | ||
| 17 Apr | Ryanair | ||
| 11 Apr | TAP | direct | |
| 12 Apr | TAP | direct |
Also check the deals for return flights from Lisbon to Boston in April.
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