AirHint found the following cheapest return flights from Bilbao (BIO) to Boston (BOS) in April 2026 (see full year).
Return flights
| 03 Apr - 14 Apr | TAP | ||
| 06 Apr - 11 Apr | TAP | ||
| 02 Apr - 11 Apr | TAP | ||
| 23 Apr - 02 May | TAP | ||
| 01 Apr - 07 Apr | TAP | ||
| 24 Apr - 03 May | Lufthansa |
Also check the deals for one-way flights from Bilbao to Boston in April.
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