Cheapest return flights from London to Boston in April from $518

AirHint found the following cheapest return flights from London (LCY) to Boston (BOS) in April 2026 (see full year).

Return flights

15 Apr - 23 Apr Lufthansa
16 Apr - 23 Apr Lufthansa
30 Apr - 07 May Lufthansa
16 Apr - 19 Apr SWISS
17 Apr - 23 Apr Lufthansa
21 Apr - 27 Apr SWISS
29 Apr - 05 May SWISS
28 Apr - 04 May SWISS
30 Apr - 06 May SWISS
15 Apr - 21 Apr British Airways
20 Apr - 27 Apr Lufthansa
21 Apr - 30 Apr Lufthansa
16 Apr - 28 Apr Lufthansa
14 Apr - 21 Apr Lufthansa
28 Apr - 28 May Lufthansa
27 Apr - 03 May Lufthansa
30 Apr - 17 May Lufthansa
27 Apr - 11 May Delta
17 Apr - 08 May KLM
23 Apr - 13 May KLM

Also check the deals for one-way flights from London to Boston in April.

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