Cheapest return flights from Washington to London in April from $440

AirHint found the following cheapest return flights from Washington (IAD) to London (LHR) in April 2026 (see full year).

Return flights

17 Apr - 24 Apr TAP
21 Apr - 26 Apr TAP
11 Apr - 18 Apr TAP
24 Apr - 27 Apr TAP
11 Apr - 19 Apr TAP
11 Apr - 25 Apr TAP
23 Apr - 27 Apr TAP
13 Apr - 05 May TAP
16 Apr - 09 May TAP
23 Apr - 02 May TAP
30 Apr - 05 May TAP
12 Apr - 21 Apr TAP
08 Apr - 15 Apr TAP
10 Apr - 13 Apr Scandinavian Airlines
10 Apr - 02 May Icelandair
22 Apr - 02 May TAP
29 Apr - 04 May TAP
29 Apr - 04 May American Airlines direct
30 Apr - 07 May British Airways direct
22 Apr - 02 May Air France direct

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

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