AirHint found the following cheapest return flights from Washington (IAD) to London (LHR) in November 2025 (see full year).

Return flights

16 Nov - 02 Dec	TAP
29 Nov - 05 Dec	TAP
16 Nov - 06 Dec	TAP
16 Nov - 04 Dec	TAP
10 Nov - 06 Dec	TAP
30 Nov - 08 Dec	TAP
29 Nov - 06 Dec	TAP
11 Nov - 09 Dec	Icelandair
11 Nov - 18 Nov	Icelandair
12 Nov - 19 Nov	Icelandair
19 Nov - 26 Nov	Icelandair
10 Nov - 23 Nov	Icelandair
24 Nov - 02 Dec	Icelandair
18 Nov - 24 Nov	Icelandair
19 Nov - 24 Nov	Icelandair
13 Nov - 20 Nov	Icelandair
18 Nov - 25 Nov	Icelandair
27 Nov - 04 Dec	Icelandair
17 Nov - 23 Nov	Icelandair
10 Nov - 17 Nov	Icelandair

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

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Washington to London in November from $424

Return flights