Cheapest return flights from Washington to London in December from 554€

Best time to book flights for Washington (IAD) to London (LHR) flights at AirHint

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

Return flights

01 Dec - 08 Dec Scandinavian Airlines
29 Dec - 09 Jan Icelandair
26 Dec - 05 Jan TAP
29 Dec - 10 Jan TAP
26 Dec - 03 Jan TAP
29 Dec - 09 Jan British Airways direct
22 Dec - 02 Jan TAP
01 Dec - 08 Dec British Airways direct
29 Dec - 10 Jan British Airways direct
18 Dec - 25 Dec TAP
20 Dec - 02 Jan TAP
26 Dec - 05 Jan British Airways direct
18 Dec - 25 Dec British Airways direct
26 Dec - 03 Jan British Airways direct

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

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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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