Cheapest return flights from London to Washington in December from 599€

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

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

Return flights

08 Dec - 12 Dec TAP
08 Dec - 14 Dec Icelandair
19 Dec - 26 Dec TAP
14 Dec - 04 Jan Icelandair
14 Dec - 20 Dec Icelandair
22 Dec - 28 Dec TAP
08 Dec - 12 Dec Virgin Atlantic direct
19 Dec - 04 Jan TAP
19 Dec - 02 Jan TAP
21 Dec - 02 Jan TAP
20 Dec - 03 Jan TAP
26 Dec - 02 Jan TAP
21 Dec - 04 Jan TAP
19 Dec - 26 Dec Virgin Atlantic direct
22 Dec - 28 Dec British Airways direct
14 Dec - 04 Jan British Airways direct
14 Dec - 20 Dec Iberia direct
21 Dec - 04 Jan British Airways direct
19 Dec - 02 Jan British Airways direct

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

Skyscanner

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.

Book a cheap hotel in Washington

Cheap car rent in Washington