Cheapest one-way flights from Washington to London in January from $243

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

AirHint found the following cheapest one-way flights from Washington (IAD) to London (LGW) in January 2025 (see full year).

One-Way flights

26 Jan Frontier Airlines
22 Jan Icelandair
23 Jan Icelandair
14 Jan Icelandair
28 Jan Icelandair
21 Jan Icelandair
29 Jan Icelandair
30 Jan Icelandair
27 Jan Icelandair
12 Jan Avelo Airlines

Also check the deals for return flights from Washington to London in January.

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 London

Cheap car rent in London