Cheapest one-way flights from London to Washington in December from 564€
AirHint found the following cheapest one-way flights from London (LHR) to Washington (IAD) in December 2025 (see full year).
One-Way flights
| 12 Dec | Aer Lingus | ||
| 18 Dec | TAP | ||
| 06 Dec | Aer Lingus | ||
| 06 Dec | Delta | direct | |
| 12 Dec | Air France | direct | |
| 23 Dec | Finnair | direct | |
| 18 Dec | Finnair | direct |
Also check the deals for return flights from London to Washington in December.
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.
