Cheapest one-way flights from London to Washington in April from 423€

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

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

One-Way flights

28 Apr British Airways
23 Apr British Airways
08 Apr Scandinavian Airlines
10 Apr Scandinavian Airlines
04 Apr Aer Lingus
17 Apr British Airways
29 Apr TAP
28 Apr British Airways direct
23 Apr British Airways direct
17 Apr British Airways direct

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

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