Cheapest return flights from Washington to London in April from $670

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

AirHint found the following cheapest return flights from Washington (IAD) to London (LCY) in April 2026 (see full year).

Return flights

01 Apr - 10 Apr Lufthansa
01 Apr - 11 Apr SWISS
11 Apr - 18 Apr ITA Airways
02 Apr - 07 Apr British Airways

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

Cheap car rent in London