Cheapest return flights from Seoul to London in April from $723

Best time to book flights for Seoul (ICN) to London (LHR) flights at AirHint

AirHint found the following cheapest return flights from Seoul (ICN) to London (LHR) in April 2026 (see full year).

Return flights

01 Apr - 14 Apr KLM
15 Apr - 21 Apr Finnair
15 Apr - 22 Apr Finnair
01 Apr - 08 Apr Finnair
06 Apr - 14 Apr Finnair
20 Apr - 27 Apr Finnair
01 Apr - 15 Apr Finnair
20 Apr - 30 Apr Finnair
07 Apr - 16 Apr Finnair
12 Apr - 21 Apr Finnair
29 Apr - 05 May Lufthansa
22 Apr - 02 May Finnair
30 Apr - 06 May Finnair
29 Apr - 06 May Lufthansa
24 Apr - 01 May Finnair
25 Apr - 02 May Air China
25 Apr - 03 May Air China
26 Apr - 05 May LOT
22 Apr - 02 May Asiana Airlines direct
29 Apr - 05 May Asiana Airlines direct

Also check the deals for one-way flights from Seoul 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