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

Return flights

09 Apr - 06 May	Etihad Airways
15 Apr - 25 Apr	LOT
01 Apr - 20 Apr	LOT
15 Apr - 22 Apr	Air France
20 Apr - 03 May	Scandinavian Airlines
30 Apr - 04 May	LOT
13 Apr - 24 Apr	Air France
14 Apr - 21 Apr	Air France
08 Apr - 15 Apr	Air France
06 Apr - 08 May	Air France
29 Apr - 05 May	Air France
28 Apr - 05 May	Air France
27 Apr - 05 May	Air France
27 Apr - 04 May	Air France
30 Apr - 10 May	LOT
06 Apr - 20 Apr	Air France
12 Apr - 26 Apr	Air France
29 Apr - 09 May	LOT
01 Apr - 11 Apr	LOT
12 Apr - 21 Apr	Air France

Also check the deals for one-way flights from Seoul to London in April.

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.

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Cheapest return flights from Seoul to London in April from $1017

Return flights