AirHint found the following cheapest return flights from London (LHR) to Keflavik (KEF) in June 2026 (see full year).

Return flights

01 Jun - 13 Jun	British Airways	direct
01 Jun - 06 Jun	British Airways	direct
03 Jun - 10 Jun	British Airways	direct
01 Jun - 01 Jul	Scandinavian Airlines
12 Jun - 19 Jun	British Airways	direct
01 Jun - 07 Jun	Scandinavian Airlines
05 Jun - 07 Jun	Scandinavian Airlines
07 Jun - 14 Jun	Icelandair	direct
01 Jun - 07 Jun	Icelandair	direct
05 Jun - 07 Jun	Icelandair	direct
16 Jun - 23 Jun	Lufthansa

Also check the deals for one-way flights from London to Keflavik in June.

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 London to Keflavik in June from $232

Return flights