AirHint found the following cheapest return flights from London (STN) to Keflavik (KEF) in June 2025 (see full year).

Return flights

15 Jun - 25 Jun	Fly Play	direct
19 Jun - 25 Jun	Fly Play	direct
13 Jun - 19 Jun	Fly Play	direct
15 Jun - 19 Jun	Fly Play	direct
25 Jun - 09 Jul	Fly Play	direct
15 Jun - 20 Jun	Fly Play	direct
15 Jun - 18 Jun	Fly Play	direct
25 Jun - 01 Jul	Ryanair
23 Jun - 25 Jun	Fly Play	direct
17 Jun - 24 Jun	Ryanair
17 Jun - 19 Jun	Ryanair
13 Jun - 26 Jun	Fly Play	direct
30 Jun - 03 Jul	Ryanair
30 Jun - 07 Jul	Ryanair
23 Jun - 01 Jul	Ryanair
29 Jun - 03 Jul	Ryanair
11 Jun - 20 Jul	Ryanair
29 Jun - 01 Jul	Ryanair
25 Jun - 02 Jul	Ryanair
30 Jun - 02 Jul	Ryanair

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 162€

Return flights