Cheapest return flights from London to Keflavik in May from $302

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

Return flights

31 May - 10 Jun KLM
06 May - 13 May KLM
24 May - 28 May KLM
03 May - 10 May KLM
13 May - 19 May SWISS
20 May - 27 May KLM
17 May - 27 May KLM
17 May - 28 May KLM
24 May - 27 May KLM
10 May - 15 May KLM
10 May - 13 May KLM
31 May - 07 Jun KLM
27 May - 05 Jun KLM
29 May - 01 Jun Lufthansa
25 May - 01 Jun SWISS
29 May - 04 Jun SWISS
27 May - 02 Jun KLM
29 May - 07 Jun KLM
29 May - 13 Jun KLM
25 May - 07 Jun KLM

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

Powered by

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 Keflavik

Cheap car rent in Keflavik

Feel free to contact us with any feedback or request another flight research.