Cheapest return flights from London to Keflavik in October from $410

Best time to book flights for London (LCY) to Keflavik (KEF) flights at AirHint

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

Return flights

02 Oct - 05 Oct British Airways
09 Oct - 12 Oct British Airways
14 Oct - 21 Oct SWISS
07 Oct - 14 Oct SWISS
08 Oct - 16 Oct KLM
20 Oct - 23 Oct Lufthansa
08 Oct - 12 Oct KLM
01 Oct - 05 Oct KLM
02 Oct - 06 Oct KLM
05 Oct - 15 Oct KLM
29 Oct - 02 Nov British Airways
25 Oct - 02 Nov KLM

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

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.

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