Cheapest return flights from Billund to Keflavik in September from $245

AirHint found the following cheapest return flights from Billund (BLL) to Keflavik (KEF) in September 2025 (see full year).

Return flights

07 Sep - 14 Sep Fly Play direct
06 Sep - 13 Sep Lufthansa

Also check the deals for one-way flights from Billund to Keflavik in September.

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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