Cheapest return flights from Bangkok to Keflavik in September from $958

Best time to book flights for Bangkok (BKK) to Keflavik (KEF) flights at AirHint

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

Return flights

19 Sep - 28 Sep Qatar Airways
07 Sep - 20 Sep Finnair
04 Sep - 11 Sep Finnair
13 Sep - 20 Sep Finnair
14 Sep - 26 Sep Finnair
09 Sep - 23 Sep Qatar Airways
06 Sep - 11 Oct Finnair
06 Sep - 13 Sep Finnair
20 Sep - 26 Sep Finnair
16 Sep - 28 Sep Finnair
06 Sep - 18 Oct Finnair
24 Sep - 03 Oct Qatar Airways
22 Sep - 06 Oct Finnair
12 Sep - 21 Sep Austrian Airlines

Also check the deals for one-way flights from Bangkok 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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