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

Return flights

03 Sep - 11 Sep	Air Canada
05 Sep - 13 Sep	Air Canada
10 Sep - 18 Sep	Air Canada
12 Sep - 20 Sep	Air Canada
04 Sep - 12 Sep	Air Canada
06 Sep - 14 Sep	Air Canada
09 Sep - 17 Sep	Air Canada
11 Sep - 19 Sep	Air Canada
16 Sep - 23 Sep	Air Canada
03 Sep - 10 Sep	Air Canada
23 Sep - 01 Oct	Virgin Atlantic
29 Sep - 07 Oct	Virgin Atlantic
30 Sep - 07 Oct	Virgin Atlantic
28 Sep - 06 Oct	Virgin Atlantic
29 Sep - 06 Oct	Air France
24 Sep - 01 Oct	Virgin Atlantic
27 Sep - 05 Oct	Icelandair	direct
30 Sep - 08 Oct	Icelandair	direct
27 Sep - 04 Oct	Icelandair	direct
28 Sep - 05 Oct	Icelandair	direct

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

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 Minneapolis to Keflavik in September from 321€

Return flights