AirHint found the following cheapest return flights from Denver (DEN) to Keflavik (KEF) in November 2025 (see full year).

Return flights

13 Nov - 20 Nov	Icelandair	direct
16 Nov - 20 Nov	Icelandair	direct
06 Nov - 14 Nov	Icelandair	direct
07 Nov - 18 Nov	Icelandair	direct
19 Nov - 23 Nov	Icelandair	direct
03 Nov - 08 Nov	Icelandair	direct
26 Nov - 01 Dec	Icelandair	direct
22 Nov - 01 Dec	Icelandair
25 Nov - 29 Nov	Air Canada
25 Nov - 29 Nov	Icelandair	direct

Also check the deals for one-way flights from Denver to Keflavik in November.

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 Denver to Keflavik in November from $381

Return flights