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

Return flights

05 Nov - 12 Nov	Icelandair	direct
02 Nov - 09 Nov	Icelandair	direct
03 Nov - 10 Nov	Icelandair	direct
01 Nov - 08 Nov	Icelandair	direct
04 Nov - 11 Nov	Icelandair	direct
19 Nov - 26 Nov	Icelandair	direct
15 Nov - 24 Nov	Icelandair	direct
15 Nov - 21 Nov	Icelandair	direct
20 Nov - 27 Nov	Icelandair	direct
21 Nov - 28 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 358€

Return flights