AirHint found the following cheapest return flights from Oakland (OAK) to Keflavik (KEF) in July 2025 (see full year).

Return flights

29 Jul - 08 Aug	Alaska Airlines
07 Jul - 18 Jul	Icelandair
22 Jul - 27 Jul	Icelandair
15 Jul - 22 Jul	Icelandair
10 Jul - 17 Jul	Icelandair
13 Jul - 22 Jul	Icelandair
22 Jul - 29 Jul	Icelandair
02 Jul - 07 Jul	Icelandair
03 Jul - 07 Jul	Sun Country Airlines

Also check the deals for one-way flights from Oakland to Keflavik in July.

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 Oakland to Keflavik in July from $1018

Return flights