AirHint found the following cheapest return flights from Portland (PDX) to Keflavik (KEF) in April 2026 (see full year).

Return flights

14 Apr - 21 Apr	SWISS
12 Apr - 19 Apr	Air Canada
16 Apr - 23 Apr	Air Canada
09 Apr - 16 Apr	Air Canada
13 Apr - 20 Apr	Icelandair	direct
17 Apr - 24 Apr	Lufthansa
10 Apr - 17 Apr	Lufthansa
11 Apr - 18 Apr	Lufthansa
15 Apr - 22 Apr	Virgin Atlantic

Also check the deals for one-way flights from Portland to Keflavik in April.

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 Portland to Keflavik in April from 501€

Return flights