May is the cheapest month to fly this route, with average fares around $574 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $574 | $492 | Best | |
| June 2026 | $603 | $492 | ||
| July 2026 | $575 | $505 | ||
| August 2026 | $723 | $605 | Peak |
Departing on Monday offers the lowest average fares at $544. Friday departures are the most expensive at $660, a difference of $116.
The best time to fly is May. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from Portland to Reykjavik is May, with average round-trip fares around $574. The lowest fare found in May is $492.
Monday departures are the cheapest, averaging $544 round trip. The most expensive day is Friday at $660.
Based on current pricing trends, booking for May travel offers the best value. Avoid August if possible, as fares average $723 compared to $574 in the cheapest month. June is a solid middle-ground option at $603.
Flying in May instead of August can save you approximately $149 per round trip. The cheapest month averages $574 while the most expensive averages $723.
Airlines, flight times, price calendar, and more for Portland to Reykjavik
View PDX → KEF Details