July is the cheapest month to fly this route, with average fares around $637 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $873 | $778 | Peak | |
| June 2026 | $717 | $598 | ||
| July 2026 | $637 | $605 | Best | |
| August 2026 | $770 | $703 |
Departing on Monday offers the lowest average fares at $678. Friday departures are the most expensive at $775, a difference of $97.
The best time to fly is July. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from Denver to Reykjavik is July, with average round-trip fares around $637. The lowest fare found in July is $605.
Monday departures are the cheapest, averaging $678 round trip. The most expensive day is Friday at $775.
Based on current pricing trends, booking for July travel offers the best value. Avoid May if possible, as fares average $873 compared to $637 in the cheapest month. August is a solid middle-ground option at $770.
Flying in July instead of May can save you approximately $236 per round trip. The cheapest month averages $637 while the most expensive averages $873.
Airlines, flight times, price calendar, and more for Denver to Reykjavik
View DEN → KEF Details