July is the cheapest month to fly this route, with average fares around $782 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $867 | $649 | ||
| June 2026 | $855 | $745 | ||
| July 2026 | $782 | $730 | Best | |
| August 2026 | $928 | $855 | Peak |
Departing on Tuesday offers the lowest average fares at $772. Thursday departures are the most expensive at $927, a difference of $155.
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 Chicago to Reykjavik is July, with average round-trip fares around $782. The lowest fare found in July is $730.
Tuesday departures are the cheapest, averaging $772 round trip. The most expensive day is Thursday at $927.
Based on current pricing trends, booking for July travel offers the best value. Avoid August if possible, as fares average $928 compared to $782 in the cheapest month. May is a solid middle-ground option at $867.
Flying in July instead of August can save you approximately $146 per round trip. The cheapest month averages $782 while the most expensive averages $928.
Airlines, flight times, price calendar, and more for Chicago to Reykjavik
View ORD → KEF Details