August is the cheapest month to fly this route, with average fares around $225 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $246 | $220 | Peak | |
| June 2026 | $241 | $210 | ||
| July 2026 | $231 | $210 | ||
| August 2026 | $225 | $210 | Best |
Departing on Wednesday offers the lowest average fares at $216. Sunday departures are the most expensive at $250, a difference of $34.
The best time to fly is August. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from Chicago to Phoenix is August, with average round-trip fares around $225. The lowest fare found in August is $210.
Wednesday departures are the cheapest, averaging $216 round trip. The most expensive day is Sunday at $250.
Based on current pricing trends, booking for August travel offers the best value. Avoid May if possible, as fares average $246 compared to $225 in the cheapest month. June is a solid middle-ground option at $241.
Flying in August instead of May can save you approximately $21 per round trip. The cheapest month averages $225 while the most expensive averages $246.
Airlines, flight times, price calendar, and more for Chicago to Phoenix
View ORD → PHX Details