Phoenix to Denver in September 2026

Dated one-way fares from Phoenix to Denver in September 2026. Use the calendar to see which days are cheaper.

Lowest this month $104

Highest this month $115

Sample fare $104

Airports PHX–DEN

Ad. Ticket links are affiliate ads. We may earn a commission if you book. Advertising disclosure

September 2026 price calendar

From $104 · up to $115

Mon

Tue

Wed

Thu

Fri

Sat

Sun

1 $115 2 $104

Denver DEN

$104

Sep 02, 8:35am · 1h 58m · 0 stops

PHX → DEN · Frontier Airlines

Denver DEN

$115

Sep 01, 2:15pm · 1h 55m · 0 stops

PHX → DEN · Frontier Airlines

This page is only September 2026 on the Phoenix to Denver route. Open the full route if you want the next months side by side.

Prices move as seats sell. Confirm the live itinerary before you book Phoenix to Denver in September 2026.