Los Angeles to Denver in September 2026

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

Lowest this month $55

Highest this month $135

Sample fare $55

Airports LAX–DEN

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September 2026 price calendar

From $55 · up to $135

Mon

Tue

Wed

Thu

Fri

Sat

Sun

1 $129 2 $135 3 $106 4 $106 5 $106 6 $106 7 $106 8 $106 9 $76 10 $66 11 $55

Denver DEN

$55

Sep 11, 6:05am · 2h 27m · 0 stops

LAX → DEN · Frontier Airlines

Denver DEN

$76

Sep 09, 2:01pm · 2h 31m · 0 stops

LAX → DEN · Frontier Airlines

Denver DEN

$129

Sep 01, 6:30am · 2h 33m · 0 stops

LAX → DEN · Frontier Airlines

Denver DEN

$135

Sep 02, 3:13pm · 5h 3m · 1 stop

ONT → DEN · Frontier Airlines

This page is only September 2026 on the Los Angeles 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 Los Angeles to Denver in September 2026.