Frontier AirlinesDepart06:00
Thu, Dec 10ONT → DEN
2h 24m · Direct
$24one way, per person
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- Cheapest fare
- $24
- Cheapest month
- December
- Direct flights
- Yes
- Flight time
- 2h 15m
Frontier Airlines · Thu, Dec 10
from $24
Frontier Airlines and Southwest Airlines
1,340 km
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Cheapest month to fly from Los Angeles to Denver
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in December 2026
The lowest fares we've seen for each day, cheapest first.
See every date in December 2026 →
Plan the rest of your trip to Denver
Where to stay, what to do and getting around, from our travel partners.
About flights from Los Angeles to Denver
Los Angeles (LAX) and Denver (DEN) are about 1,340 km apart. Direct flights take around 2h 15m, and recent direct fares were with Frontier Airlines and Southwest Airlines. Over the next few months, one-way fares start from $24, and December 2026 is currently the cheapest month to fly.
These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.
Frequently asked questions
How much is a flight from Los Angeles to Denver?
The cheapest one-way fare we've seen recently is $24 with Frontier Airlines, departing Thursday, December 10, 2026. Over the coming months, the lowest fare in each month ranges from $24 to $33.
What is the cheapest month to fly from Los Angeles to Denver?
December 2026 currently has the lowest fares, from $24 one way.
Are there direct flights from Los Angeles to Denver?
Yes. Recent direct fares were with Frontier Airlines and Southwest Airlines.
How long is the flight from Los Angeles to Denver?
A direct flight takes about 2h 15m. Los Angeles and Denver are around 1,340 km apart.
Which airlines fly from Los Angeles to Denver?
Recent fares on this route were with Frontier Airlines and Southwest Airlines.
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