Flights operate between Ontario (ONT) and Denver (DEN).
1 airline operates this route with 6-11 flights daily flights.
Average flight time is 2h 10m - 2h 29m.
Route distance is 822 miles (1323 km).
Route Distance
822 miles (1323 km)
Average Duration
2h 10m - 2h 29m
Airlines Operating This Route
Frontier Airlines
Flight Frequency
Daily Flights
6-11 flights
Weekly Flights
57
Typical Departure Time Ranges
Earliest Departure
00:58
Latest Departure
19:06
Route Intelligence Dashboard
Overall Connectivity Score
60
GoodRoute Diversity
1
Direct Routes
Frontier Airlines serves 1 destination from ONT
Weekly Frequency
14
Weekly Flights
Trend: Stable
Top 1 Most Frequent Routes - Details
| Route | Weekly Flights | Duration | Distance | Reliability |
|---|---|---|---|---|
| ONT → Denver (DEN) (DEN) | 14/week | 2h 10m - 2h 29m | 822 km | Moderate |
Flight Schedule & Filters
Frontier Airlines flights from Ontario (ONT) to Denver (DEN)
Frontier Airlines operates scheduled nonstop flights between Ontario (ONT) and Denver (DEN). Frontier Airlines operates 6-11 flights daily flights on this route.• Flight Duration: 2h 10m - 2h 29m (average flight time)• Distance: 822 miles (1323 km) (air miles between airports)• Daily Flights: 6-11 flights (scheduled departures per day)
Ontario (ONT)
US
Denver (DEN)
US
FLIGHT TIME
2h 10m - 2h 29m
FLIGHT DISTANCE
822 miles (1323 km)
2h 22m - 2h 27m
00:58
19:06
822 miles (1323 km)
March
1 (Show)
57
Frontier Airlines Terminal Information & Contact
Departure Terminal - Ontario (ONT)
Terminal: 2
Phone: 47 67 59 30 00
Location: 2, Ontario, US
Arrival Terminal - Denver (DEN)
Terminal: 1
Phone: 1 866-807-7258
Location: 1, Denver, US
Frontier Airlines Flight Schedule from Ontario (ONT) to Denver (DEN)
| Flight | Airline | Departure | Arrival | Aircraft |
|---|---|---|---|---|
F91500 |  Frontier Airlines | 00:58 | 04:20:00 | Airbus A320 |
F91262 | Frontier Airlines | 19:06 | 22:33:00 | Airbus A320neo |
Frontier Airlines Monthly Flight Calendar
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Frontier Airlines Terminal Information
Departure Terminal at Ontario (ONT):
Terminal 2:
• Frontier Airlines Terminal Phone: 47 67 59 30 00
Arrival Terminal at Denver (DEN):
Terminal 1:
• Frontier Airlines Terminal Phone: 1 866-807-7258
Weather & Climate at Denver (DEN)
10.0°C
Avg Temperature52mm
Avg Rainfall11.5km/h
Avg Wind Speed52%
Avg HumidityBest Months to Visit
Challenging Months
12-Month Weather Overview
Wind Speed by Month
Humidity by Month
Best Time to Book Flights to Denver (DEN)
Best Booking Window
Book 2-3 months in advance for best prices
Booking Tip
Avoid booking during extreme weather months for better deals
Peak Travel Months
Expect higher prices and more crowds during these months. Book early to secure better rates.
Recommended Months
These months offer the best balance of weather, prices, and availability.
Monthly Booking Recommendations
Flight Price Trends for Denver (DEN)
Cheapest Months to Fly
Book flights during these months for the best deals and lowest prices.
Most Expensive Months
Prices are typically highest during these months. Consider booking well in advance or choosing alternative dates.
Price Trend Analysis
Prices are typically lower during shoulder seasons
Monthly Price Trends
Best Months to Fly Frontier Airlines to Denver (DEN)
Best Months
Optimal conditions for travel with favorable weather, prices, and availability.
Shoulder Season
Transition periods with moderate conditions. Good balance of price and experience.
Challenging Months
These months may have less favorable conditions. Plan accordingly and book early.
Seasonal Insight
Best travel months: 2025-07, 2025-08, 2025-09
Seasonal Travel Calendar
Frontier Airlines Contact Information and Customer Services
Frontier Airlines Address
4545 Airport Way
Denver, Colorado 80239, United States
Official Website
flyfrontier.comFrequently Asked Questions
How many Frontier Airlines flights operate from Ontario (ONT) to Denver (DEN)?
Frontier Airlines operates 2 flights from Ontario (ONT) to Denver (DEN).
What city does Denver (DEN) airport serve?
Denver (DEN) airport serves Denver, US.
How long is the Frontier Airlines flight from Ontario (ONT) to Denver (DEN)?
The flight duration is approximately 2h 10m - 2h 29m.
What is the distance from Ontario (ONT) to Denver (DEN)?
The distance is 822 miles (1323 km).
What aircraft does Frontier Airlines use on this route?
Frontier Airlines uses Airbus A320, Airbus A320neo on this route.
Which other airlines operate on this route?
2 other airlines operate on this route: United Airlines, Southwest Airlines.
What are the earliest and latest Frontier Airlines flight departure times?
The earliest Frontier Airlines flight departs at 00:58 and the latest departs at 19:06.
View all Frontier Airlines flights to Ontario (ONT) →
Popular Frontier Airlines routes from Ontario include multiple destinations.
Route data verified regularly by Triposia Travel Research Team.