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
United Airlines
Flight Frequency
Daily Flights
6-11 flights
Weekly Flights
57
Typical Departure Time Ranges
Earliest Departure
05:05
Latest Departure
13:29
Route Intelligence Dashboard
Overall Connectivity Score
60
GoodRoute Diversity
1
Direct Routes
United 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
United Airlines flights from Ontario (ONT) to Denver (DEN)
United Airlines operates scheduled nonstop flights between Ontario (ONT) and Denver (DEN). United 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 13m - 2h 14m
05:05
13:29
822 miles (1323 km)
March
1 (Show)
57
United Airlines Terminal Information & Contact
Departure Terminal - Ontario (ONT)
Terminal: 2
Phone: 1-800-864-8331
Location: 2, Ontario, US
Arrival Terminal - Denver (DEN)
Terminal: 1
Phone: 1-800-864-8331
Location: 1, Denver, US
United Airlines Flight Schedule from Ontario (ONT) to Denver (DEN)
| Flight | Airline | Departure | Arrival | Aircraft |
|---|---|---|---|---|
UA1350 |  United Airlines | 05:05 | 08:19:00 | Boeing 737-900 Passenger |
UA1417 | United Airlines | 13:29 | 16:42:00 | Airbus A320 |
United Airlines Monthly Flight Calendar
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United Airlines Terminal Information
Departure Terminal at Ontario (ONT):
• Terminal : United Airlines operates from this terminal
Terminal 2:
• United Airlines Terminal Phone: 1-800-864-8331
Arrival Terminal at Denver (DEN):
• Terminal : United Airlines operates from this terminal
Terminal 1:
• United Airlines Terminal Phone: 1-800-864-8331
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 United 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
United Airlines Contact Information and Customer Services
United Airlines Address
233 S. Wacker Drive
Chicago, IL 60606, United States
Customer Service Phone
+1-800-864-8331Official Website
united.comFrequently Asked Questions
How many United Airlines flights operate from Ontario (ONT) to Denver (DEN)?
United 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 United 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 United Airlines use on this route?
United Airlines uses Boeing 737-900 Passenger, Airbus A320 on this route.
Which other airlines operate on this route?
2 other airlines operate on this route: Frontier Airlines, Southwest Airlines.
What are the earliest and latest United Airlines flight departure times?
The earliest United Airlines flight departs at 05:05 and the latest departs at 13:29.
View all United Airlines flights to Ontario (ONT) →
Popular United Airlines routes from Ontario include multiple destinations.
Route data verified regularly by Triposia Travel Research Team.