Direct (non-stop) flights from Ontario (ONT) to Denver (DEN)
Find comprehensive flight information, schedules, and booking details for direct flights from Ontario (ONT) to Denver (DEN). This popular route is operated by 3 airlines, offering multiple daily departures.• 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)
Denver (DEN)
FLIGHT TIME
2h 10m - 2h 29m
FLIGHT DISTANCE
822 miles (1323 km)
2h 10m - 2h 27m
00:58
19:06
822 miles (1323 km)
March
3 (Show)
57
Flight Schedule
December 2025
Airlines with direct flights from Ontario (ONT) to Denver (DEN)
Route Insights
Duration variability: Flight duration on this route can vary based on aircraft type, wind conditions, and airline scheduling. Average duration is 2h 10m - 2h 29m.
Pricing patterns: March typically offers lower prices due to reduced demand outside peak travel seasons.
Best departure times: Peak departure times are 5:00, 0:00, 8:00, offering more flight options and potentially better connections.
Ontario (ONT) - Denver (DEN) flight price statistics
$158
ApproximateThe numbers are average prices found based on user searches for direct flights between the airports. It's calculated from the cheapest prices found per month for a round-trip with 1 adult and can vary depending on the amount of data we have for this particular route.
$79
Jan$45
Feb$39
Mar$46
Apr$78
May$154
Jun$110
Jul$165
Aug$128
Sep$238
Oct$238
Nov$578
DecRelated Information
Airports: ONT • DEN Airport
Airlines operating this route: Frontier Airlines (F9), United Airlines, Southwest Airlines
Frequently Asked Questions
How many flights operate from ONT to DEN?
There are 8 direct flights operating from ONT to DEN. Approximately 6-11 flights daily.
Which airlines operate flights from ONT to DEN?
3 airlines operate on this route: Frontier Airlines, United Airlines, Southwest Airlines.
How long is the flight from ONT to DEN?
The flight duration from ONT to DEN is approximately 2h 10m - 2h 29m.
What is the distance from ONT to DEN?
The distance from ONT to DEN is 822 miles (1323 km).
What is the flight time range for this route?
Flight times on this route range from 2h 10m - 2h 27m.
What are the earliest and latest flight departure times?
The earliest flight departs at 00:58 and the latest flight departs at 19:06.
What is the cheapest month to fly from ONT to DEN?
March is typically the cheapest month to fly on this route.
How many flights operate per week on this route?
Approximately 57 flights operate per week from ONT to DEN.
What types of aircraft operate on this route?
This route is served by Airbus A320, Boeing 737-900 Passenger, Boeing 737-800 (winglets) Passenger/BBJ2, Boeing 737-700 (winglets) Passenger/BBJ1, Boeing 737MAX 8 Passenger and 1 more aircraft type.
What is the average flight price from ONT to DEN?
The average flight price for a round-trip ticket from ONT to DEN is approximately $158 USD. Prices can vary based on booking time, season, and airline.
When is the best time to book flights from ONT to DEN for the lowest prices?
March is typically the cheapest month to fly from ONT to DEN. Booking in advance and avoiding peak travel seasons can help you find better deals.
How many airlines offer flights from ONT to DEN?
3 airlines offer direct flights from ONT to DEN, providing travelers with multiple options for scheduling and pricing.
How far is DEN from ONT?
The distance from ONT to DEN is 822 miles (1323 km). This is a long-haul flight route.
How long does it take to fly from ONT to DEN?
The flight time from ONT to DEN is approximately 2h 10m - 2h 29m. Actual flight duration may vary based on weather conditions, aircraft type, and routing.