🇺🇸 ONT
Ontario
818 mi
DEN 🇺🇸
Denver

Ontario to Denver Flights

Ontario International Airport Denver International Airport 5 airlines

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The Ontario to Denver route connects Ontario International Airport (ONT) in US with Denver International Airport (DEN) in US. This short-haul flight covers approximately 818 miles (1316 km) with a typical flight time of 1h 45m. This route is served by 5 airlines: Southwest, United, Frontier and others. AirportRoutes has tracked 22 unique flight numbers on this route.

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Departure Airport

Ontario International Airport

ICAO Code:
KONT
IATA Code:
ONT
City:
🇺🇸 Ontario
Country:
US
Elevation:
944 ft

Destination Airport

Denver International Airport

ICAO Code:
KDEN
IATA Code:
DEN
City:
🇺🇸 Denver
Country:
US
Elevation:
5431 ft

5

Operators

22

Tracked Flights

818

Miles

1h 45m

Flight Duration

Route Map

Great Circle
Flight route map from Ontario to Denver
Map data © Mapbox © OpenStreetMap contributors

Operating Airlines

Airline ICAO IATA
Southwest SWA WN
United UAL UA
Frontier FFT F9
United Parcel Service UPS 5X
Air Transport International, Inc. ATN 8C

Flight Schedule Pattern

Day Flights Observed Frequency Activity
Monday 16 11%
Tuesday 17 12%
Wednesday 27 18%
Thursday 33 22%
Friday 16 11%
Saturday 15 10%
Sunday 23 16%

Pattern Analysis

22 Tracked Flights:
Data Points: 147
API observations used to build this analysis
Weekdays: 109 flights
Weekend: 38 flights
Business Route More active on weekdays

All Flight Routes

5 Routes
Note: This table shows aggregated route data by airline. Each airline may operate multiple daily flights at different times. See the "Spotted Departure Times" section below for all observed departure times.
Airline Flight Numbers Aircraft Type Typical Time Days Active Last Seen Status
B763 03:20 3:20 AM (Representative)
M T W T F S S
Jun 20, 2026 Active
Frontier
FFT / F9
A20N 10:50 10:50 AM (Representative)
M T W T F S S
Jun 29, 2026 Active
Southwest
SWA / WN
B38M 06:25 6:25 AM (Representative)
M T W T F S S
Jun 29, 2026 Active
United
UAL / UA
A320 18:30 6:30 PM (Representative)
M T W T F S S
Jun 29, 2026 Active
B763 01:40 1:40 AM (Representative)
M T W T F S S
Jun 20, 2026 Active
Total Routes: 5
Active Routes: 5
Unique Airlines: 5
Aircraft Types: 5

Spotted Departure Times

Departure Time Operator ICAO IATA
01:40 1:40 AM United Parcel Service UPS 5X
03:20 3:20 AM Air Transport International, Inc. ATN 8C
06:25 6:25 AM Southwest SWA WN
10:50 10:50 AM Frontier FFT F9
18:30 6:30 PM United UAL UA

Time Information

Times are shown in the departure airport's local timezone (KONT - America/Los_Angeles).

Total Departure Times: 5
Time Range:
01:40 - 18:30
These are typical departure times observed from actual flights. Times may vary by season and schedule changes.