Direct flights from Denver to Ontario
All flights from DEN to ONT non-stop. There are direct flights from Denver International (DEN), Colorado, USA to Ontario International Airport (ONT), California, USA with Southwest Airlines, Frontier Airlines and United Airlines. 55 weekly departures are currently scheduled on this route. Departure times range from 07:45 to 22:55 depending on the schedule period. The flight distance is 822 miles (1323 km). Flight time ranges from 2 hours and 15 minutes to 2 hours and 30 minutes.
Denver
, USA
Airlines with non-stop routes:
Southwest Airlines
Frontier Airlines
United Airlines
Flight schedule from Denver to Ontario with Southwest Airlines
This is a weekly direct flight schedule for Southwest Airlines. Use the arrows or click on the date to change week. Click on any flight departure time to show more information and check availability.
Flight
The timetable & schedule information was updated at 2026-07-13
Flight schedule from Denver to Ontario with Frontier Airlines
This is a weekly direct flight schedule for Frontier Airlines. Use the arrows or click on the date to change week. Click on any flight departure time to show more information and check availability.
Flight
The timetable & schedule information was updated at 2026-07-13
Flight schedule from Denver to Ontario with United Airlines
This is a weekly direct flight schedule for United Airlines. Use the arrows or click on the date to change week. Click on any flight departure time to show more information and check availability.
Flight
The timetable & schedule information was updated at 2026-07-13
Denver to Ontario scheduled departures
Select a date to see every published non-stop departure between DEN and ONT.
DEN - ONT route facts
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Distance822 miles (1323 km)
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Flight time2 hours and 15 minutes to 2 hours and 30 minutes
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Airlines Southwest Frontier United
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Airline alliancesLow-cost carrier Star Alliance
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CabinsEconomy Business First
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Hub airportsUnited Airlines: DEN
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Arrival terminalsSouthwest Airlines: Terminal 4United Airlines: Terminal 2
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AircraftSouthwest Airlines: Boeing 737MAX 8 Passenger, Boeing 737-700 Passenger (Scimitar Winglets) and Boeing 737-800 (winglets) Passenger/BBJ2Frontier Airlines: Airbus A320neo, Airbus A320, Airbus A321neo and Airbus A321United Airlines: Airbus A320, Boeing 737-800 Passenger, Boeing 737-900 Passenger, Boeing 737MAX 9 Passenger and Boeing 737MAX 8 Passenger
Route FAQ
Direct flights from Denver to CA, USA
From Denver to Arcata
ACV Arcata
From Denver to San Francisco
SFO San Francisco International
From Denver to Monterey
MRY Monterey Peninsula
From Denver to Santa Rosa
STS Charles M Schulz Sonoma Co
From Denver to San Luis Obispo
SBP San Luis County Regional Airport
From Denver to Carlsbad
CLD McClellan-Palomar Airport
From Denver to Redding
RDD Redding Muni
From Denver to Bishop
BIH Eastern Sierra Regional Airport
From Denver to San Jose
SJC Norman Y Mineta San Jose International
From Denver to Oakland
OAK Metropolitan Oakland International
