Nonstop flights from Denver to Ontario

3 airlines fly this route, with up to 8 flights a day.

DENDenver International

817 mi · 53 flights a week

ONTOntario International

DENONT

When they leave

Denver time

8:45a10:29pFirst departure 8:45 AM, last 10:29 PM

Four in the morning, 8:45 AM to 11:25 AM, then two in the afternoon, 12:45 PM to 3:05 PM, then six in the evening, 5:50 PM to 10:29 PM.

Every flight

Earliest first

8:45 AM→10:04 AMFrontier AirlinesAirbus A320neoDaily
9:00 AM→10:15 AMSouthwest AirlinesUntil Mar 10, 2027Boeing 737Tue, Wed, Sun
9:05 AM→10:20 AMSouthwest AirlinesUntil Mar 10, 2027Boeing 737 MAX 8Mon, Tue, Wed, Thu, Fri, Sun
9:05 AM→10:20 AMSouthwest AirlinesUntil Mar 10, 2027Boeing 737Sat
11:25 AM→12:47 PMUnited AirlinesBoeing 737Daily
12:45 PM→2:00 PMSouthwest AirlinesUntil Mar 10, 2027Boeing 737 MAX 8Mon, Thu, Fri
3:05 PM→4:25 PMSouthwest AirlinesUntil Mar 10, 2027Boeing 737-700Sat
5:50 PM→7:20 PMSouthwest AirlinesUntil Mar 10, 2027Boeing 737Mon, Thu, Fri
6:05 PM→7:35 PMSouthwest AirlinesUntil Mar 10, 2027Boeing 737-700Sun
7:20 PM→8:42 PMUnited AirlinesBoeing 737Daily
7:30 PM→8:50 PMSouthwest AirlinesUntil Mar 10, 2027Boeing 737Sat
8:40 PM→10:00 PMSouthwest AirlinesUntil Mar 10, 2027Boeing 737Mon, Tue, Wed, Thu, Fri, Sun
10:29 PM→11:50 PMFrontier AirlinesAirbus A320neoDaily

Schedules last checked Sep 19, 2026. Times are local.

Flying from Denver to Ontario

Southwest Airlines flies most often, 3 to 4 times a day on the Boeing 737, Boeing 737 MAX 8 and Boeing 737-700. Frontier Airlines flies twice a day on the Airbus A320neo. United Airlines flies twice a day on the Boeing 737.

There are 7 or 8 flights every day of the week. The first arrival in Ontario is at 10:04 AM and the last at 11:50 PM. The flight covers 817 miles.

Southwest Airlines flies it until Mar 10, 2027.

Flying back, Ontario to Denver has 53 nonstop flights a week.