Denver to Ontario (DEN–ONT) — Airlines, Schedules & Connections
No flights match your filters.
No nonstop flights on this route. connecting options below.
DEN–ONT is served by 3 airlines with nonstop service. Southwest Airlines, United Airlines and Frontier lead the route. The flight covers 818 miles in approximately 2h 20m. Beyond nonstop, 58 hubs offer 1-stop connections.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| WN Southwest Airlines | 26 | 737, 738, 7M8, 7S7 | 2h20-2h25 | – | – | |
| UA United Airlines Also: AC | 23 | 320, 738 | 2h23-2h26 | Star Alliance | AC | |
| F9 Frontier | 14 | 320, 32N | 2h26 | – | – |
Weekly Schedule Pattern
Connection Landscape
Other ways to reach Ontario from Denver
| Metric | DEN→ONT | COS→ONT |
|---|---|---|
| Distance from DEN | – | 73 mi |
| Nonstop airlines | 3 | 1 |
| Weekly flights | 90 | – |
| Flight time | 2h 20m | 1h 56m |
| Departure OTP | 91% | – |
Travel Essentials
DEN: MDT · ONT: PDT
When it's 6:00 PM in Denver, it's 5:00 PM in Ontario.
RTD A Line commuter rail runs from Denver Union Station to the airport (37 min, $10.50). Trains depart every 15 minutes during peak hours. The airport is 25 miles northeast of downtown; ride-shares cost $35–55 and take 30–45 minutes depending on I-70 traffic.Economy parking in lots 4–6 connects via free shuttle. Mountain shuttle services depart from Jeppesen Terminal's Ground Transportation level.
DEN–ONT Quick Facts
Frequently Asked Questions
Flights from DEN to ONT
Denver International Airport (DEN) and Ontario International Airport (ONT) are connected by nonstop service from Frontier, United Airlines and Southwest Airlines. With 90 weekly departures, this is a heavily served route.
DEN to ONT Flight Duration and Schedule
Nonstop flight time from DEN to ONT ranges from 2 hours 20 minutes to 2 hours 26 minutes. The route covers a distance of 818 miles (1,316 km). There are approximately 90 weekly flights outbound and 86 return, totaling 176 flights per week in both directions.
Connecting Options and Alternatives
58 one-stop connections are available, with the fastest taking approximately 3 hours via APA. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Colorado Springs (COS).