Denver to Ontario (DEN–ONT) — Airlines, Schedules & Connections
No flights match your filters.
No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.
Most recently operated nonstop flights — the month shown is when each was last scheduled. Most destinations remain reachable with a connection.
No discontinued nonstop flights on record for this route.
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, 1-stop connecting options are also available.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| WN Southwest Airlines | 52 | 737, 738, 73H, 7M8, 7S7, B38M | 2h15-2h30 | – | – | |
| UA United Airlines Also: AC | 15 | 738, 7M9 | 2h20-2h23 | Star Alliance | AC | |
| F9 Frontier Also: Y4 | 14 | 32N, 32Q | 2h19-2h24 | – | Y4 |
Weekly Schedule Pattern
Connection Landscape
On-Time Performance
Other ways to reach Ontario from Denver
| Metric | DEN→ONT | COS→ONT |
|---|---|---|
| Distance from DEN | – | 73 mi |
| Nonstop airlines | 3 | 1 |
| Weekly flights | 109 | – |
| Flight time | 2h 20m | 1h 52m |
| Departure OTP | 60% | – |
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 Southwest Airlines, United Airlines and Frontier. With 109 weekly departures, this is a heavily served route.
DEN to ONT Flight Duration and Schedule
Nonstop flight time from DEN to ONT is about 2 hours 20 minutes gate to gate. The route covers a distance of 818 miles (1,316 km). There are approximately 109 weekly flights outbound and 114 return, totaling 223 flights per week in both directions.
Connecting Options and Alternatives
1-stop connecting options are also available, commonly via Harry Reid, Phoenix Sky Harbor and Salt Lake City. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Colorado Springs (COS).