OntariotoDenverFlight Time
ONT–DEN · Nonstop
Ontario (Ontario International Airport) to Denver (Denver International Airport).
The estimated flight time from Ontario (ONT) to Denver (DEN) is about 2h 16m, covering 818 miles. Southwest Airlines, United Airlines, and Frontier Airlines fly the route nonstop with 8-9/day departures, from 05:00 to 18:30 local time.
Plan this routeAt a glance
| Est. flight time | Distance | Route type | Captured freq. | Market |
|---|---|---|---|---|
| ~2h 16m Estimated from great-circle distance — no tracked flights yet. | 818 mi | Nonstop | 8-9/day From the current provider sample; confirm live timetables before booking. | Domestic |
Airlines on this route
Nonstop airlines from Ontario to Denver
Southwest Airlines, United Airlines, and Frontier Airlines operate 8-9/day flights from ONT to DEN. Departures leave from Terminals 4 and 2 at ONT.
- First departure
- 05:00
- Last departure
- 18:30
- Cadence
- ~hourly
- Scheduled departure times
- 19
| Airline | Captured daily freq. | Aircraft | Departures (local) |
|---|---|---|---|
| Southwest Airlines | 3-4/day | Boeing 737 · Terminal 4 · Seat map | 05:45 |
Aircraft on this route
Flying the other way?
DEN to ONT flights — 8-9/day on 3 airlines →Methodology: airline, aircraft, terminal, and departure-time details come from a full week of published airline schedules for ONT, refreshed on a rolling basis. Frequency uses 59 scheduled departures across 7 observed days; flight time is estimated from flying distance until this route has enough tracked flights for an observed average.
Route FAQ
How long is the flight from Ontario to Denver?
The estimated flight time from Ontario (ONT) to Denver (DEN) is about 2h 16m, based on the 818-mile flying distance.
How far is Ontario from Denver?
Ontario (ONT) to Denver (DEN) is about 818 miles by air.
Are there nonstop flights from Ontario to Denver?
Yes. Southwest Airlines, United Airlines, and Frontier Airlines fly nonstop from Ontario (ONT) to Denver (DEN), with 8-9/day departures.
Which airlines fly from Ontario to Denver?
Southwest Airlines, United Airlines, and Frontier Airlines fly nonstop from Ontario (ONT) to Denver (DEN).
What aircraft fly from Ontario to Denver?
The ONT–DEN route is flown with Airbus A320 family, Boeing 737.
Route hubs
Nearby airport options
Near Ontario
- SNA - Santa AnaJohn Wayne/Orange County Airport · 30 mi from ONTFlights from SNA
- BUR - BurbankBob Hope Airport · 44 mi from ONTFlights from BUR
- LAX - Los AngelesLos Angeles International Airport · 47 mi from ONTFlights from LAX