DEN → ONTDenver to Ontario

live

Direct flights from Denver (DEN) to Ontario (ONT): 21 nonstop departures observed each week across 3 airlines. 63% of the last 8 operated flights arrived within 15 minutes of schedule. The median arrival is 6 minutes late. No cancellations were recorded across the 8 tracked flights. The nonstop covers 1,316 km, an estimated 2 hours 11 minutes in the air. Measured by Pro Flight Search from live flight boards at Denver and Ontario. Updated 13 September 2026 at 14:38 UTC.

DEN Denver smooth · +0
ONT Ontario smooth · +0
1,316 km · ~2h 11m est.
dep bank 08:45–22:2921x weekly
Runs mixed · 3 airlines · 21x weekly · nonstop
63% on time

of the last 8 operated DEN → ONT flights arrived within 15 minutes

Median arrival delay is +6 min. 0 of 8 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival+6 minacross the last 8 operated legs
Flight time~2h 11mestimated from route distance
Weekly departures21x3 direct airlines on the leg

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Frontier AirlinesSouthwest AirlinesUnited Airlines

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
Frontier AirlinesF9

Flights F92907 08:45 daily · F91261 22:29 daily

Southwest AirlinesWN

Flights WN4794 varies Tu We Su · WN1596 varies Mo Tu We Th Fr Su · WN3265 09:05 Sa · WN2050 12:45 Mo Th Fr

United AirlinesUA

Flights UA430 11:30 daily

History

operated legs · board outcomes
09-12F91261dep +46 → arr+40
09-12F92907dep +40 → arr+21
09-12UA2028dep −3 → arr−15
09-12UA430dep +6 → arr+29
09-12WN3265dep +1 → arr−5
09-12WN3959dep +8 → arr−10
09-12WN4341dep +13 → arr−4
09-11F92907departed+6

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
DENDenver +0 min smooth 🌤 few clouds · SSW 9 kt Full DEN delay board →
ONTOntario +0 min smooth ⛅ overcast · N 0 kt Full ONT delay board →

Weather lens

Current conditions put the pressure at DEN: 37% odds of a 15+ minute delay and around +9 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the Denver to Ontario route actually runs

Pro Flight Search records official board updates for nonstop DEN to ONT flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.

Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — Denver (DEN) to Ontario (ONT) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/DEN-ONT
How we measure this →

DEN to ONT questions

Is DEN–ONT running on time right now?

Smooth skies ahead. Both endpoints currently score the same, route health score 100/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on DEN–ONT?

Operators schedule morning departures around 08:45 and evening departures around 17:50 from DEN. Earlier flights typically land before destination-airport delays accumulate later in the day; check the ONT delay card to confirm conditions when you'd arrive.

How long is the flight from DEN to ONT?

Great-circle distance is 1,316 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 123–143 min gate-to-gate on this route.

How often does DEN–ONT fly?

3 carriers operate this route, around 46 flights a week between them. Compare carrier days and times in the airline list above.