ONT → DENOntario to Denver

live

Direct flights from Ontario (ONT) to Denver (DEN): 54 nonstop departures observed each week across 3 airlines. 90% of the last 31 tracked flights arrived within 15 minutes of schedule. The median arrival is 9 minutes early. No cancellations were recorded across the 31 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 Ontario and Denver. Updated 30 October 2026 at 15:09 UTC.

Today, ONT → DEN

Fri 30 Oct · local times
  1. 05:00 UA2446United Airlines Left 05:06 +6 Landed 08:01 −16
  2. 05:40 WN4115Southwest Airlines Left 05:42 Landed 08:39 −16
  3. 06:25 F91500Frontier Airlines Est. 06:25Departure not confirmed by the board DEN est. 09:18sched 09:46
  4. 08:05 WN3263Southwest Airlines On scheduleT4 DEN est. 11:08sched 11:15
  5. · F91262Frontier Airlines On schedule DEN 15:13scheduled
  6. · UA1263United Airlines On schedule DEN 16:45scheduled
  7. · WN3264Southwest Airlines On schedule DEN 18:00scheduled
  8. · WN3291Southwest Airlines On schedule DEN 15:50scheduled

Checked ONT board 06:18 · DEN board 08:44

ONT Ontario smooth · +13
DEN Denver smooth · +0
1,316 km · ~2h 11m est.
dep bank 05:00–17:4054x weekly
Runs reliable · 3 airlines · 54x weekly · nonstop
90% on time

of the last 31 tracked ONT → DEN flights arrived within 15 minutes

Median arrival delay is −9 min. 0 of 31 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−9 minacross the last 31 arrivals
Flight time~2h 11mestimated from route distance
Weekly departures54x3 direct airlines on the leg
Cancelled0.0%recent route rate · 0 of 31

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 AirlinesF9100% on time

Flights F91500 06:15 daily · F91262 11:52 Tu We Th Sa · F92908 11:52 Mo Th Fr Su

Southwest AirlinesWN79% on time

Flights WN4115 varies Mo Tu We Th Fr Su · WN3529 06:50 Sa · WN3263 08:05 Mo Tu We Th Fr · WN1782 08:55 Sa

United AirlinesUA100% on time

Flights UA2446 05:00 daily · UA1263 varies daily

History

operated legs · board outcomes
10-30UA2446dep +6 → arr−16
10-30WN4115dep +2 → arr−16
10-29F91262dep +24 → arr−3
10-29F91500dep +8 → arr−16
10-29UA1263dep +39 → arr+11
10-29UA2446dep +17 → arr−11
10-29WN3263dep +48 → arr+36
10-29WN3264dep +21 → arr+12
10-29WN3291dep +6 → arr−10
10-29WN4115dep +5 → arr−17
10-28F91262dep +15 → arr−14
10-28F91500dep +8 → arr−22
10-28UA1263dep +10 → arr+1
10-28UA2446dep +11 → arr−21
10-28WN3263dep +4 → arr−16
10-28WN4115dep +12 → arr−7
10-28WN956dep +11 → arr−9
10-27F91262dep +3 → arr−28
10-27F91500dep +0 → arr−14
10-27UA1263dep +8 → arr−14
10-27UA2446dep +5 → arr−9
10-27WN3263dep +25 → arr+8
10-27WN4115dep +19 → arr+6
10-27WN956dep +48 → arr+35
10-26F91500arrived+5
10-26F92908arrived−25
10-26UA1263arrived+11
10-26UA2446arrived−12
10-26WN3263arrived+0
10-26WN3264arrived+22
10-26WN3291arrived+0

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
ONTOntario +13 min smooth 🌤 overcast · NW 8 kt Full ONT delay board →
DENDenver +0 min smooth 🌫 clear · N 0 kt Full DEN delay board →

Weather lens

Conditions are tightest at DEN: a 47% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +13 min. Both figures come from the two airports' delay records in similar weather. See live delays → · Weather risk by airport →

How the Ontario to Denver route actually runs

Pro Flight Search records official board updates for nonstop ONT to DEN 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: Ontario (ONT) to Denver (DEN) route reliability, measured from operated flights on official airport boards.

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

ONT to DEN questions

Is ONT–DEN running on time right now?

Mostly on schedule. The departure side at ONT is the weaker end, route health score 71/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on ONT–DEN?

Operators schedule morning departures around 05:00 and evening departures around 17:40 from ONT. Earlier flights typically land before destination-airport delays accumulate later in the day; check the DEN delay card to confirm conditions when you'd arrive.

How long is the flight from ONT to DEN?

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 ONT–DEN fly?

3 carriers operate this route, around 54 flights a week between them. Compare carrier days and times in the airline list above.