DEN → ONTDenver to Ontario

live

Direct flights from Denver (DEN) to Ontario (ONT): 49 nonstop departures observed each week across 3 airlines. 60% of the last 10 tracked flights arrived within 15 minutes of schedule. The median arrival is 6 minutes early. 2 of the 19 tracked flights were cancelled. 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 15 November 2026 at 13:00 UTC.

Today, DEN → ONT

Sun 15 Nov · local times
  1. 08:30 WN2263Southwest Airlines On scheduleGate C26 ·
  2. 09:10 F92907Frontier Airlines On scheduleGate A56 ·
  3. 11:15 UA430United Airlines On scheduleGate B15 ·
  4. 12:45 WN2484Southwest Airlines Cancelled ·
  5. 18:30 WN4740Southwest Airlines Est. 18:35Departure not confirmed by the board ·
  6. 19:25 UA2028United Airlines Sched 19:25Departure not confirmed by the board ·
  7. 21:20 WN2827Southwest Airlines Sched 21:20Departure not confirmed by the board ·
  8. 22:29 F91261Frontier Airlines Sched 22:29Departure not confirmed by the board ·

Checked DEN board 05:36 · ONT board 22:18

DEN Denver smooth · +3
ONT Ontario heavy · +43
1,316 km · ~2h 11m est.
dep bank 08:50–22:2949x weekly
Runs mixed · 3 airlines · 49x weekly · nonstop
60% on time

of the last 10 tracked DEN → ONT flights arrived within 15 minutes

Median arrival delay is −6 min. 2 of 19 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−6 minacross the last 8 arrivals
Flight time~2h 11mestimated from route distance
Weekly departures49x3 direct airlines on the leg
Cancelled10.5%recent route rate · 2 of 19

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 09:10 daily · F91261 22:29 daily

Southwest AirlinesWN

Flights WN2263 08:50 Tu We Su · WN2484 varies daily · WN4740 18:30 Mo Th Fr Sa Su · WN2827 21:20 Mo Tu We Th Fr Su

United AirlinesUA

Flights UA430 11:15 daily · UA2028 19:25 daily

History

operated legs · board outcomes
11-15WN2484cancelledCNX
11-14F91261departed−9
11-14F92907dep −10 → arr−29
11-14UA2028dep +11 → arr−18
11-14UA430dep +23 → arr+8
11-14WN2484dep +150 → arr+129
11-14WN4740departed+160
11-13F91261dep +39 → arr+30
11-13F92907dep −8 → arr−22
11-13UA430dep −2 → arr−14
11-13WN2484dep +16 → arr−6
11-13WN2827cancelledCNX
11-12F91261departed−10
11-12F92907departed−11
11-12UA2028departed+22
11-12UA430departed−4
11-12WN2484departed+4
11-12WN2827departed+21
11-12WN4740departed+63

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 +3 min smooth ⛅ overcast · N 4 kt Full DEN delay board →
ONTOntario +43 min heavy 🌤 few clouds · N 0 kt Full ONT delay board →

Weather lens

Conditions are tightest at DEN: a 50% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +23 min. Both figures come from the two airports' delay records in similar weather. 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?

Some delays possible. The arrival side at ONT is the weaker end, route health score 65/100. 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 08:50 and evening departures around 18:30 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 49 flights a week between them. Compare carrier days and times in the airline list above.