DEN → ONTDenver to Ontario

live

Direct flights from Denver (DEN) to Ontario (ONT): 21 nonstop departures observed each week across 3 airlines. 91% of the last 11 operated flights arrived within 15 minutes of schedule. The median arrival is 5 minutes early. No cancellations were recorded across the 11 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 22 October 2026 at 08:08 UTC.

Today, DEN → ONT

Thu 22 Oct · local times
  1. 08:30 WN3001Southwest Airlines On scheduleGate C39 ·
  2. 09:01 F92907Frontier Airlines On scheduleGate A78 ·
  3. 11:26 UA430United Airlines On scheduleGate B48 ·
  4. 13:00 WN2947Southwest Airlines Est. 13:05 +5Gate C41 ·
  5. 18:20 WN1827Southwest Airlines Sched 18:20Departure not confirmed by the board ·
  6. 19:35 UA2028United Airlines Sched 19:35Departure not confirmed by the board ·
  7. 20:55 WN1713Southwest Airlines Sched 20:55Departure not confirmed by the board ·
  8. 22:29 F91261Frontier Airlines Sched 22:29Departure not confirmed by the board ·

Checked DEN board 02:08 · ONT board 22:18

DEN Denver smooth · +0
ONT Ontario busy · +15
1,316 km · ~2h 11m est.
dep bank 08:30–22:2921x weekly
Runs reliable · 3 airlines · 21x weekly · nonstop
91% on time

of the last 11 operated DEN → ONT flights arrived within 15 minutes

Median arrival delay is −5 min. 0 of 11 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−5 minacross the last 11 operated legs
Flight time~2h 11mestimated from route distance
Weekly departures21x3 direct airlines on the leg
Cancelled0.0%recent route rate · 0 of 11

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 09:01 daily · F91261 22:29 daily

Southwest AirlinesWN

Flights WN3001 varies Mo Tu We Th Fr Su · WN2513 08:55 Sa · WN2592 12:40 Su · WN2947 13:00 Mo Th Fr

United AirlinesUA

Flights UA430 11:26 daily · UA2028 19:35 daily

History

operated legs · board outcomes
10-21F91261dep −3 → arr−5
10-21F92907dep −12 → arr−17
10-21UA2028dep −2 → arr+23
10-21UA430dep −4 → arr−6
10-21WN1713dep +16 → arr+9
10-21WN2346dep +3 → arr−3
10-21WN3001dep −4 → arr−13
10-20F91261departed−7
10-20F92907departed−5
10-20UA2028departed−1
10-20UA430departed−4

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 🌤 scattered clouds · SSW 16 kt Full DEN delay board →
ONTOntario +15 min busy 🌤 mostly cloudy · WSW 11 kt Full ONT delay board →

Weather lens

Current conditions put the pressure at DEN and ONT: 43% odds of a 15+ minute delay and around +10 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. The arrival side at ONT is the weaker end, route health score 90/100. 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 08:55 and evening departures around 18:20 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 53 flights a week between them. Compare carrier days and times in the airline list above.