ORD → ONTChicago to Ontario

live

Direct flights from Chicago (ORD) to Ontario (ONT): 11 nonstop departures observed each week across 2 airlines. 57% of the last 7 operated flights arrived within 15 minutes of schedule. The median arrival is 14 minutes late. No cancellations were recorded across the 7 tracked flights. The nonstop covers 2,730 km, an estimated 4 hours 0 minutes in the air. Measured by Pro Flight Search from live flight boards at Chicago and Ontario. Updated 18 October 2026 at 12:37 UTC.

Today, ORD → ONT

Sun 18 Oct · local times
  1. 20:20 UA658United Airlines Sched 20:20Departure not confirmed by the board ·

Checked ORD board 07:37 · ONT board 22:18

ORD Chicago smooth · +0
ONT Ontario smooth · +3
2,730 km · ~4h 00m est.
dep bank 06:15–20:2011x weekly
Runs rough · 2 airlines · 11x weekly · nonstop
57% on time

of the last 7 operated ORD → ONT flights arrived within 15 minutes

Median arrival delay is +14 min. 0 of 7 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival+14 minacross the last 7 operated legs
Flight time~4h 00mestimated from route distance
Weekly departures11x2 direct airlines on the leg

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
United AirlinesUPS 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
United AirlinesUA

Flights UA658 20:20 daily

UPS Airlines5X

Flights 5X5609 06:15 Tu We Th Fr

History

operated legs · board outcomes
10-17UA658dep +34 → arr+10
10-165X5609departed+10
10-16UA658dep +52 → arr+9
10-155X5609departed+14
10-15UA658dep +31 → arr+22
10-145X5609departed+26
10-14UA658dep −5 → arr+26

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
ORDChicago +0 min smooth 🌤 few clouds · SSW 5 kt Full ORD delay board →
ONTOntario +3 min smooth 🌤 few clouds · N 0 kt Full ONT delay board →

Weather lens

Current conditions put the pressure at ORD and ONT: 44% odds of a 15+ minute delay and around +12 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the Chicago to Ontario route actually runs

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

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

ORD to ONT questions

Is ORD–ONT running on time right now?

Smooth skies ahead. The arrival side at ONT is the weaker end, route health score 96/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on ORD–ONT?

Operators schedule morning departures around 06:15 and evening departures around 20:20 from ORD. 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 ORD to ONT?

Great-circle distance is 2,730 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 223–264 min gate-to-gate on this route.

How often does ORD–ONT fly?

2 carriers operate this route, around 11 flights a week between them. Compare carrier days and times in the airline list above.