ONT → MDWOntario to Chicago

live

Direct flights from Ontario (ONT) to Chicago (MDW): 7 nonstop departures observed each week across 1 airline. 88% of the last 8 operated flights arrived within 15 minutes of schedule. The median arrival is 8 minutes early. No cancellations were recorded across the 8 tracked flights. The nonstop covers 2,740 km, an estimated 4 hours 1 minutes in the air. Measured by Pro Flight Search from live flight boards at Ontario and Chicago. Updated 11 September 2026 at 13:18 UTC.

ONT Ontario smooth · +14
MDW Chicago smooth · +0
2,740 km · ~4h 01m est.
departs 23:557x weekly
Runs reliable · 1 airline · 7x weekly · nonstop
88% on time

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

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

Median arrival−8 minacross the last 8 operated legs
Flight time~4h 01mestimated from route distance
Weekly departures7x1 direct airline on the leg

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Southwest 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
Southwest AirlinesWN88% on time

Flights WN3082 23:55 daily

History

operated legs · board outcomes
09-10WN3082dep +13 → arr−7
09-09WN3082dep +23 → arr−8
09-08WN3082dep +32 → arr+10
09-07WN3082dep +19 → arr−11
09-06WN3082dep +7 → arr−24
09-05WN3082dep +48 → arr+24
09-04WN3082dep +14 → arr−18
09-03WN3082arrived−18

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 +14 min smooth 🌤 few clouds · N 0 kt Full ONT delay board →
MDWChicago +0 min smooth 🌤 few clouds · SSE 5 kt Full MDW delay board →

Weather lens

Current conditions put the pressure at ONT and MDW: 43% odds of a 15+ minute delay and around +11 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the Ontario to Chicago route actually runs

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

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

ONT to MDW questions

Is ONT–MDW running on time right now?

Smooth skies ahead. The departure side at ONT is the weaker end, route health score 91/100. The airports section above carries the live status and delay window at both ends.

How long is the flight from ONT to MDW?

Great-circle distance is 2,740 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 223–265 min gate-to-gate on this route.

How often does ONT–MDW fly?

Southwest Airlines runs the route with about 7 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.

What does the route health score measure?

A blend of departure-side delay at ONT and arrival-side delay at MDW, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.