MDW → ONTChicago to Ontario

live

Direct flights from Chicago (MDW) to Ontario (ONT): 7 nonstop departures observed each week across 1 airline. 100% of the last 7 operated flights arrived within 15 minutes of schedule. The median arrival is on schedule. No cancellations were recorded across the 7 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 Chicago and Ontario. Updated 12 September 2026 at 07:39 UTC.

MDW Chicago disrupted · +68
ONT Ontario smooth · +0
2,740 km · ~4h 01m est.
dep bank 14:00–20:307x weekly
Runs reliable · 1 airline · 7x weekly · nonstop
100% on time

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

Median arrival delay is −1 min. 0 of 7 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−1 minacross the last 7 operated legs
Flight time~4h 01mestimated from route distance
Weekly departures7x1 direct airline on the leg

Who flies it

observed on the boards · 7 days
Southwest AirlinesWN100% on time

Flights WN2784 varies Mo Tu We Th Fr Sa · WN1347 varies Su

History

operated legs · board outcomes
09-11WN2784dep +15 → arr−1
09-10WN2784dep +39 → arr+15
09-09WN2784dep +11 → arr−7
09-08WN2784dep +17 → arr−1
09-07WN2784dep +13 → arr−7
09-06WN1347dep +9 → arr+6
09-05WN2784dep +12 → arr+1

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
MDWChicago +68 min disrupted 🌤 clear · S 4 kt Full MDW delay board →
ONTOntario +0 min smooth 🌤 clear · WSW 5 kt Full ONT delay board →

Weather lens

Current conditions put the pressure at MDW and ONT: 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 Chicago to Ontario route actually runs

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

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

MDW to ONT questions

Is MDW–ONT running on time right now?

Some delays possible. The departure side at MDW is the weaker end, route health score 55/100. The airports section above carries the live status and delay window at both ends.

How long is the flight from MDW to ONT?

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 MDW–ONT 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 MDW and arrival-side delay at ONT, 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.