Flights Chicago → Ontario
MDW → ONT
How long is the flight from Chicago to Ontario?
The flight from Chicago (MDW) to Ontario (ONT) takes 3h 56m on average. That is the median time recorded across 1 scheduled flight on this leg; the actual time varies by a few minutes with wind, routing and take-off queues.
Route overview
The flight route from Chicago to Ontario has a 79% on-time performance rate, with an average delay of 11.4 minutes when flights are not on time. Over the course of a year, this route sees 88 total flights, connecting to a destination airport that serves approximately 5,740,593 passengers annually.
Your rights on this US flight (DOT)
US flights have no statutory cash compensation for delays. Under the US DOT rules, if your flight is cancelled or significantly changed and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Amenities for controllable delays depend on each airline's contract of carriage.
US flight refund rules & checker →General information, not legal advice.
The Chicago (MDW) → Ontario (ONT) route is operated by Southwest Airlines. Across 225 flights monitored in recent months, 64% arrived on time (within 15 min of schedule), with an average delay of 19 minutes. The cancellation rate is 2.67%. FlightGuard's average computed risk is 25.6/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At Ontario the average ATFM delay is 5.5 minutes (main cause: atfm). Departing from Chicago the average ATFM delay is 5.5 minutes.
Heading to Ontario: what to expect in this direction
Flying from Chicago (MDW) to Ontario (ONT) heads west for about 2,740 km, a flight time of roughly 3h 56m.
Departures from Chicago on this leg cluster in the morning window: about 52% of MDW-ONT flights take off then.
Air-traffic congestion: departing Chicago the average ATFM delay is 5.5 min (atfm); arriving into Ontario it is 5.5 min (atfm).
Across 225 tracked MDW-ONT flights, 64% left on time with an average delay of 19 min and a 2.7% cancellation rate.
Route facts
Flights on this route
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Airline punctuality on this route
| Airline | On-time | Average delay | Cancellations |
|---|---|---|---|
| Southwest Airlines (WN) | 75% | 5 min | 0.3% |
Airlines operating MDW-ONT
Airports
Frequently asked questions about MDW-ONT
The flight from Chicago (MDW) to Ontario (ONT) takes 3h 56m on average. That is the median time recorded across 1 scheduled flight on this leg; the actual time varies by a few minutes with wind, routing and take-off queues.
On the Chicago (MDW) -> Ontario (ONT) route, on-time performance is 64% with an average delay of 19 minutes, based on 225 tracked flights.
The cancellation rate on Chicago-Ontario is 2.67% across 225 monitored flights.
The route is operated by 1 airline: Southwest Airlines.
Enter your flight number on FlightGuard for a real-time analysis based on 9 factors: weather at Ontario, ATC delays, strikes, NOTAMs, fuel, airline punctuality and recent trends.
US flights have no statutory cash compensation for delays. Under US DOT rules, if the airline cancels or significantly changes your flight and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Meals or hotels for controllable delays depend on each airline's contract of carriage.
