Flights Ontario → Chicago
ONT → MDW
Route overview
The flight route from Ontario to Chicago operates with a high level of punctuality, with 88% of flights arriving on time. Over the course of a year, there are 88 total flights along this route, each experiencing an average delay of just 4 minutes. The destination airport serves approximately 19,916,643 passengers annually, indicating its significance as a major travel hub.
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 Ontario (ONT) → Chicago (MDW) route is operated by Southwest Airlines. Across 119 flights monitored in recent months, 87% arrived on time (within 15 min of schedule), with an average delay of 6 minutes. The cancellation rate is 1.68%. FlightGuard's average computed risk is 11.2/100 (low), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At Chicago the average ATFM delay is 2.0 minutes (main cause: atfm). Departing from Ontario the average ATFM delay is 2.0 minutes.
Heading to Chicago: what to expect in this direction
Flying from Ontario (ONT) to Chicago (MDW) heads north-east for about 2,740 km, a flight time of roughly 3h 51m.
Departures from Ontario on this leg cluster in the overnight window: about 51% of ONT-MDW flights take off then.
Air-traffic congestion: departing Ontario the average ATFM delay is 2.0 min (airspace/NAS (BTS)); arriving into Chicago it is 2.0 min (atfm).
Across 119 tracked ONT-MDW flights, 87% left on time with an average delay of 6 min and a 1.7% 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) | 73% | 6 min | 3.1% |
Airlines operating ONT-MDW
Airports
Frequently asked questions about ONT-MDW
On the Ontario (ONT) -> Chicago (MDW) route, on-time performance is 87% with an average delay of 6 minutes, based on 119 tracked flights.
The cancellation rate on Ontario-Chicago is 1.68% across 119 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 Chicago, 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.
