Chicago to Ontario (ORD-ONT): nonstop upgrade & award space
United Airlines and American Airlines fly the ORD to ONT nonstop about 7 times a week. The timetable below shows the nonstop scheduled at 4h 29m to 4h 32m for the 1,696 miles. 2LNR checks confirmed upgrade and award space on American Airlines flights on this route, so you can see which departures have space before you book.
Schedule last confirmed . Departure times come from 2LNR's schedule data; confirm with the airline before you book.
Updated .
Chicago to Ontario flight schedule
Scheduled nonstop departures for ORD to ONT starting October 23, 2026, last checked against our schedule feed on October 18, 2026. Airlines retime and cancel flights, so confirm with the airline before you book.
Schedule data dated .
| Date | Flight | Airline | Departs ORD | Arrives ONT | Duration | Aircraft |
|---|---|---|---|---|---|---|
| UA 658 | United Airlines | 20:20 | 22:49 | 4h 29m | Boeing 737-800 | |
| UA 658 | United Airlines | 20:20 | 22:49 | 4h 29m | Boeing 737-800 | |
| UA 1904 | United Airlines | 16:00 | 18:29 | 4h 29m | Airbus A320 | |
| UA 1904 | United Airlines | 16:00 | 18:29 | 4h 29m | Airbus A320 | |
| UA 1904 | United Airlines | 16:15 | 18:47 | 4h 32m | Airbus A320 | |
| UA 1904 | United Airlines | 16:15 | 18:47 | 4h 32m | Airbus A320 | |
| UA 1904 | United Airlines | 16:15 | 18:47 | 4h 32m | Airbus A320 |
Showing all 7 scheduled ORD to ONT departures across 7 days with service, starting October 23, 2026. Later dates are on the interactive map.
Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline hasn't filed that value in the schedule data we hold. Aircraft are the equipment the airline filed, named where the code pins down one type and shown as the family or the bare code where it doesn't. Swaps can happen up to departure.
Aircraft on the Chicago to Ontario nonstop
United Airlines flies the departures in the schedule table on this page with the Airbus A320 and the Boeing 737-800. Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure.
Confirmed upgrade & award space on ORD to ONT departures
2LNR tracks confirmed upgrade and award space on American Airlines, segment by segment and date by date. Open the calendar for Chicago to Ontario to see which departures have space, the next 14 days free on every product and the full horizon on Pro.
See real availability
Confirmed upgrade or award seats by date on the ORD to ONT departures 2LNR tracks, checked against live inventory so you know what's open before you book.
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Premium inventory turns over fast. Watch this route on Pro and 2LNR notifies you when space appears on a date you're tracking.
Plan on the map
See ORD to ONT on the interactive route map, with schedules, connections, and route statistics.
Airlines flying Chicago to Ontario nonstop
Carriers operating ORD to ONT nonstop in the current schedule. Where 2LNR tracks the carrier, its departures show confirmed upgrade or award space by date.
Frequently asked questions about ORD to ONT
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