Chicago to Ontario (ORD-ONT): nonstop upgrade & award space

United Airlines and American Airlines fly nonstop between Chicago (ORD) and Ontario (ONT), roughly 19 times a week. With United Airlines running most of the schedule, the shape of a week is predictable, which makes an open premium seat on a given date easy to spot and quick to lose. 2LNR tracks confirmed upgrade and award space on American Airlines, on every ORD to ONT departure, so you know which flights have space before you book.

Schedule last confirmed . Departure times come from 2LNR's schedule data; confirm with the airline before you book.

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19
Nonstop flights a week
1,696 mi
Nonstop distance
Free
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Chicago to Ontario flight schedule

Scheduled nonstop departures for ORD to ONT, last checked against our schedule feed on September 6, 2026. Airlines retime and cancel flights, so confirm with the airline before you book.

Schedule data dated .

Scheduled nonstop departures from Chicago (ORD) to Ontario (ONT)
Date Flight Airline Departs ORD Arrives ONT Duration Aircraft
UA 2141United Airlines17:3019:574h 27m738
UA 2800United Airlines20:0622:354h 29m738
UA 2299United Airlines20:3322:594h 26m7M9
UA 2141United Airlines17:3019:574h 27m738
UA 2800United Airlines20:0622:354h 29m738
UA 2299United Airlines20:3322:594h 26m738
UA 2800United Airlines20:0622:354h 29m738
UA 2299United Airlines20:3322:594h 26m738
UA 2800United Airlines20:0622:354h 29m738
UA 2299United Airlines20:3322:594h 26m738
UA 2141United Airlines17:3019:574h 27m738
UA 2800United Airlines20:0622:354h 29m738
UA 2299United Airlines20:3322:594h 26m738
UA 2800United Airlines20:0622:354h 29m738
UA 2299United Airlines20:3322:594h 26m738
UA 2800United Airlines20:0622:354h 29m738
UA 2299United Airlines20:3322:594h 26m738

Showing all 17 scheduled ORD to ONT departures across the next 7 days with service. 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 has not filed that value in the schedule data we hold. Aircraft are IATA equipment codes as filed, and can change up to departure.

See every ORD to ONT date on the interactive map

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 and award seats on each ORD to ONT departure, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are 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. 2LNR tracks confirmed upgrade and award space on each of them.

See ORD to ONT on the interactive map →

Frequently asked questions about ORD to ONT

How far is Ontario from Chicago?
ORD to ONT covers about 1,696 miles nonstop. Flight times vary by aircraft and season; the schedule table on this page lists each scheduled departure with its own times.
Which airlines fly nonstop from ORD to ONT?
United Airlines and American Airlines fly the route nonstop. 2LNR tracks confirmed upgrade and award space on American Airlines.
How many flights a week are there from ORD to ONT?
About 19 nonstop flights a week run between Chicago and Ontario in the current schedule, operated by United Airlines and American Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next.
What time do flights from ORD to ONT depart?
Scheduled ORD to ONT nonstops in the next 7 days with service leave between 17:30 and 20:33, local time at Chicago. The schedule table on this page lists every departure by date, with its arrival time and aircraft.
How do I check upgrade or award availability on ORD to ONT?
Open the ORD to ONT route on the interactive map or the matrix to see confirmed upgrade and award space by date on American Airlines, the next 14 days free and the full horizon on Pro. On Pro you can also set an alert on the route and 2LNR notifies you when space opens.

Never miss ORD to ONT upgrade or award space

See what is open by date on this route, the next 14 days free on every product and the full horizon on Pro.

Get started free