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

United Airlines and American Airlines fly the ONT to ORD nonstop about 10 times a week. That is enough service for a real choice of departures, though on a sector this short the premium cabin is a handful of seats and does not sit unclaimed for long. 2LNR tracks confirmed upgrade and award space on American Airlines, on every ONT to ORD 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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10
Nonstop flights a week
1,696 mi
Nonstop distance
Free
To get started

Ontario to Chicago flight schedule

Scheduled nonstop departures for ONT to ORD, 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 Ontario (ONT) to Chicago (ORD)
Date Flight Airline Departs ONT Arrives ORD Duration Aircraft
UA 1121United Airlines07:0013:104h 10m738
UA 1121United Airlines07:0013:104h 10m739
UA 1121United Airlines07:0013:104h 10m738
UA 1121United Airlines07:0013:104h 10m738
UA 1121United Airlines07:0013:104h 10m738
UA 1121United Airlines07:0013:104h 10m738
UA 1121United Airlines07:0013:104h 10m738

Showing all 7 scheduled ONT to ORD 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 ONT to ORD date on the interactive map

Confirmed upgrade & award space on ONT to ORD departures

2LNR tracks confirmed upgrade and award space on American Airlines, segment by segment and date by date. Open the calendar for Ontario to Chicago 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 ONT to ORD 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 ONT to ORD on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Ontario to Chicago nonstop

Carriers operating ONT to ORD nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

See ONT to ORD on the interactive map →

Frequently asked questions about ONT to ORD

How far is Chicago from Ontario?
ONT to ORD 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 ONT to ORD?
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 ONT to ORD?
About 10 nonstop flights a week run between Ontario and Chicago 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 ONT to ORD depart?
In the next 7 days with service, every scheduled ONT to ORD nonstop leaves at 07:00 local time at Ontario. The schedule table on this page lists each departure by date.
How do I check upgrade or award availability on ONT to ORD?
Open the ONT to ORD 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 ONT to ORD 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