--- title: "Chicago (ORD) to Ontario (ONT) flights: who flies it" description: "American Airlines and United Airlines fly nonstop from ORD to ONT, about 7 flights a week. See confirmed upgrade and award space by date on 2LNR, the next 14 days free." canonical: "https://2lnr.com/routes/ord-ont" url: "https://2lnr.com/routes/ord-ont.md" date_modified: "2026-10-18T05:10:47Z" --- # 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 October 18, 2026. Departure times come from 2LNR's schedule data; confirm with the airline before you book. Updated October 23, 2026. See ORD to ONT on the interactive map [Get started free](https://2lnr.com/login) 7 Flights a week, 4-week average 4h 29m to 4h 32m Scheduled flight time 1,696 mi Nonstop distance Free To get started ## 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. Scheduled nonstop departures from Chicago (ORD) to Ontario (ONT) | Date | Flight | Airline | Departs ORD | Arrives ONT | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Fri, Oct 23 | UA 658 | United Airlines | 20:20 | 22:49 | 4h 29m | [Boeing 737-800](https://2lnr.com/seatmaps/ua/737-800.md) | | Sat, Oct 24 | UA 658 | United Airlines | 20:20 | 22:49 | 4h 29m | Boeing 737-800 | | Sun, Oct 25 | UA 1904 | United Airlines | 16:00 | 18:29 | 4h 29m | [Airbus A320](https://2lnr.com/seatmaps/ua/a320.md) | | Mon, Oct 26 | UA 1904 | United Airlines | 16:00 | 18:29 | 4h 29m | Airbus A320 | | Tue, Oct 27 | UA 1904 | United Airlines | 16:15 | 18:47 | 4h 32m | Airbus A320 | | Wed, Oct 28 | UA 1904 | United Airlines | 16:15 | 18:47 | 4h 32m | Airbus A320 | | Thu, Oct 29 | 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. See every ORD to ONT date on the interactive map ## Aircraft on the Chicago to Ontario nonstop United Airlines flies the departures in the schedule table on this page with the [Airbus A320](https://2lnr.com/seatmaps/ua/a320.md) and the [Boeing 737-800](https://2lnr.com/seatmaps/ua/737-800.md). 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. ### Set an alert 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. - [United Airlines (UA) route map](https://2lnr.com/routes/airlines/ua.md)\ [The aircraft UA flies](https://2lnr.com/seatmaps/ua.md) - [American Airlines (AA) route map](https://2lnr.com/routes/airlines/aa.md)\ [The aircraft AA flies](https://2lnr.com/seatmaps/aa.md) See ORD to ONT on the interactive map → ## Frequently asked questions about ORD to ONT **How long is the flight from Chicago (ORD) to Ontario (ONT)?** Scheduled flight times from Chicago (ORD) to Ontario (ONT) run from 4h 29m to 4h 32m across the departures in the schedule table on this page. The nonstop covers about 1,696 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book. **Which airlines fly nonstop from ORD to ONT?** United Airlines and American Airlines fly ORD to ONT nonstop. 2LNR tracks confirmed upgrade and award space on American Airlines. **How many flights a week are there from ORD to ONT?** About 7 nonstop flights a week run between Chicago (ORD) and Ontario (ONT) 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 16:00 and 20:20, local time at Chicago. The schedule table on this page lists every departure by date, with its arrival time and aircraft. **Which flights operate ORD to ONT nonstop?** In the schedule table on this page, ORD to ONT nonstops fly as UA 658 and UA 1904 on United Airlines. The table lists each departure by date with its times 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. Flying the other way? See [ONT to ORD upgrade and award space](https://2lnr.com/routes/ont-ord.md). Award seats rather than schedules? See [American Airlines award availability](https://2lnr.com/awards/aa.md). Looking beyond this route? See [every route from Chicago (ORD)](https://2lnr.com/routes/ord.md), or [every route from Ontario (ONT)](https://2lnr.com/routes/ont.md). Nonstops from Chicago (ORD) to other airports within 150 miles of Ontario (ONT): - [Chicago (ORD) to Santa Ana (SNA)](https://2lnr.com/routes/ord-sna.md), 30 miles from ONT - [Chicago (ORD) to Los Angeles (LAX)](https://2lnr.com/routes/ord-lax.md), 48 miles from ONT - [Chicago (ORD) to Palm Springs (PSP)](https://2lnr.com/routes/ord-psp.md), 64 miles from ONT - [Chicago (ORD) to San Diego (SAN)](https://2lnr.com/routes/ord-san.md), 94 miles from ONT - [Chicago (ORD) to Santa Barbara (SBA)](https://2lnr.com/routes/ord-sba.md), 131 miles from ONT Distances are great-circle between the airports, not driving distance. - [How American upgrades clear](https://2lnr.com/about/aa/upgrades.md) - [How to read award availability by date](https://2lnr.com/guides/award-availability.md) ## Never miss ORD to ONT upgrade or award space See what's open by date on this route, the next 14 days free on every product and the full horizon on Pro. [Get started free](https://2lnr.com/login)