--- title: "Chicago to Chattanooga flights: who flies ORD-CHA" description: "American Airlines and United Airlines fly nonstop from ORD to CHA, about 40 flights a week. See confirmed upgrade and award space by date on 2LNR, the next 14 days free." canonical: "https://2lnr.com/routes/ord-cha" url: "https://2lnr.com/routes/ord-cha.md" date_modified: "2026-10-18T05:10:47Z" --- # Chicago to Chattanooga (ORD-CHA): nonstop upgrade & award space United Airlines and American Airlines fly nonstop between Chicago (ORD) and Chattanooga (CHA), roughly 40 times a week. The timetable below shows the nonstop scheduled at 1h 46m to 1h 59m for the 502 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 CHA on the interactive map [Get started free](https://2lnr.com/login) 40 Flights a week, 4-week average 1h 46m to 1h 59m Scheduled flight time 502 mi Nonstop distance Free To get started ## Chicago to Chattanooga flight schedule Scheduled nonstop departures for ORD to CHA starting October 22, 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 Chattanooga (CHA) | Date | Flight | Airline | Departs ORD | Arrives CHA | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Thu, Oct 22 | UA 5437 | United Airlines | 06:50 | 09:42 | 1h 52m | CR5 | | Thu, Oct 22 | UA 4397 | United Airlines | 10:30 | 13:16 | 1h 46m | CR5 | | Thu, Oct 22 | UA 4536 | United Airlines | 15:40 | 18:32 | 1h 52m | CR5 | | Thu, Oct 22 | AA 4511 | American Airlines | 18:30 | 21:25 | 1h 55m | [Embraer E175](https://2lnr.com/seatmaps/aa/e175.md) | | Thu, Oct 22 | AA 3851 | American Airlines | 21:05 | 23:56 | 1h 51m | [Embraer E170](https://2lnr.com/seatmaps/aa/e170.md) | | Thu, Oct 22 | UA 4523 | United Airlines | 21:20 | 00:10 | 1h 50m | CR5 | | Fri, Oct 23 | UA 5437 | United Airlines | 06:50 | 09:42 | 1h 52m | CR5 | | Fri, Oct 23 | UA 4397 | United Airlines | 10:30 | 13:16 | 1h 46m | CR5 | | Fri, Oct 23 | UA 4536 | United Airlines | 15:40 | 18:32 | 1h 52m | CR5 | | Fri, Oct 23 | AA 4511 | American Airlines | 18:30 | 21:25 | 1h 55m | Embraer E175 | | Fri, Oct 23 | AA 3851 | American Airlines | 21:05 | 23:56 | 1h 51m | Embraer E170 | | Fri, Oct 23 | UA 4523 | United Airlines | 21:20 | 00:10 | 1h 50m | CR5 | | Sat, Oct 24 | UA 5437 | United Airlines | 06:50 | 09:42 | 1h 52m | CR5 | | Sat, Oct 24 | UA 4397 | United Airlines | 10:30 | 13:16 | 1h 46m | CR5 | | Sat, Oct 24 | UA 4536 | United Airlines | 15:40 | 18:32 | 1h 52m | CR5 | | Sat, Oct 24 | AA 4511 | American Airlines | 18:30 | 21:25 | 1h 55m | Embraer E175 | | Sat, Oct 24 | AA 3851 | American Airlines | 21:00 | 23:51 | 1h 51m | Embraer E170 | | Sat, Oct 24 | UA 5711 | United Airlines | 21:20 | 00:13 | 1h 53m | [Embraer E175](https://2lnr.com/seatmaps/ua/e175.md) | | Sun, Oct 25 | UA 5687 | United Airlines | 10:25 | 13:16 | 1h 51m | CR5 | | Sun, Oct 25 | UA 4502 | United Airlines | 14:33 | 17:25 | 1h 52m | CR5 | | Sun, Oct 25 | UA 4507 | United Airlines | 17:50 | 20:49 | 1h 59m | CR5 | | Sun, Oct 25 | UA 5659 | United Airlines | 17:59 | 20:52 | 1h 53m | Embraer E175 | | Sun, Oct 25 | AA 3851 | American Airlines | 21:05 | 23:56 | 1h 51m | Embraer E170 | | Mon, Oct 26 | UA 5687 | United Airlines | 10:25 | 13:16 | 1h 51m | CR5 | | Mon, Oct 26 | UA 5760 | United Airlines | 14:16 | 17:10 | 1h 54m | Embraer E175 | | Mon, Oct 26 | UA 4507 | United Airlines | 17:50 | 20:49 | 1h 59m | CR5 | | Mon, Oct 26 | UA 5659 | United Airlines | 17:59 | 20:52 | 1h 53m | Embraer E175 | | Mon, Oct 26 | AA 3851 | American Airlines | 21:05 | 23:56 | 1h 51m | Embraer E170 | | Tue, Oct 27 | UA 5687 | United Airlines | 10:25 | 13:14 | 1h 49m | CR5 | | Tue, Oct 27 | UA 5760 | United Airlines | 14:16 | 17:10 | 1h 54m | Embraer E175 | | Tue, Oct 27 | UA 4507 | United Airlines | 17:50 | 20:49 | 1h 59m | CR5 | | Tue, Oct 27 | UA 5659 | United Airlines | 17:59 | 20:52 | 1h 53m | Embraer E175 | | Tue, Oct 27 | AA 3851 | American Airlines | 20:59 | 23:50 | 1h 51m | Embraer E170 | | Wed, Oct 28 | UA 5687 | United Airlines | 10:25 | 13:14 | 1h 49m | CR5 | | Wed, Oct 28 | UA 5760 | United Airlines | 14:16 | 17:08 | 1h 52m | CR5 | | Wed, Oct 28 | UA 4507 | United Airlines | 17:50 | 20:49 | 1h 59m | CR5 | | Wed, Oct 28 | UA 5659 | United Airlines | 17:59 | 20:52 | 1h 53m | Embraer E175 | | Wed, Oct 28 | AA 4511 | American Airlines | 18:30 | 21:25 | 1h 55m | Embraer E175 | | Wed, Oct 28 | AA 3851 | American Airlines | 21:05 | 23:56 | 1h 51m | Embraer E170 | Showing all 39 scheduled ORD to CHA departures across 7 days with service, starting October 22, 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 CHA date on the interactive map ## Aircraft on the Chicago to Chattanooga nonstop In the schedule table on this page, United Airlines flies the Bombardier CRJ and the [Embraer E175](https://2lnr.com/seatmaps/ua/e175.md), and American Airlines flies the [Embraer E170](https://2lnr.com/seatmaps/aa/e170.md) and the [Embraer E175](https://2lnr.com/seatmaps/aa/e175.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 CHA departures 2LNR tracks confirmed upgrade and award space on American Airlines, segment by segment and date by date. Open the calendar for Chicago to Chattanooga to see which departures have space, the next 14 days free on every product and the full horizon on Pro. American Airlines award space was open on 10 of the 14 Chicago to Chattanooga departure dates from October 19 to November 1 that 2LNR checked in the 7 days to October 19, 2026. ### See real availability Confirmed upgrade or award seats by date on the ORD to CHA 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 CHA on the interactive route map, with schedules, connections, and route statistics. ## Airlines flying Chicago to Chattanooga nonstop Carriers operating ORD to CHA 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 CHA on the interactive map → ## Frequently asked questions about ORD to CHA **How long is the flight from Chicago (ORD) to Chattanooga (CHA)?** Scheduled flight times from Chicago (ORD) to Chattanooga (CHA) run from 1h 46m to 1h 59m across the departures in the schedule table on this page. The nonstop covers about 502 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book. **Which airlines fly nonstop from ORD to CHA?** United Airlines and American Airlines fly ORD to CHA nonstop. 2LNR tracks confirmed upgrade and award space on American Airlines. **How many flights a week are there from ORD to CHA?** About 40 nonstop flights a week run between Chicago (ORD) and Chattanooga (CHA) 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 CHA depart?** Scheduled ORD to CHA nonstops in the next 7 days with service leave between 06:50 and 21:20, 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 CHA nonstop?** The schedule table on this page lists 12 flight numbers for ORD to CHA nonstops, including UA 4397, UA 4507, UA 4536, UA 5437, UA 5659, and UA 5687 on United Airlines, and AA 3851 and AA 4511 on American Airlines. The table lists each departure by date with its times and aircraft. **How do I check upgrade or award availability on ORD to CHA?** Open the ORD to CHA 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 [CHA to ORD upgrade and award space](https://2lnr.com/routes/cha-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 Chattanooga (CHA)](https://2lnr.com/routes/cha.md). Nonstops from Chicago (ORD) to other airports within 150 miles of Chattanooga (CHA): - [Chicago (ORD) to Knoxville (TYS)](https://2lnr.com/routes/ord-tys.md), 86 miles from CHA - [Chicago (ORD) to Huntsville (HSV)](https://2lnr.com/routes/ord-hsv.md), 93 miles from CHA - [Chicago (ORD) to Atlanta (ATL)](https://2lnr.com/routes/ord-atl.md), 106 miles from CHA - [Chicago (ORD) to Nashville (BNA)](https://2lnr.com/routes/ord-bna.md), 112 miles from CHA - [Chicago (ORD) to Birmingham (BHM)](https://2lnr.com/routes/ord-bhm.md), 135 miles from CHA 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 CHA 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)