Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No clear winner: airlines and hours on this route all land within a few points of 7 in 10 on time.

Nonstops


United	ORD	CHA	1h 51m	72%	3.7%	1,403	Flying now
American	ORD	CHA	1h 50m	71%	4.5%	404	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Chattanooga on time. Total trip = scheduled departure to arrival, layover included (Chattanooga is 1 h ahead of Chicago). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	ORD 05:30 → ATL 08:33DL 1264	3h 00m Atlanta	ATL 11:33 → CHA 12:23DL 1737	5h 53m	98%	86%
Delta Details →	ORD 06:35 → ATL 09:41DL 1247	3h 33m Atlanta	ATL 13:14 → CHA 14:05DL 3141	6h 30m	98%	82%
American Details →	ORD 05:00 → DFW 07:30AA 760	1h 10m Dallas-Fort Worth	DFW 08:40 → CHA 11:47AA 3451 · flown by Envoy	5h 47m	93%	81%
American Details →	ORD 05:07 → CLT 08:10AA 2842	3h 15m Charlotte	CLT 11:25 → CHA 12:54AA 6127 · flown by Piedmont	6h 47m	98%	78%
American Details →	ORD 13:17 → CLT 16:29AA 3280	3h 55m Charlotte	CLT 20:24 → CHA 21:52AA 5787 · flown by Piedmont	7h 35m	100%	78%
Delta Details →	ORD 14:07 → DTW 16:40DL 1716	3h 30m Detroit	DTW 20:10 → CHA 22:02DL 4894 · flown by Endeavor	6h 55m	95%	72%
American Details →	ORD 08:00 → CLT 11:08AA 3222	3h 32m Charlotte	CLT 14:40 → CHA 16:08AA 6051 · flown by Piedmont	7h 08m	97%	71%
Delta Details →	ORD 07:01 → DTW 09:30DL 2039	2h 55m Detroit	DTW 12:25 → CHA 14:14DL 5117 · flown by Endeavor	6h 13m	96%	70%
Tight connection: often missed
Delta Details →	ORD 18:22 → ATL 21:38DL 2740	1h 22m Atlanta	ATL 23:00 → CHA 23:55DL 1059	4h 34m	74%	40%
American Details →	ORD 16:51 → DFW 19:28AA 2988	1h 45m Dallas-Fort Worth	DFW 21:13 → CHA 00:18 +1AA 426	6h 27m	71%	26%

Same layover, different day-part

How often the first flight arrives too late to connect (45 min minimum), for one-ticket layovers of 45–80 minutes.

Morning

DFW · 1h 10m · leaves 05:00 7%

IAH · 59m · leaves 08:51 20%

DTW · 1h 02m · leaves 08:52 24%

Afternoon and evening

ATL · 1h 09m · leaves 15:22 21%

Delays build through the day, so an afternoon first leg eats the layover. A short connection is fine early in the morning and a gamble later on.

Mixing airlines

One ticketMiss it and the airline rebooks you; bags go through. 45 min is enough.

Separate ticketsMiss it and you buy a new ticket. Re-check bags, clear security again: we require 90 min.


United UA 425 ORD 07:12 → ATL Delta DL 3141 ATL 13:14 → CHA Connection details →	2h 47m	5h 53m	100%	85%
United UA 1344 ORD 07:20 → DTW Delta DL 5117 DTW 12:25 → CHA Connection details →	2h 33m	5h 54m	100%	75%
United UA 5757 ORD 14:30 → CLT American AA 5787 CLT 20:24 → CHA Connection details →	2h 25m	6h 22m	95%	72%

Rank all connections, any airlines →

Regional partners count as the airline that sells them: SkyWest flying Delta Connection is one Delta ticket.

How these are worked out. Makes the connection: share of the last year’s flights where the first flight arrived with at least 45 minutes to spare (90 on separate tickets). Arrives on time: first flight not cancelled × connection made × second flight not cancelled and arriving within 15 minutes. Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON