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 3 in 4 on time.

Nonstops


American	COU	ORD	1h 33m	78%	2.9%	1,137	Flying now
United	COU	ORD	1h 36m	71%	4.7%	876	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Chicago on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


American Details →	COU 07:20 → CLT 10:25AA 4006 · flown by Envoy	2h 40m Charlotte	CLT 13:05 → ORD 14:20AA 836	7h 00m	99%	68%
United Details →	COU 09:14 → DEN 10:35UA 5857 · flown by SkyWest	2h 50m Denver	DEN 13:25 → ORD 17:05UA 617	7h 51m	97%	65%
American Details →	COU 06:55 → DFW 08:50AA 3525 · flown by Envoy	1h 55m Dallas-Fort Worth	DFW 10:45 → ORD 13:25AA 3330	6h 30m	95%	59%
American Details →	COU 11:45 → DFW 13:38AA 3478 · flown by Envoy	3h 12m Dallas-Fort Worth	DFW 16:50 → ORD 19:44AA 2474	7h 59m	94%	50%
American Details →	COU 17:19 → DFW 19:14AA 3481 · flown by Envoy	1h 46m Dallas-Fort Worth	DFW 21:00 → ORD 23:39AA 2346	6h 20m	85%	48%
Tight connection: often missed
American Details →	COU 19:26 → DFW 21:20AA 3890 · flown by Envoy	52m Dallas-Fort Worth	DFW 22:12 → ORD 00:50 +1AA 1193	5h 24m	65%	32%

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.

Afternoon and evening

DFW · 52m · leaves 19:26 35%

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.


American AA 4006 COU 07:20 → CLT United UA 3442 CLT 13:06 → ORD Connection details →	2h 41m	7h 10m	99%	73%
American AA 3525 COU 06:55 → DFW United UA 1401 DFW 12:00 → ORD Connection details →	3h 10m	7h 47m	97%	69%
United UA 5857 COU 09:14 → DEN American AA 1744 DEN 12:34 → ORD Connection details →	1h 59m	7h 17m	92%	68%

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