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

Connect in the morning. The same one-hour layover misses 15% of the time at 9 am and 30% of the time at 4 pm.

Nonstops


American	CID	ORD	1h 25m	75%	4.5%	1,600	Flying now
United	CID	ORD	1h 26m	69%	3.6%	1,956	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.


United Details →	CID 05:30 → DEN 06:54UA 4716 · flown by SkyWest	1h 06m Denver	DEN 08:00 → ORD 11:44UA 2430	6h 14m	94%	83%
American Details →	CID 06:17 → CLT 09:35AA 1039	1h 26m Charlotte	CLT 11:01 → ORD 12:19AA 2908	6h 02m	91%	80%
American Details →	CID 05:17 → DFW 07:34AA 3473 · flown by Envoy	56m Dallas-Fort Worth	DFW 08:30 → ORD 11:10AA 1059	5h 53m	92%	74%
United Details →	CID 08:50 → DEN 10:04UA 1500	1h 11m Denver	DEN 11:15 → ORD 14:55UA 2865	6h 05m	87%	70%
United Details →	CID 15:16 → DEN 16:30UA 514	3h 10m Denver	DEN 19:40 → ORD 23:19UA 2085	8h 03m	96%	67%
Delta Details →	CID 05:45 → ATL 08:48DL 2518	2h 34m Atlanta	ATL 11:22 → ORD 12:36DL 2894	6h 51m	97%	66%
American Details →	CID 07:50 → PHX 09:16AA 4983 · flown by SkyWest	59m Phoenix	PHX 10:15 → ORD 16:12AA 2252	8h 22m	85%	65%
Delta Details →	CID 06:46 → MSP 08:05DL 5248 · flown by Endeavor	1h 55m Minneapolis	MSP 10:00 → ORD 11:32DL 1567	4h 45m	90%	63%
Tight connection: often missed
Frontier Details →	CID 15:01 → DEN 16:18F9 4385	47m Denver	DEN 17:05 → ORD 20:43F9 3174	5h 42m	70%	46%

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

DEN · 1h 06m · leaves 05:30 6%

DFW · 56m · leaves 05:17 8%

PHX · 59m · leaves 07:50 15%

Afternoon and evening

DEN · 47m · leaves 15:01 30%

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 3473 CID 05:17 → DFW United UA 1114 DFW 09:45 → ORD Connection details →	2h 11m	7h 09m	96%	88%
Delta DL 5248 CID 06:46 → MSP American AA 4162 MSP 10:31 → ORD Connection details →	2h 26m	5h 30m	89%	79%
Delta DL 2518 CID 05:45 → ATL United UA 1239 ATL 11:29 → ORD Connection details →	2h 41m	7h 07m	95%	77%

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