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 82% on time.

Nonstops (seasonal or thin)


United	ATW	DEN	3h 05m	82%	1.1%	364	Flying now
Allegiant	ATW	DEN	2h 31m	74%	0.0%	47	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	ATW 08:15 → ORD 09:45UA 4190 · flown by GoJet	1h 09m Chicago	ORD 10:54 → DEN 12:45UA 581	5h 30m	93%	90%
American Details →	ATW 05:00 → ORD 06:14AA 3763 · flown by Envoy	3h 46m Chicago	ORD 10:00 → DEN 11:44AA 1744	7h 44m	100%	83%
Delta Details →	ATW 05:31 → ATL 08:43DL 1436	3h 02m Atlanta	ATL 11:45 → DEN 12:59DL 706	8h 28m	96%	82%
Delta Details →	ATW 07:00 → DTW 09:25DL 4176 · flown by SkyWest	3h 17m Detroit	DTW 12:42 → DEN 13:54DL 1648	7h 54m	97%	81%
Delta Details →	ATW 06:00 → MSP 07:20DL 4995 · flown by Endeavor	3h 40m Minneapolis	MSP 11:00 → DEN 12:10DL 2927	7h 10m	94%	74%
United Details →	ATW 10:37 → ORD 11:59UA 4637 · flown by SkyWest	2h 34m Chicago	ORD 14:33 → DEN 16:31UA 2803	6h 54m	95%	70%
American Details →	ATW 06:00 → DFW 08:49AA 3673 · flown by Envoy	1h 52m Dallas-Fort Worth	DFW 10:41 → DEN 11:46AA 2359	6h 46m	97%	69%
United Details →	ATW 06:20 → ORD 07:51UA 4639 · flown by SkyWest	49m Chicago	ORD 08:40 → DEN 10:31UA 526	5h 11m	76%	68%
Tight connection: often missed
United Details →	ATW 10:37 → ORD 11:59UA 4637 · flown by SkyWest	57m Chicago	ORD 12:56 → DEN 14:46UA 1150	5h 09m	63%	53%
United Details →	ATW 17:29 → ORD 18:59UA 4633 · flown by SkyWest	1h 01m Chicago	ORD 20:00 → DEN 22:01UA 767	5h 32m	61%	40%
United Details →	ATW 15:44 → ORD 17:05UA 4391 · flown by GoJet	1h 12m Chicago	ORD 18:17 → DEN 20:22UA 1974	5h 38m	71%	38%

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

ORD · 1h 09m · leaves 08:15 7%

ATL · 1h 07m · leaves 05:31 15%

Afternoon and evening

DFW · 48m · leaves 12:39 23%

CLT · 1h 04m · leaves 14:03 23%

ORD · 1h 01m · leaves 17:29 39%

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 3763 ATW 05:00 → ORD United UA 526 ORD 08:40 → DEN Connection details →	2h 26m	6h 31m	96%	87%
Delta DL 1436 ATW 05:31 → ATL United UA 1327 ATL 11:10 → DEN Connection details →	2h 27m	7h 57m	93%	83%
Delta DL 4176 ATW 07:00 → DTW Frontier F9 3565 DTW 13:19 → DEN Connection details →	3h 54m	8h 35m	97%	81%

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