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 62% on time.

Nonstops


United	ORD	ASE	3h 23m	68%	2.5%	715	Flying now
American	ORD	ASE	3h 28m	51%	3.8%	419	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	ORD 05:00 → DEN 06:42UA 2666	1h 03m Denver	DEN 07:45 → ASE 08:46UA 5444 · flown by SkyWest	4h 46m	99%	82%
American Details →	ORD 05:00 → DFW 07:30AA 760	3h 20m Dallas-Fort Worth	DFW 10:50 → ASE 12:21AA 4912 · flown by SkyWest	8h 21m	99%	77%
United Details →	ORD 06:00 → DEN 07:42UA 2806	2h 08m Denver	DEN 09:50 → ASE 10:51UA 5782 · flown by SkyWest	5h 51m	100%	77%
United Details →	ORD 06:00 → LAX 08:27UA 2373	1h 50m Los Angeles	LAX 10:17 → ASE 13:38UA 4700 · flown by SkyWest	8h 38m	96%	77%
United Details →	ORD 10:25 → IAH 13:23UA 2638	3h 32m Houston	IAH 16:55 → ASE 18:45UA 5917 · flown by SkyWest	9h 20m	100%	75%
United Details →	ORD 05:30 → IAH 08:18UA 2310	1h 32m Houston	IAH 09:50 → ASE 11:40UA 5814 · flown by SkyWest	7h 10m	99%	71%
United Details →	ORD 07:05 → DEN 08:55UA 1217	2h 23m Denver	DEN 11:18 → ASE 12:26UA 5769 · flown by SkyWest	6h 21m	98%	70%
United Details →	ORD 10:54 → DEN 12:45UA 581	2h 22m Denver	DEN 15:07 → ASE 16:08UA 5773 · flown by SkyWest	6h 14m	97%	70%
Tight connection: often missed
United Details →	ORD 14:33 → DEN 16:31UA 2803	54m Denver	DEN 17:25 → ASE 18:29UA 5775 · flown by SkyWest	4h 56m	70%	48%
American Details →	ORD 14:59 → DFW 17:36AA 2257	1h 16m Dallas-Fort Worth	DFW 18:52 → ASE 20:17AA 6419 · flown by SkyWest	6h 18m	70%	40%
United Details →	ORD 16:12 → DEN 18:13UA 2769	57m Denver	DEN 19:10 → ASE 20:11UA 5779 · flown by SkyWest	4h 59m	56%	37%

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 03m · leaves 05:00 1%

ATL · 1h 12m · leaves 05:30 7%

DFW · 1h 00m · leaves 05:00 11%

Afternoon and evening

IAH · 1h 15m · leaves 12:40 7%

DEN · 54m · leaves 14:33 30%

DFW · 1h 16m · leaves 14:59 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 2718 ORD 12:02 → LAX Delta DL 3704 LAX 17:12 → ASE Connection details →	2h 44m	9h 21m	93%	76%
American AA 607 ORD 06:00 → LAX United UA 4700 LAX 10:17 → ASE Connection details →	1h 57m	8h 38m	92%	72%
American AA 1744 ORD 10:00 → DEN United UA 5773 DEN 15:07 → ASE Connection details →	3h 23m	7h 08m	97%	69%

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