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

No clear winner: United’s ASE → DEN flights land within a few points of 77% on time whatever the hour.

Nonstops


United	ASE	DEN	1h 13m	77%	5.0%	2,725	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. Layovers up to 4 hours. Pick a connection for the details.


United Details →	ASE 07:00 → IAH 10:47UA 5300 · flown by SkyWest	1h 46m Houston	IAH 12:33 → DEN 14:17UA 2168	7h 17m	92%	76%
United Details →	ASE 12:39 → ORD 16:45UA 5956 · flown by SkyWest	3h 18m Chicago	ORD 20:03 → DEN 22:04UA 329	9h 25m	94%	68%
American Details →	ASE 07:36 → DFW 10:57AA 6345 · flown by SkyWest	2h 20m Dallas-Fort Worth	DFW 13:17 → DEN 14:21AA 420	6h 45m	91%	65%
Delta Details →	ASE 07:36 → ATL 13:09DL 3924 · flown by SkyWest	3h 30m Atlanta	ATL 16:39 → DEN 17:56DL 519	10h 21m	97%	64%
United Details →	ASE 09:40 → SFO 11:19UA 5745 · flown by SkyWest	3h 01m San Francisco	SFO 14:20 → DEN 18:11UA 1596	8h 31m	91%	62%
United Details →	ASE 09:00 → ORD 13:04UA 4669 · flown by SkyWest	1h 29m Chicago	ORD 14:33 → DEN 16:31UA 2803	7h 31m	83%	62%
United Details →	ASE 11:43 → IAH 15:40UA 5493 · flown by SkyWest	2h 39m Houston	IAH 18:19 → DEN 20:14UA 1654	8h 31m	92%	57%
American Details →	ASE 07:25 → ORD 11:31AA 6225 · flown by SkyWest	3h 44m Chicago	ORD 15:15 → DEN 17:00AA 1734	9h 35m	92%	57%
Tight connection: often missed
United Details →	ASE 09:40 → SFO 11:19UA 5745 · flown by SkyWest	1h 24m San Francisco	SFO 12:43 → DEN 16:35UA 540	6h 55m	63%	47%
American Details →	ASE 14:21 → DFW 17:40AA 6384 · flown by SkyWest	50m Dallas-Fort Worth	DFW 18:30 → DEN 19:41AA 2235	5h 20m	48%	21%

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 · 50m · leaves 14:21 52%

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.


Delta DL 3924 ASE 07:36 → ATL United UA 235 ATL 16:22 → DEN Connection details →	3h 13m	10h 32m	94%	71%
American AA 6205 ASE 13:46 → AUS Frontier F9 1859 AUS 20:15 → DEN Connection details →	3h 06m	8h 03m	91%	71%
American AA 6345 ASE 07:36 → DFW United UA 248 DFW 13:44 → DEN Connection details →	2h 47m	7h 19m	86%	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