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 IAH → ASE flights land within a few points of 3 in 4 on time whatever the hour.

Nonstops (seasonal or thin)


United	IAH	ASE	3h 17m	75%	2.7%	624	Flying now

Best connections, any airlines

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 Houston). Layovers up to 4 hours. Pick a connection for the details.


United + Deltatwo ticketsDetails →	IAH 12:33 → LAX 14:06UA 2460	3h 06m Los Angeles	LAX 17:12 → ASE 20:23DL 3704 · flown by SkyWest	8h 50m	97%	82%
United Details →	IAH 05:15 → DEN 06:47UA 1874	58m Denver	DEN 07:45 → ASE 08:46UA 5444 · flown by SkyWest	4h 31m	96%	80%
United Details →	IAH 06:00 → LAX 07:29UA 2110	2h 48m Los Angeles	LAX 10:17 → ASE 13:38UA 4700 · flown by SkyWest	8h 38m	100%	79%
United Details →	IAH 06:30 → DEN 08:02UA 2643	1h 48m Denver	DEN 09:50 → ASE 10:51UA 5782 · flown by SkyWest	5h 21m	98%	76%
American Details →	IAH 06:02 → DFW 07:28AA 700	3h 22m Dallas-Fort Worth	DFW 10:50 → ASE 12:21AA 4912 · flown by SkyWest	7h 19m	97%	74%
United Details →	IAH 09:32 → DEN 11:08UA 1450	3h 59m Denver	DEN 15:07 → ASE 16:08UA 5773 · flown by SkyWest	7h 36m	100%	72%
United Details →	IAH 15:00 → DEN 16:43UA 2767	3h 42m Denver	DEN 20:25 → ASE 21:26UA 5781 · flown by SkyWest	7h 26m	97%	71%
United Details →	IAH 08:30 → DEN 10:05UA 2816	1h 13m Denver	DEN 11:18 → ASE 12:26UA 5769 · flown by SkyWest	4h 56m	97%	70%
Tight connection: often missed
United Details →	IAH 16:21 → DEN 18:23UA 484	47m Denver	DEN 19:10 → ASE 20:11UA 5779 · flown by SkyWest	4h 50m	74%	49%
American Details →	IAH 16:18 → DFW 17:48AA 3583 · flown by Envoy	1h 04m Dallas-Fort Worth	DFW 18:52 → ASE 20:17AA 6419 · flown by SkyWest	4h 59m	70%	40%

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

LAX · 1h 20m · leaves 07:20 3%

DEN · 58m · leaves 05:15 4%

ATL · 1h 02m · leaves 05:40 6%

Afternoon and evening

DFW · 1h 04m · leaves 16:18 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.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

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