Sun, Oct 4 has passed, so this is the 12-month record.

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 → COS flights land within a few points of 85% on time whatever the hour.

Nonstops (seasonal or thin)


United	IAH	COS	2h 37m	85%	0.4%	721	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	IAH 18:19 → DEN 20:14UA 1654	2h 55m Denver	DEN 23:09 → COS 23:59UA 4745 · flown by SkyWest	6h 40m	97%	83%
United Details →	IAH 05:04 → ORD 07:59UA 1044	1h 07m Chicago	ORD 09:06 → COS 11:09UA 1082	7h 05m	98%	82%
United Details →	IAH 15:00 → DEN 16:43UA 2767	3h 07m Denver	DEN 19:50 → COS 20:46UA 5669 · flown by SkyWest	6h 46m	97%	81%
United Details →	IAH 05:15 → DEN 06:47UA 1874	58m Denver	DEN 07:45 → COS 08:41UA 5246 · flown by SkyWest	4h 26m	96%	81%
American Details →	IAH 07:00 → DFW 08:31AA 3002	2h 57m Dallas-Fort Worth	DFW 11:28 → COS 12:37AA 6390 · flown by SkyWest	6h 37m	96%	81%
United Details →	IAH 06:30 → DEN 08:02UA 2643	1h 43m Denver	DEN 09:45 → COS 10:46UA 5306 · flown by SkyWest	5h 16m	98%	79%
Delta Details →	IAH 05:40 → ATL 08:43DL 1069	2h 47m Atlanta	ATL 11:30 → COS 12:35DL 2427	7h 55m	99%	79%
United Details →	IAH 10:31 → DEN 12:07UA 1409	3h 28m Denver	DEN 15:35 → COS 16:32UA 5546 · flown by SkyWest	7h 01m	98%	76%
Tight connection: often missed
United Details →	IAH 07:20 → DEN 08:52UA 1575	53m Denver	DEN 09:45 → COS 10:46UA 5306 · flown by SkyWest	4h 26m	74%	59%
United Details →	IAH 18:19 → DEN 20:14UA 1654	56m Denver	DEN 21:10 → COS 22:06UA 4650 · flown by SkyWest	4h 47m	63%	47%
American Details →	IAH 14:04 → DFW 15:30AA 2512	1h 57m Dallas-Fort Worth	DFW 17:27 → COS 18:34AA 6267 · flown by SkyWest	5h 30m	70%	43%

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 07m · leaves 05:04 2%

DEN · 58m · leaves 05:15 4%

Afternoon and evening

DEN · 56m · leaves 18:19 37%

DFW · 1h 00m · leaves 18:53 77%

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.


Frontier F9 3227 IAH 18:14 → DEN United UA 4745 DEN 23:09 → COS Connection details →	3h 11m	6h 45m	97%	82%
United UA 358 IAH 07:23 → DFW American AA 6390 DFW 11:28 → COS Connection details →	2h 38m	6h 14m	94%	81%
United UA 1044 IAH 05:04 → ORD American AA 4955 ORD 10:00 → COS Connection details →	2h 01m	7h 48m	99%	73%

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