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

Nonstops


United	ECP	IAH	2h 05m	85%	0.7%	1,282	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Houston on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	ECP 07:41 → ATL 09:55DL 1674	2h 35m Atlanta	ATL 12:30 → IAH 13:38DL 1572	5h 57m	98%	82%
Delta Details →	ECP 06:00 → ATL 08:15DL 3114	1h 50m Atlanta	ATL 10:05 → IAH 11:18DL 1682	5h 18m	95%	76%
United Details →	ECP 10:25 → ORD 13:09UA 5874 · flown by SkyWest	1h 06m Chicago	ORD 14:15 → IAH 17:20UA 2451	6h 55m	91%	71%
Delta Details →	ECP 17:08 → ATL 19:24DL 3094	3h 20m Atlanta	ATL 22:44 → IAH 23:56DL 1601	6h 48m	98%	71%
Delta Details →	ECP 14:47 → ATL 17:00DL 2823	3h 21m Atlanta	ATL 20:21 → IAH 21:34DL 1284	6h 47m	97%	69%
American Details →	ECP 10:06 → DFW 12:23AA 3503 · flown by Envoy	2h 10m Dallas-Fort Worth	DFW 14:33 → IAH 15:48AA 3583 · flown by Envoy	5h 42m	100%	69%
Delta Details →	ECP 09:19 → ATL 11:31DL 3048	3h 15m Atlanta	ATL 14:46 → IAH 15:56DL 2890	6h 39m	99%	68%
Delta Details →	ECP 11:43 → ATL 13:55DL 3045	2h 30m Atlanta	ATL 16:25 → IAH 17:39DL 1223	5h 56m	97%	64%
Tight connection: often missed
United Details →	ECP 14:05 → ORD 16:50UA 5654 · flown by SkyWest	55m Chicago	ORD 17:45 → IAH 20:50UA 1954	6h 45m	54%	39%
American Details →	ECP 18:56 → DFW 21:13AA 5651 · flown by PSA	1h 34m Dallas-Fort Worth	DFW 22:47 → IAH 23:58AA 1914	5h 02m	71%	29%
American Details →	ECP 15:23 → DFW 17:50AA 1796	46m Dallas-Fort Worth	DFW 18:36 → IAH 19:54AA 1392	4h 31m	38%	18%

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

ATL · 59m · leaves 09:19 10%

Afternoon and evening

ATL · 57m · leaves 17:08 18%

DFW · 46m · leaves 15:23 62%

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 3114 ECP 06:00 → ATL United UA 425 ATL 11:37 → IAH Connection details →	3h 22m	6h 47m	96%	85%
Southwest WN 1785 ECP 07:50 → BNA United UA 1366 BNA 11:10 → IAH Connection details →	1h 55m	5h 33m	98%	80%
Southwest WN 1784 ECP 14:55 → AUS United UA 1871 AUS 19:44 → IAH Connection details →	2h 44m	6h 00m	94%	79%

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