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 SHV → IAH flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops


United	SHV	IAH	1h 17m	79%	1.8%	1,555	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 →	SHV 07:46 → ATL 10:40DL 4117 · flown by SkyWest	1h 50m Atlanta	ATL 12:30 → IAH 13:38DL 1572	5h 52m	90%	76%
Delta Details →	SHV 06:00 → ATL 08:59DL 3504 · flown by SkyWest	1h 06m Atlanta	ATL 10:05 → IAH 11:18DL 1682	5h 18m	92%	75%
United Details →	SHV 08:45 → DEN 10:19UA 5561 · flown by SkyWest	1h 15m Denver	DEN 11:34 → IAH 15:09UA 1599	6h 24m	89%	69%
United Details →	SHV 16:27 → DEN 17:57UA 5260 · flown by SkyWest	2h 31m Denver	DEN 20:28 → IAH 23:59UA 2419	7h 32m	84%	67%
Delta Details →	SHV 10:28 → ATL 13:19DL 5302 · flown by Endeavor	3h 06m Atlanta	ATL 16:25 → IAH 17:39DL 1223	7h 11m	100%	67%
Delta Details →	SHV 17:18 → ATL 20:14DL 4111 · flown by SkyWest	2h 30m Atlanta	ATL 22:44 → IAH 23:56DL 1601	6h 38m	89%	66%
American Details →	SHV 11:15 → DFW 12:30AA 5136 · flown by PSA	2h 03m Dallas-Fort Worth	DFW 14:33 → IAH 15:48AA 3583 · flown by Envoy	4h 33m	95%	66%
American Details →	SHV 06:00 → DFW 07:23AA 6511 · flown by SkyWest	2h 12m Dallas-Fort Worth	DFW 09:35 → IAH 10:53AA 3591 · flown by Envoy	4h 53m	95%	63%
Tight connection: often missed
United Details →	SHV 16:27 → DEN 17:57UA 5260 · flown by SkyWest	1h 38m Denver	DEN 19:35 → IAH 23:06UA 475	6h 39m	74%	56%
American Details →	SHV 20:20 → DFW 21:47AA 4128 · flown by Envoy	1h 00m Dallas-Fort Worth	DFW 22:47 → IAH 23:58AA 1914	3h 38m	62%	24%

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 · 1h 06m · leaves 06:00 8%

DEN · 1h 15m · leaves 08:45 11%

DFW · 1h 12m · leaves 06:00 12%

Afternoon and evening

DFW · 1h 00m · leaves 20:20 38%

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 3504 SHV 06:00 → ATL United UA 425 ATL 11:37 → IAH Connection details →	2h 38m	6h 47m	96%	86%
American AA 4130 SHV 14:36 → DFW United UA 2114 DFW 19:34 → IAH Connection details →	3h 36m	6h 19m	97%	74%
American AA 6511 SHV 06:00 → DFW United UA 1586 DFW 09:46 → IAH Connection details →	2h 23m	5h 03m	93%	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