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 → CHA flights land within a few points of 2 in 3 on time whatever the hour.

Nonstops (seasonal or thin)


United	IAH	CHA	2h 11m	68%	0.0%	248	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	IAH 05:04 → ORD 07:59UA 1044	2h 26m Chicago	ORD 10:25 → CHA 13:16UA 4543 · flown by GoJet	7h 12m	100%	86%
Delta Details →	IAH 05:40 → ATL 08:43DL 1069	2h 50m Atlanta	ATL 11:33 → CHA 12:23DL 1737	5h 43m	99%	86%
Delta Details →	IAH 07:02 → ATL 10:05DL 1315	3h 09m Atlanta	ATL 13:14 → CHA 14:05DL 3141	6h 03m	98%	82%
American Details →	IAH 05:02 → DFW 06:19AA 2551	2h 21m Dallas-Fort Worth	DFW 08:40 → CHA 11:47AA 3451 · flown by Envoy	5h 45m	95%	82%
American Details →	IAH 06:01 → CLT 09:43AA 2011	1h 42m Charlotte	CLT 11:25 → CHA 12:54AA 6127 · flown by Piedmont	5h 53m	95%	75%
Delta Details →	IAH 08:05 → ATL 11:09DL 644	3h 17m Atlanta	ATL 14:26 → CHA 15:20DL 3057	6h 15m	100%	73%
American Details →	IAH 08:54 → CLT 12:30AA 3162	2h 10m Charlotte	CLT 14:40 → CHA 16:08AA 6051 · flown by Piedmont	6h 14m	92%	67%
Delta Details →	IAH 12:13 → ATL 15:23DL 1682	3h 17m Atlanta	ATL 18:40 → CHA 19:33DL 3150	6h 20m	99%	64%
Tight connection: often missed
American Details →	IAH 15:06 → CLT 18:51AA 1919	1h 33m Charlotte	CLT 20:24 → CHA 21:52AA 5787 · flown by Piedmont	5h 46m	73%	57%
Delta Details →	IAH 14:43 → ATL 17:54DL 1572	46m Atlanta	ATL 18:40 → CHA 19:33DL 3150	3h 50m	70%	45%
Delta Details →	IAH 14:10 → LGA 18:56DL 2088	54m New York	LGA 19:50 → CHA 22:22DL 5276 · flown by Endeavor	7h 12m	71%	39%

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 20m · leaves 06:10 4%

DFW · 1h 12m · leaves 06:02 8%

Afternoon and evening

DTW · 55m · leaves 15:27 42%

ATL · 57m · leaves 16:51 43%

DFW · 1h 00m · leaves 14:04 51%

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.


United UA 1030 IAH 07:20 → ATL Delta DL 3141 ATL 13:14 → CHA Connection details →	2h 35m	5h 45m	98%	83%
United UA 3988 IAH 07:25 → CLT American AA 6051 CLT 14:40 → CHA Connection details →	3h 38m	7h 43m	98%	73%
United UA 6131 IAH 13:58 → DTW Delta DL 4894 DTW 20:10 → CHA Connection details →	2h 11m	7h 04m	94%	72%

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