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 CHA → IAH flights land within a few points of 64% on time whatever the hour.

Nonstops (seasonal or thin)


United	CHA	IAH	2h 28m	64%	0.4%	247	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 (Houston is 1 h behind Chattanooga). Layovers up to 4 hours. Pick a connection for the details.


American Details →	CHA 05:00 → CLT 06:32AA 5866 · flown by Piedmont	1h 10m Charlotte	CLT 07:42 → IAH 09:25AA 1930	5h 25m	100%	92%
Delta Details →	CHA 08:24 → ATL 09:27DL 5448 · flown by Endeavor	3h 03m Atlanta	ATL 12:30 → IAH 13:38DL 1572	6h 14m	96%	80%
Delta Details →	CHA 05:35 → ATL 06:29DL 1044	3h 36m Atlanta	ATL 10:05 → IAH 11:18DL 1682	6h 43m	100%	80%
United Details →	CHA 06:00 → ORD 06:59UA 4540 · flown by GoJet	1h 52m Chicago	ORD 08:51 → IAH 11:51UA 535	6h 51m	96%	77%
United Details →	CHA 10:27 → ORD 11:29UA 4407 · flown by GoJet	1h 11m Chicago	ORD 12:40 → IAH 15:40UA 1448	6h 13m	86%	74%
United Details →	CHA 13:53 → ORD 14:55UA 4571 · flown by GoJet	2h 50m Chicago	ORD 17:45 → IAH 20:50UA 1954	7h 57m	94%	70%
Delta Details →	CHA 16:06 → ATL 17:05DL 3057	3h 16m Atlanta	ATL 20:21 → IAH 21:34DL 1284	6h 28m	98%	69%
American Details →	CHA 06:05 → ORD 07:02AA 3725 · flown by Envoy	2h 58m Chicago	ORD 10:00 → IAH 12:46AA 1915	7h 41m	100%	67%
Tight connection: often missed
American Details →	CHA 06:04 → DFW 07:24AA 426	1h 11m Dallas-Fort Worth	DFW 08:35 → IAH 09:47AA 1916	4h 43m	67%	44%
American Details →	CHA 20:14 → DFW 21:31AA 5115 · flown by PSA	1h 16m Dallas-Fort Worth	DFW 22:47 → IAH 23:58AA 1914	4h 44m	74%	27%
American Details →	CHA 16:22 → DFW 17:44AA 2121	52m Dallas-Fort Worth	DFW 18:36 → IAH 19:54AA 1392	4h 32m	34%	15%

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

CLT · 1h 10m · leaves 05:00 0%

ATL · 1h 01m · leaves 05:35 0%

ORD · 1h 11m · leaves 10:27 14%

Afternoon and evening

DFW · 52m · leaves 16:22 66%

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.


American AA 4580 CHA 07:04 → DCA United UA 2190 DCA 10:58 → IAH Connection details →	1h 59m	7h 15m	99%	84%
Delta DL 4652 CHA 06:00 → DTW United UA 6251 DTW 10:55 → IAH Connection details →	3h 00m	7h 57m	96%	82%
American AA 6105 CHA 08:18 → CLT United UA 6236 CLT 11:48 → IAH Connection details →	1h 53m	6h 16m	86%	77%

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