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

Nonstops


United	IAH	JAX	2h 17m	81%	0.4%	1,287	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	IAH 05:40 → ATL 08:43DL 1069	2h 05m Atlanta	ATL 10:48 → JAX 12:00DL 2923	5h 20m	99%	82%
Delta Details →	IAH 08:05 → ATL 11:09DL 644	2h 48m Atlanta	ATL 13:57 → JAX 15:07DL 2990	6h 03m	100%	79%
United Details →	IAH 06:10 → ORD 09:05UA 2616	1h 37m Chicago	ORD 10:42 → JAX 14:27UA 2427	7h 17m	98%	77%
Delta Details →	IAH 07:02 → ATL 10:05DL 1315	2h 28m Atlanta	ATL 12:33 → JAX 13:43DL 3024	5h 41m	98%	76%
United Details →	IAH 07:20 → DEN 08:52UA 1575	1h 13m Denver	DEN 10:05 → JAX 15:39UA 1451	7h 19m	89%	74%
United Details →	IAH 07:20 → EWR 11:59UA 1886	1h 02m Newark	EWR 13:01 → JAX 15:42UA 2678	7h 22m	89%	72%
Delta Details →	IAH 09:42 → ATL 12:48DL 1585	2h 32m Atlanta	ATL 15:20 → JAX 16:33DL 2720	5h 51m	98%	71%
American Details →	IAH 06:01 → CLT 09:43AA 2011	1h 43m Charlotte	CLT 11:26 → JAX 12:51AA 2001	5h 50m	95%	70%
Tight connection: often missed
American Details →	IAH 14:25 → PHX 15:16AA 2710	53m Phoenix	PHX 16:09 → JAX 23:15AA 2844	7h 50m	74%	53%
American Details →	IAH 16:18 → DFW 17:48AA 3583 · flown by Envoy	1h 04m Dallas-Fort Worth	DFW 18:52 → JAX 22:24AA 2263	5h 06m	70%	32%
American Details →	IAH 18:12 → MIA 21:50AA 1931	1h 03m Miami	MIA 22:53 → JAX 00:15 +1AA 416	5h 03m	45%	23%

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

DCA · 59m · leaves 06:43 8%

LGA · 1h 06m · leaves 07:00 10%

EWR · 1h 02m · leaves 07:20 11%

Afternoon and evening

DFW · 1h 04m · leaves 16:18 30%

ATL · 54m · leaves 18:34 31%

MIA · 1h 03m · leaves 18:12 55%

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 2469 IAH 08:00 → MSP Delta DL 2392 MSP 12:57 → JAX Connection details →	2h 04m	7h 52m	96%	81%
United UA 1030 IAH 07:20 → ATL Delta DL 2990 ATL 13:57 → JAX Connection details →	3h 18m	6h 48m	99%	79%
United UA 2016 IAH 07:35 → AUS Delta DL 3772 AUS 10:11 → JAX Connection details →	1h 32m	5h 22m	89%	76%

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