Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

Connect in the morning. The same one-hour layover misses 6% of the time at 11 am and 1 time in 4 at 8 pm.

Nonstops


United	BHM	IAH	2h 07m	83%	1.1%	1,618	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 →	BHM 07:28 → ATL 09:32DL 1369	2h 58m Atlanta	ATL 12:30 → IAH 13:38DL 1572	6h 10m	97%	81%
Delta Details →	BHM 05:15 → ATL 07:21DL 1979	2h 44m Atlanta	ATL 10:05 → IAH 11:18DL 1682	6h 03m	99%	80%
United Details →	BHM 15:40 → DEN 17:54UA 447	2h 34m Denver	DEN 20:28 → IAH 23:59UA 2419	8h 19m	93%	74%
Delta Details →	BHM 17:24 → ATL 19:30DL 2484	3h 14m Atlanta	ATL 22:44 → IAH 23:56DL 1601	6h 32m	98%	73%
American Details →	BHM 08:26 → CLT 10:59AA 2349	3h 53m Charlotte	CLT 14:52 → IAH 16:38AA 1920	8h 11m	100%	72%
Delta Details →	BHM 06:25 → DTW 09:27DL 3006	3h 03m Detroit	DTW 12:30 → IAH 14:30DL 1864	8h 05m	99%	71%
United Details →	BHM 08:10 → DEN 10:35UA 5295 · flown by SkyWest	59m Denver	DEN 11:34 → IAH 15:09UA 1599	6h 59m	92%	71%
United Details →	BHM 13:22 → ORD 15:45UA 4168 · flown by GoJet	2h 00m Chicago	ORD 17:45 → IAH 20:50UA 1954	7h 28m	94%	70%
Tight connection: often missed
American Details →	BHM 14:45 → CLT 17:29AA 5075 · flown by PSA	1h 12m Charlotte	CLT 18:41 → IAH 20:33AA 2935	5h 48m	67%	40%
American Details →	BHM 15:12 → DFW 17:24AA 5063 · flown by PSA	1h 12m Dallas-Fort Worth	DFW 18:36 → IAH 19:54AA 1392	4h 42m	55%	26%

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 01m · leaves 09:28 6%

DEN · 59m · leaves 08:10 8%

ORD · 1h 11m · leaves 06:22 9%

Afternoon and evening

ATL · 51m · leaves 17:24 24%

CLT · 1h 12m · leaves 14:45 33%

DFW · 1h 12m · leaves 15:12 45%

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.


Southwest WN 440 BHM 06:50 → MCO United UA 1493 MCO 11:57 → IAH Connection details →	2h 32m	6h 39m	98%	93%
Delta DL 1618 BHM 06:15 → ATL United UA 425 ATL 11:37 → IAH Connection details →	3h 16m	6h 32m	98%	85%
American AA 3423 BHM 06:05 → MIA United UA 470 MIA 12:29 → IAH Connection details →	3h 22m	8h 18m	98%	84%

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