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 8% of the time at 9 am and 44% of the time at 4 pm.

Nonstops


United	IAH	ATL	2h 11m	82%	0.6%	1,630	Flying now
Delta	IAH	ATL	2h 07m	81%	2.1%	2,520	Flying now
Frontier	IAH	ATL	2h 22m	63%	2.9%	798	Flying now
Spirit	IAH	ATL	2h 00m	76%	4.8%	334	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Atlanta on time. Total trip = scheduled departure to arrival, layover included (Atlanta 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 30m Chicago	ORD 10:29 → ATL 13:44UA 2684	7h 40m	100%	86%
United Details →	IAH 06:30 → DEN 08:02UA 2643	1h 58m Denver	DEN 10:00 → ATL 15:10UA 2424	7h 40m	100%	84%
Delta Details →	IAH 05:20 → DTW 09:11DL 1389	1h 14m Detroit	DTW 10:25 → ATL 12:25DL 2856	6h 03m	96%	81%
United Details →	IAH 07:20 → IAD 11:28UA 1549	1h 07m Dulles	IAD 12:35 → ATL 14:34UA 471	6h 14m	94%	80%
Delta Details →	IAH 06:30 → MSP 09:18DL 1050	1h 22m Minneapolis	MSP 10:40 → ATL 14:05DL 1046	6h 35m	92%	77%
Delta Details →	IAH 14:20 → SLC 16:35DL 1532	1h 20m Salt Lake City	SLC 17:55 → ATL 23:48DL 905	8h 28m	91%	76%
United Details →	IAH 09:32 → DEN 11:08UA 1450	2h 18m Denver	DEN 13:26 → ATL 18:30UA 1671	7h 58m	96%	75%
Delta Details →	IAH 10:52 → MSP 13:41DL 2656	2h 28m Minneapolis	MSP 16:09 → ATL 19:46DL 1028	7h 54m	96%	75%
Tight connection: often missed
American Details →	IAH 15:06 → CLT 18:51AA 1919	1h 38m Charlotte	CLT 20:29 → ATL 21:52AA 5528 · flown by PSA	5h 45m	74%	34%
JetBlue Details →	IAH 13:27 → BOS 18:20B6 932	1h 31m Boston	BOS 19:51 → ATL 22:42B6 1897	8h 18m	74%	30%
American Details →	IAH 11:20 → MIA 15:01AA 1918	59m Miami	MIA 16:00 → ATL 18:04AA 1367	5h 44m	56%	25%

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 08m · leaves 05:04 2%

DTW · 1h 14m · leaves 05:20 4%

IAD · 1h 07m · leaves 07:20 6%

Afternoon and evening

IAD · 47m · leaves 12:13 44%

BWI · 1h 01m · leaves 16:21 47%

PHL · 46m · leaves 12:21 75%

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 2266 IAH 08:00 → MCI Delta DL 2908 MCI 12:21 → ATL Connection details →	2h 18m	6h 28m	99%	88%
United UA 6149 IAH 07:20 → MKE Delta DL 1151 MKE 12:56 → ATL Connection details →	2h 51m	7h 44m	97%	87%
United UA 491 IAH 07:30 → MSY Delta DL 1424 MSY 10:35 → ATL Connection details →	1h 49m	4h 36m	94%	85%

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