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 75-minute layover misses 5% of the time at 7 am and 16% of the time at 6 pm.

Nonstops


United	RDU	IAH	3h 07m	88%	0.9%	1,037	Flying now
Frontier	RDU	IAH	3h 09m	76%	2.2%	227	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 Raleigh/Durham). Layovers up to 4 hours. Pick a connection for the details.


American Details →	RDU 05:01 → CLT 06:00AA 1903	1h 42m Charlotte	CLT 07:42 → IAH 09:25AA 1930	5h 24m	98%	88%
United Details →	RDU 06:00 → IAD 07:11UA 1789	1h 29m Dulles	IAD 08:40 → IAH 10:59UA 1524	5h 59m	98%	84%
Delta Details →	RDU 07:30 → ATL 08:59DL 2478	3h 31m Atlanta	ATL 12:30 → IAH 13:38DL 1572	7h 08m	98%	83%
United Details →	RDU 10:00 → ORD 11:26UA 1448	1h 14m Chicago	ORD 12:40 → IAH 15:40UA 1448	6h 40m	90%	79%
Delta Details →	RDU 05:20 → ATL 06:44DL 1552	3h 21m Atlanta	ATL 10:05 → IAH 11:18DL 1682	6h 58m	99%	78%
Delta Details →	RDU 05:33 → DTW 07:18DL 1388	1h 22m Detroit	DTW 08:40 → IAH 10:36DL 1043	6h 03m	95%	78%
Delta Details →	RDU 06:00 → MSP 07:46DL 2538	2h 38m Minneapolis	MSP 10:24 → IAH 13:15DL 2673	8h 17m	98%	76%
United Details →	RDU 10:32 → IAD 11:43UA 1535	1h 07m Dulles	IAD 12:50 → IAH 15:11UA 1535	5h 39m	91%	76%
Tight connection: often missed
United Details →	RDU 15:14 → EWR 17:00UA 2415	54m Newark	EWR 17:54 → IAH 20:55UA 2782	6h 41m	74%	48%
American Details →	RDU 11:41 → DFW 13:45AA 2366	48m Dallas-Fort Worth	DFW 14:33 → IAH 15:48AA 3583 · flown by Envoy	5h 07m	65%	46%
United Details →	RDU 17:12 → ORD 18:42UA 630	1h 20m Chicago	ORD 20:02 → IAH 22:59UA 2813	6h 47m	65%	34%

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

DEN · 1h 17m · leaves 08:30 3%

ATL · 1h 08m · leaves 09:58 3%

DFW · 1h 08m · leaves 05:16 7%

Afternoon and evening

CLT · 1h 00m · leaves 18:29 42%

DFW · 1h 04m · leaves 19:31 46%

PHL · 54m · leaves 17:22 58%

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 4532 RDU 07:45 → PIT United UA 1964 PIT 13:05 → IAH Connection details →	3h 53m	8h 23m	100%	99%
Southwest WN 3430 RDU 07:15 → MCO United UA 1493 MCO 11:57 → IAH Connection details →	3h 02m	7h 14m	100%	95%
American AA 2420 RDU 06:41 → CLT United UA 6236 CLT 11:48 → IAH Connection details →	3h 59m	7h 53m	100%	89%

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