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 IAD → RDU flights land within a few points of 83% on time whatever the hour.

Nonstops


United	IAD	RDU	1h 14m	83%	1.2%	1,452	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Raleigh/Durham on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


United Details →	IAD 06:33 → EWR 07:52UA 2147	2h 08m Newark	EWR 10:00 → RDU 11:52UA 3631 · flown by Republic	5h 19m	100%	89%
Delta Details →	IAD 06:00 → ATL 07:46DL 2127	3h 28m Atlanta	ATL 11:14 → RDU 12:44DL 1488	6h 44m	98%	86%
Delta Details →	IAD 06:00 → DTW 07:40DL 3826 · flown by SkyWest	2h 35m Detroit	DTW 10:15 → RDU 11:57DL 2164	6h 00m	96%	85%
Delta Details →	IAD 08:27 → ATL 10:17DL 3080	2h 45m Atlanta	ATL 13:02 → RDU 14:29DL 2026	6h 02m	97%	84%
American Details →	IAD 06:33 → CLT 08:00AA 1216	3h 04m Charlotte	CLT 11:04 → RDU 12:02AA 2363	5h 29m	97%	83%
Delta Details →	IAD 11:10 → DTW 12:44DL 2884	3h 15m Detroit	DTW 15:59 → RDU 17:44DL 1407	6h 34m	100%	82%
United Details →	IAD 06:10 → ORD 07:27UA 2070	1h 43m Chicago	ORD 09:10 → RDU 12:33UA 5326 · flown by SkyWest	6h 23m	95%	82%
United Details →	IAD 10:31 → ORD 11:53UA 1252	2h 20m Chicago	ORD 14:13 → RDU 17:27UA 2091	6h 56m	100%	79%
Tight connection: often missed
United Details →	IAD 14:53 → IAH 17:11UA 2857	57m Houston	IAH 18:08 → RDU 21:59UA 2498	7h 06m	68%	52%
United Details →	IAD 15:39 → ORD 17:02UA 1393	1h 23m Chicago	ORD 18:25 → RDU 21:37UA 1989	5h 58m	72%	37%
American Details →	IAD 20:22 → CLT 21:55AA 1450	1h 02m Charlotte	CLT 22:57 → RDU 23:58AA 494	3h 36m	52%	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

ORD · 1h 12m · leaves 08:15 9%

IAH · 1h 04m · leaves 08:40 10%

ATL · 57m · leaves 06:00 12%

Afternoon and evening

CLT · 1h 02m · leaves 20:22 29%

IAH · 57m · leaves 14:53 32%

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 2739 IAD 08:15 → ATL Delta DL 2026 ATL 13:02 → RDU Connection details →	2h 48m	6h 14m	97%	85%
United UA 2070 IAD 06:10 → ORD American AA 4756 ORD 09:29 → RDU Connection details →	2h 02m	6h 38m	95%	84%
United UA 1366 IAD 08:30 → BNA American AA 4639 BNA 12:00 → RDU Connection details →	2h 31m	6h 13m	95%	83%

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