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 45-minute layover misses 22% of the time at 9 am and 62% of the time at 8 pm.

Nonstops


United	ORD	RDU	2h 11m	79%	1.2%	1,529	Flying now
American	ORD	RDU	2h 08m	72%	3.3%	2,013	Flying now
Frontier	ORD	RDU	2h 06m	67%	4.4%	114	Not 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 (Raleigh/Durham is 1 h ahead of Chicago). Layovers up to 4 hours. Pick a connection for the details.


American Details →	ORD 06:40 → BNA 08:23AA 3973 · flown by Envoy	3h 37m Nashville	BNA 12:00 → RDU 14:42AA 4639 · flown by Republic	7h 03m	100%	88%
United Details →	ORD 06:00 → DEN 07:42UA 2806	2h 07m Denver	DEN 09:49 → RDU 15:16UA 2269	8h 16m	100%	88%
Delta Details →	ORD 05:30 → ATL 08:33DL 1264	2h 41m Atlanta	ATL 11:14 → RDU 12:44DL 1488	6h 14m	98%	87%
Delta Details →	ORD 06:35 → ATL 09:41DL 1247	3h 21m Atlanta	ATL 13:02 → RDU 14:29DL 2026	6h 54m	98%	85%
American Details →	ORD 05:58 → DCA 09:15AA 4339 · flown by Republic	2h 09m Washington	DCA 11:24 → RDU 12:44AA 4700 · flown by Republic	5h 46m	100%	84%
American Details →	ORD 05:07 → CLT 08:10AA 2842	2h 54m Charlotte	CLT 11:04 → RDU 12:02AA 2363	5h 55m	97%	84%
Delta Details →	ORD 06:30 → MSP 08:06DL 1717	2h 15m Minneapolis	MSP 10:21 → RDU 13:53DL 2521	6h 21m	95%	81%
Delta Details →	ORD 09:45 → ATL 12:51DL 1178	1h 54m Atlanta	ATL 14:45 → RDU 16:14DL 1550	5h 29m	98%	80%
Tight connection: often missed
American Details →	ORD 08:30 → DFW 11:04AA 1555	1h 08m Dallas-Fort Worth	DFW 12:12 → RDU 15:59AA 2371	6h 29m	75%	44%
American Details →	ORD 16:05 → MIA 20:26AA 2910	1h 21m Miami	MIA 21:47 → RDU 23:59AA 1286	6h 54m	60%	36%
Delta Details →	ORD 17:57 → MSP 19:38DL 1306	47m Minneapolis	MSP 20:25 → RDU 23:59DL 2932	5h 02m	38%	27%

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

CLT · 1h 11m · leaves 05:07 7%

IAD · 58m · leaves 08:40 8%

DEN · 54m · leaves 07:05 10%

Afternoon and evening

BOS · 1h 06m · leaves 15:19 36%

IAD · 1h 03m · leaves 18:12 39%

MSP · 47m · leaves 17:57 62%

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 425 ORD 07:12 → ATL Delta DL 2026 ATL 13:02 → RDU Connection details →	2h 35m	6h 17m	100%	88%
United UA 1269 ORD 06:30 → BWI Southwest WN 4442 BWI 11:35 → RDU Connection details →	2h 08m	5h 15m	97%	86%
United UA 1077 ORD 06:00 → DCA American AA 4700 DCA 11:24 → RDU Connection details →	2h 30m	5h 44m	99%	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