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 5% of the time at 7 am and 35% of the time at 4 pm.

Nonstops


United	RDU	IAD	1h 13m	87%	1.2%	1,453	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	RDU 05:33 → DTW 07:18DL 1388	1h 32m Detroit	DTW 08:50 → IAD 10:23DL 2884	4h 52m	96%	85%
American Details →	RDU 05:01 → CLT 06:00AA 1903	1h 20m Charlotte	CLT 07:20 → IAD 08:50AA 5219 · flown by PSA	3h 48m	97%	83%
Delta Details →	RDU 07:30 → ATL 08:59DL 2478	3h 18m Atlanta	ATL 12:17 → IAD 14:02DL 2135	6h 32m	98%	83%
Delta Details →	RDU 05:20 → ATL 06:44DL 1552	3h 06m Atlanta	ATL 09:50 → IAD 11:39DL 1444	6h 18m	98%	81%
American Details →	RDU 06:41 → CLT 07:49AA 2420	3h 16m Charlotte	CLT 11:05 → IAD 12:38AA 5220 · flown by PSA	5h 57m	100%	81%
Delta Details →	RDU 09:54 → DTW 11:36DL 1427	3h 34m Detroit	DTW 15:10 → IAD 16:42DL 1787	6h 48m	100%	81%
Delta Details →	RDU 07:08 → JFK 09:00DL 5239 · flown by Endeavor	1h 16m New York	JFK 10:16 → IAD 11:48DL 5835 · flown by Republic	4h 40m	93%	75%
United Details →	RDU 08:05 → ORD 09:31UA 1297	1h 36m Chicago	ORD 11:07 → IAD 14:12UA 1869	6h 07m	87%	75%
Tight connection: often missed
American Details →	RDU 08:54 → CLT 10:19AA 2362	46m Charlotte	CLT 11:05 → IAD 12:38AA 5220 · flown by PSA	3h 44m	72%	58%
Frontier Details →	RDU 12:10 → ATL 13:51F9 1669	1h 04m Atlanta	ATL 14:55 → IAD 16:52F9 4410	4h 42m	71%	46%
Delta Details →	RDU 13:53 → JFK 15:50DL 5009 · flown by Endeavor	50m New York	JFK 16:40 → IAD 18:32DL 5076 · flown by Endeavor	4h 38m	65%	33%

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 20m · leaves 05:01 3%

ATL · 59m · leaves 05:20 5%

JFK · 1h 16m · leaves 07:08 7%

Afternoon and evening

ATL · 1h 11m · leaves 19:59 18%

JFK · 50m · leaves 13:53 35%

CLT · 46m · leaves 18:29 54%

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.


Delta DL 1388 RDU 05:33 → DTW United UA 3500 DTW 10:13 → IAD Connection details →	2h 55m	6h 17m	97%	89%
American AA 2420 RDU 06:41 → CLT United UA 4012 CLT 10:27 → IAD Connection details →	2h 38m	5h 14m	99%	84%
Delta DL 1552 RDU 05:20 → ATL United UA 632 ATL 09:25 → IAD Connection details →	2h 41m	5h 55m	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