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 ROC → IAD flights land within a few points of 84% on time whatever the hour.

Nonstops


United	ROC	IAD	1h 23m	84%	2.7%	1,258	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.


United Details →	ROC 06:20 → ORD 07:28UA 1778	3h 39m Chicago	ORD 11:07 → IAD 14:12UA 1869	7h 52m	97%	84%
Delta Details →	ROC 06:10 → DTW 07:28DL 2495	1h 22m Detroit	DTW 08:50 → IAD 10:23DL 2884	4h 15m	100%	82%
Delta Details →	ROC 09:55 → DTW 11:18DL 5240 · flown by Endeavor	3h 52m Detroit	DTW 15:10 → IAD 16:42DL 1787	6h 47m	99%	82%
Delta Details →	ROC 06:00 → ATL 08:12DL 1200	1h 38m Atlanta	ATL 09:50 → IAD 11:39DL 1444	5h 38m	96%	79%
Delta Details →	ROC 05:30 → JFK 06:59DL 5318 · flown by Endeavor	3h 17m New York	JFK 10:16 → IAD 11:48DL 5835 · flown by Republic	6h 18m	97%	78%
United Details →	ROC 10:42 → ORD 11:53UA 3507 · flown by Republic	1h 37m Chicago	ORD 13:30 → IAD 16:30UA 2794	5h 48m	100%	76%
Delta Details →	ROC 18:21 → ATL 20:35DL 2047	2h 18m Atlanta	ATL 22:53 → IAD 00:44 +1DL 2549	6h 23m	95%	69%
United Details →	ROC 06:00 → EWR 07:20UA 3626 · flown by Republic	2h 45m Newark	EWR 10:05 → IAD 11:28UA 1691	5h 28m	98%	65%
Tight connection: often missed
United Details →	ROC 19:10 → EWR 20:30UA 4385 · flown by GoJet	1h 20m Newark	EWR 21:50 → IAD 23:19UA 1784	4h 09m	52%	32%

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 4247 ROC 05:00 → ORD United UA 2277 ORD 08:40 → IAD Connection details →	2h 46m	6h 52m	100%	92%
Delta DL 1752 ROC 06:16 → DTW United UA 3500 DTW 10:13 → IAD Connection details →	2h 39m	5h 34m	97%	90%
American AA 1058 ROC 05:00 → CLT United UA 4012 CLT 10:27 → IAD Connection details →	3h 33m	6h 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