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

Nonstops (seasonal or thin)


United	DAY	IAD	1h 33m	84%	1.6%	950	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 →	DAY 05:40 → ORD 05:55UA 4415 · flown by GoJet	2h 45m Chicago	ORD 08:40 → IAD 11:52UA 2277	6h 12m	100%	92%
United Details →	DAY 07:15 → ORD 07:55UA 4402 · flown by GoJet	3h 12m Chicago	ORD 11:07 → IAD 14:12UA 1869	6h 57m	94%	82%
Delta Details →	DAY 06:00 → ATL 07:42DL 3140	2h 08m Atlanta	ATL 09:50 → IAD 11:39DL 1444	5h 38m	97%	80%
American Details →	DAY 06:31 → CLT 08:20AA 5234 · flown by PSA	2h 45m Charlotte	CLT 11:05 → IAD 12:38AA 5220 · flown by PSA	6h 07m	96%	77%
Delta Details →	DAY 11:23 → ATL 13:03DL 3108	1h 56m Atlanta	ATL 14:59 → IAD 16:47DL 1695	5h 24m	97%	73%
Delta Details →	DAY 15:56 → ATL 17:40DL 2763	1h 35m Atlanta	ATL 19:15 → IAD 21:03DL 1309	5h 08m	93%	68%
Delta Details →	DAY 18:38 → ATL 20:29DL 3088	2h 24m Atlanta	ATL 22:53 → IAD 00:44 +1DL 2549	6h 06m	95%	68%
United Details →	DAY 11:39 → ORD 12:05UA 4453 · flown by GoJet	3h 48m Chicago	ORD 15:53 → IAD 19:02UA 2437	7h 23m	96%	65%
Tight connection: often missed
United Details →	DAY 14:23 → ORD 14:55UA 4747 · flown by SkyWest	58m Chicago	ORD 15:53 → IAD 19:02UA 2437	4h 39m	63%	42%
American Details →	DAY 17:57 → CLT 19:45AA 5158 · flown by PSA	46m Charlotte	CLT 20:31 → IAD 22:05AA 5549 · flown by PSA	4h 08m	49%	25%

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 · 46m · leaves 08:30 17%

Afternoon and evening

CLT · 46m · leaves 17:57 51%

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 3685 DAY 08:17 → ORD United UA 1869 ORD 11:07 → IAD Connection details →	2h 17m	5h 55m	96%	86%
American AA 5587 DAY 05:50 → PHL United UA 6235 PHL 10:39 → IAD Connection details →	3h 06m	6h 05m	100%	78%
American AA 5234 DAY 06:31 → CLT United UA 4012 CLT 10:27 → IAD Connection details →	2h 07m	5h 24m	93%	78%

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