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

Nonstops


United	PWM	IAD	1h 56m	83%	2.1%	1,152	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 →	PWM 06:00 → ORD 08:00UA 723	3h 07m Chicago	ORD 11:07 → IAD 14:12UA 1869	8h 12m	100%	89%
Delta Details →	PWM 06:00 → ATL 08:45DL 1515	3h 32m Atlanta	ATL 12:17 → IAD 14:02DL 2135	8h 02m	99%	83%
Delta Details →	PWM 06:20 → JFK 07:44DL 5277 · flown by Endeavor	2h 32m New York	JFK 10:16 → IAD 11:48DL 5835 · flown by Republic	5h 28m	97%	78%
American Details →	PWM 07:16 → CLT 09:46AA 2966	1h 19m Charlotte	CLT 11:05 → IAD 12:38AA 5220 · flown by PSA	5h 22m	94%	77%
Delta Details →	PWM 13:55 → ATL 16:50DL 2479	2h 25m Atlanta	ATL 19:15 → IAD 21:03DL 1309	7h 09m	97%	72%
United Details →	PWM 06:00 → EWR 07:33UA 3604 · flown by Republic	2h 32m Newark	EWR 10:05 → IAD 11:28UA 1691	5h 28m	97%	65%
United Details →	PWM 10:55 → EWR 12:29UA 3405 · flown by Republic	2h 39m Newark	EWR 15:08 → IAD 16:32UA 1992	5h 37m	98%	64%
Delta Details →	PWM 16:45 → DTW 18:54DL 1821	2h 44m Detroit	DTW 21:38 → IAD 23:14DL 3988 · flown by SkyWest	6h 29m	94%	60%
Tight connection: often missed
United Details →	PWM 15:37 → DEN 18:16UA 287	57m Denver	DEN 19:13 → IAD 00:45 +1UA 1412	9h 08m	71%	52%
Delta Details →	PWM 18:59 → ATL 21:56DL 488	57m Atlanta	ATL 22:53 → IAD 00:44 +1DL 2549	5h 45m	67%	47%

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 19m · leaves 07:16 6%

ATL · 1h 05m · leaves 06:00 6%

Afternoon and evening

CLT · 1h 02m · leaves 14:25 23%

DEN · 57m · leaves 15:37 29%

ATL · 57m · leaves 18:59 33%

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 4391 PWM 06:09 → ORD United UA 1869 ORD 11:07 → IAD Connection details →	2h 47m	8h 03m	94%	81%
Delta DL 1766 PWM 11:48 → MSP United UA 3678 MSP 17:05 → IAD Connection details →	3h 15m	8h 55m	99%	81%
JetBlue B6 307 PWM 06:00 → JFK Delta DL 5835 JFK 10:16 → IAD Connection details →	2h 54m	5h 48m	98%	80%

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