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

Nonstops


United	IAD	MDT	1h 05m	83%	1.8%	1,107	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


American Details →	IAD 05:03 → CLT 06:35AA 5054 · flown by PSA	1h 05m Charlotte	CLT 07:40 → MDT 09:27AA 5836 · flown by Piedmont	4h 24m	94%	84%
Delta Details →	IAD 06:00 → DTW 07:40DL 3826 · flown by SkyWest	2h 30m Detroit	DTW 10:10 → MDT 11:42DL 4065 · flown by SkyWest	5h 42m	96%	84%
American Details →	IAD 06:33 → CLT 08:00AA 1216	3h 20m Charlotte	CLT 11:20 → MDT 13:12AA 6134 · flown by Piedmont	6h 39m	97%	82%
Delta Details →	IAD 06:00 → ATL 07:46DL 2127	1h 33m Atlanta	ATL 09:19 → MDT 11:11DL 1248	5h 11m	95%	80%
United Details →	IAD 06:10 → ORD 07:27UA 2070	3h 02m Chicago	ORD 10:29 → MDT 13:34UA 4798 · flown by SkyWest	7h 24m	100%	73%
American Details →	IAD 09:20 → CLT 10:57AA 5219 · flown by PSA	2h 15m Charlotte	CLT 13:12 → MDT 15:00AA 5832 · flown by Piedmont	5h 40m	93%	73%
Delta Details →	IAD 10:21 → ATL 12:05DL 1324	3h 36m Atlanta	ATL 15:41 → MDT 17:37DL 2857	7h 16m	97%	72%
Delta Details →	IAD 17:51 → ATL 19:54DL 1695	2h 05m Atlanta	ATL 21:59 → MDT 23:55DL 1283	6h 04m	91%	67%
Tight connection: often missed
United Details →	IAD 15:39 → ORD 17:02UA 1393	1h 23m Chicago	ORD 18:25 → MDT 21:29UA 1557	5h 50m	72%	40%
American Details →	IAD 13:08 → CLT 14:42AA 5220 · flown by PSA	48m Charlotte	CLT 15:30 → MDT 17:13AA 5275 · flown by PSA	4h 05m	69%	40%
American Details →	IAD 20:22 → CLT 21:55AA 1450	50m Charlotte	CLT 22:45 → MDT 00:25 +1AA 5217 · flown by PSA	4h 03m	44%	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

ATL · 58m · leaves 08:27 18%

ORD · 53m · leaves 08:15 22%

Afternoon and evening

CLT · 50m · leaves 20:22 34%

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 4015 IAD 08:35 → PHL American AA 5963 PHL 12:55 → MDT Connection details →	3h 10m	5h 25m	100%	82%
United UA 4063 IAD 08:15 → CLT American AA 5832 CLT 13:12 → MDT Connection details →	3h 27m	6h 45m	100%	79%
United UA 3541 IAD 12:55 → PHL American AA 5949 PHL 17:50 → MDT Connection details →	3h 40m	6h 02m	100%	77%

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