Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No clear winner: American’s MDT → BOS flights land within a few points of 92% on time whatever the hour.

Nonstops (seasonal or thin)


American	MDT	BOS	1h 34m	92%	1.7%	358	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


American Details →	MDT 05:00 → CLT 06:44AA 6100 · flown by Piedmont	2h 11m Charlotte	CLT 08:55 → BOS 11:08AA 1533	6h 08m	95%	89%
American Details →	MDT 05:53 → ORD 07:14AA 4651 · flown by Republic	1h 16m Chicago	ORD 08:30 → BOS 12:07AA 4106 · flown by Envoy	6h 14m	100%	88%
American Details →	MDT 06:31 → CLT 08:20AA 5833 · flown by Piedmont	2h 58m Charlotte	CLT 11:18 → BOS 13:33AA 1611	7h 02m	97%	86%
United Details →	MDT 06:15 → IAD 07:13UA 4244 · flown by CommuteAir	1h 22m Dulles	IAD 08:35 → BOS 10:20UA 641	4h 05m	93%	83%
American Details →	MDT 06:45 → PHL 07:40AA 6013 · flown by Piedmont	2h 50m Philadelphia	PHL 10:30 → BOS 12:03AA 1416	5h 18m	98%	82%
Delta Details →	MDT 06:04 → ATL 08:05DL 1255	1h 55m Atlanta	ATL 10:00 → BOS 12:44DL 855	6h 40m	98%	81%
United Details →	MDT 06:30 → ORD 07:42UA 2684	1h 33m Chicago	ORD 09:15 → BOS 12:57UA 1117	6h 27m	94%	79%
Delta Details →	MDT 06:15 → DTW 07:52DL 4787 · flown by Endeavor	2h 13m Detroit	DTW 10:05 → BOS 12:05DL 2648	5h 48m	98%	79%
Tight connection: often missed
American Details →	MDT 06:45 → PHL 07:40AA 6013 · flown by Piedmont	47m Philadelphia	PHL 08:27 → BOS 09:56AA 2783	3h 11m	69%	59%
American Details →	MDT 15:30 → CLT 17:18AA 5832 · flown by Piedmont	1h 16m Charlotte	CLT 18:34 → BOS 20:59AA 2595	5h 29m	67%	39%

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

ORD · 1h 16m · leaves 05:53 0%

PHL · 1h 16m · leaves 10:36 0%

CLT · 1h 10m · leaves 08:24 7%

Afternoon and evening

IAD · 1h 13m · leaves 19:59 18%

CLT · 1h 16m · leaves 15:30 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 4651 MDT 05:53 → ORD United UA 1117 ORD 09:15 → BOS Connection details →	2h 01m	7h 04m	100%	85%
American AA 6100 MDT 05:00 → CLT Delta DL 5626 CLT 09:40 → BOS Connection details →	2h 56m	7h 08m	95%	80%
American AA 6013 MDT 06:45 → PHL Delta DL 5845 PHL 09:30 → BOS Connection details →	1h 50m	4h 14m	84%	73%

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