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

No clear winner: Delta’s MDT → ATL flights land within a few points of 85% on time whatever the hour.

Nonstops


Delta	MDT	ATL	2h 08m	85%	2.5%	1,083	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Atlanta 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 26m Charlotte	CLT 09:10 → ATL 10:41AA 5039 · flown by PSA	5h 41m	99%	84%
Delta Details →	MDT 06:15 → DTW 07:52DL 4787 · flown by Endeavor	2h 33m Detroit	DTW 10:25 → ATL 12:25DL 2856	6h 08m	98%	83%
United Details →	MDT 06:30 → ORD 07:42UA 2684	2h 47m Chicago	ORD 10:29 → ATL 13:44UA 2684	7h 14m	98%	82%
United Details →	MDT 06:15 → IAD 07:13UA 4244 · flown by CommuteAir	1h 02m Dulles	IAD 08:15 → ATL 10:14UA 2739	3h 59m	87%	76%
United Details →	MDT 10:30 → IAD 11:28UA 4974 · flown by CommuteAir	1h 07m Dulles	IAD 12:35 → ATL 14:34UA 471	4h 04m	89%	75%
American Details →	MDT 05:53 → ORD 07:14AA 4651 · flown by Republic	58m Chicago	ORD 08:12 → ATL 11:14AA 1363	5h 22m	97%	72%
United Details →	MDT 10:40 → ORD 11:56UA 4185 · flown by GoJet	1h 59m Chicago	ORD 13:55 → ATL 17:10UA 356	6h 30m	97%	71%
American Details →	MDT 06:45 → PHL 07:40AA 6013 · flown by Piedmont	2h 04m Philadelphia	PHL 09:44 → ATL 12:00AA 5461 · flown by PSA	5h 15m	92%	71%
Tight connection: often missed
United Details →	MDT 17:55 → ORD 19:05UA 2860	1h 04m Chicago	ORD 20:09 → ATL 23:30UA 2770	5h 35m	60%	38%
American Details →	MDT 17:43 → CLT 19:29AA 5275 · flown by PSA	1h 00m Charlotte	CLT 20:29 → ATL 21:52AA 5528 · flown by PSA	4h 08m	62%	29%

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 · 58m · leaves 05:53 3%

IAD · 1h 07m · leaves 10:30 11%

CLT · 50m · leaves 06:31 14%

Afternoon and evening

PHL · 1h 19m · leaves 19:38 24%

CLT · 1h 00m · leaves 17:43 38%

ORD · 1h 04m · leaves 17:55 40%

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 5833 MDT 06:31 → CLT Delta DL 3190 CLT 12:19 → ATL Connection details →	3h 59m	7h 10m	98%	84%
American AA 4651 MDT 05:53 → ORD United UA 2684 ORD 10:29 → ATL Connection details →	3h 15m	7h 51m	100%	84%
American AA 4714 MDT 07:00 → BOS Delta DL 385 BOS 10:20 → ATL Connection details →	1h 49m	6h 04m	97%	81%

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