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 BHM → ATL flights land within a few points of 88% on time whatever the hour.

Nonstops


Delta	BHM	ATL	1h 07m	88%	1.8%	3,338	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 (Atlanta is 1 h ahead of Birmingham). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	BHM 05:00 → MDW 06:50WN 442	2h 05m Chicago	MDW 08:55 → ATL 11:45WN 4154	5h 45m	100%	86%
Delta Details →	BHM 06:25 → DTW 09:27DL 3006	58m Detroit	DTW 10:25 → ATL 12:25DL 2856	4h 58m	93%	79%
American Details →	BHM 05:06 → CLT 07:35AA 3269	1h 35m Charlotte	CLT 09:10 → ATL 10:41AA 5039 · flown by PSA	4h 35m	94%	78%
Southwest Details →	BHM 06:15 → DAL 08:00WN 239	1h 30m Dallas	DAL 09:30 → ATL 12:35WN 1766	5h 20m	98%	77%
United Details →	BHM 06:30 → IAH 08:30UA 4008 · flown by Mesa	3h 25m Houston	IAH 11:55 → ATL 15:16UA 4079 · flown by Mesa	7h 46m	99%	77%
Delta Details →	BHM 10:22 → DTW 13:30DL 3685 · flown by SkyWest	2h 30m Detroit	DTW 16:00 → ATL 18:04DL 1467	6h 42m	96%	74%
Delta Details →	BHM 06:00 → LGA 09:29DL 4977 · flown by Endeavor	1h 30m New York	LGA 10:59 → ATL 13:20DL 993	6h 20m	94%	73%
American Details →	BHM 05:00 → DFW 07:13AA 4127 · flown by Envoy	2h 21m Dallas-Fort Worth	DFW 09:34 → ATL 12:46AA 1358	6h 46m	96%	69%
Tight connection: often missed
United Details →	BHM 07:18 → ORD 09:41UA 4449 · flown by GoJet	48m Chicago	ORD 10:29 → ATL 13:44UA 2684	5h 26m	74%	63%
American Details →	BHM 17:47 → PHL 21:07AA 5064 · flown by PSA	51m Philadelphia	PHL 21:58 → ATL 00:15 +1AA 443	5h 28m	59%	39%
American Details →	BHM 18:42 → CLT 21:27AA 5077 · flown by PSA	1h 09m Charlotte	CLT 22:36 → ATL 23:58AA 5498 · flown by PSA	4h 16m	54%	36%

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

DTW · 58m · leaves 06:25 7%

DFW · 1h 05m · leaves 06:18 17%

ORD · 48m · leaves 07:18 26%

Afternoon and evening

ORD · 59m · leaves 15:37 22%

PHL · 51m · leaves 17:47 41%

CLT · 1h 09m · leaves 18:42 46%

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.


Southwest WN 430 BHM 05:30 → BNA Delta DL 3069 BNA 09:48 → ATL Connection details →	3h 18m	5h 31m	98%	85%
Southwest WN 440 BHM 06:50 → MCO Delta DL 664 MCO 13:05 → ATL Connection details →	3h 40m	6h 59m	100%	81%
American AA 5218 BHM 06:00 → PHL Delta DL 2270 PHL 12:02 → ATL Connection details →	2h 42m	7h 06m	95%	79%

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