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 ATL → BHM flights land within a few points of 84% on time whatever the hour.

Nonstops


Delta	ATL	BHM	55m	84%	1.8%	3,337	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Birmingham on time. Total trip = scheduled departure to arrival, layover included (Birmingham is 1 h behind Atlanta). Layovers up to 4 hours. Pick a connection for the details.


United Details →	ATL 11:37 → IAH 12:47UA 425	1h 38m Houston	IAH 14:25 → BHM 16:20UA 6120 · flown by Mesa	5h 43m	96%	87%
American Details →	ATL 06:01 → DFW 07:33AA 2770	2h 17m Dallas-Fort Worth	DFW 09:50 → BHM 11:46AA 3469 · flown by Envoy	6h 45m	98%	84%
Southwest Details →	ATL 06:30 → DAL 07:35WN 192	2h 15m Dallas	DAL 09:50 → BHM 11:30WN 1271	6h 00m	100%	81%
Delta Details →	ATL 11:00 → DTW 12:55DL 1240	2h 56m Detroit	DTW 15:51 → BHM 16:55DL 4647 · flown by Endeavor	6h 55m	99%	80%
American Details →	ATL 06:24 → CLT 07:55AA 5176 · flown by PSA	3h 35m Charlotte	CLT 11:30 → BHM 12:09AA 4932 · flown by SkyWest	6h 45m	97%	80%
Southwest Details →	ATL 07:10 → BNA 07:15WN 179	3h 30m Nashville	BNA 10:45 → BHM 11:40WN 434	5h 30m	96%	71%
Delta Details →	ATL 15:28 → DTW 17:28DL 1005	2h 17m Detroit	DTW 19:45 → BHM 20:39DL 3145	6h 16m	96%	71%
United Details →	ATL 15:57 → IAH 17:23UA 3992 · flown by Mesa	2h 32m Houston	IAH 19:55 → BHM 21:53UA 4022 · flown by Mesa	6h 56m	93%	69%
Tight connection: often missed
American Details →	ATL 19:00 → MIA 21:00AA 1367	1h 56m Miami	MIA 22:56 → BHM 23:59AA 3427 · flown by Envoy	5h 59m	69%	58%
American Details →	ATL 15:06 → CLT 16:36AA 5041 · flown by PSA	56m Charlotte	CLT 17:32 → BHM 18:08AA 5077 · flown by PSA	4h 03m	51%	26%
Southwest Details →	ATL 14:10 → DAL 15:20WN 194	1h 05m Dallas	DAL 16:25 → BHM 18:05WN 4389	4h 55m	65%	24%

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.

Afternoon and evening

ORD · 1h 00m · leaves 19:04 37%

CLT · 56m · leaves 15:06 49%

DFW · 1h 02m · leaves 17:34 56%

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.


Delta DL 3144 ATL 07:38 → CLT American AA 4932 CLT 11:30 → BHM Connection details →	2h 37m	5h 31m	96%	82%
Delta DL 1147 ATL 09:02 → ORD American AA 3971 ORD 13:01 → BHM Connection details →	2h 48m	6h 59m	97%	79%
Delta DL 1572 ATL 12:30 → IAH United UA 4256 IAH 16:20 → BHM Connection details →	2h 42m	6h 48m	98%	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