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

Connect in the morning. The same one-hour layover misses 5% of the time at 8 am and 29% of the time at 4 pm.

Nonstops


Delta	BUF	ATL	2h 17m	84%	2.0%	1,249	Flying now
Frontier	BUF	ATL	2h 25m	64%	3.0%	270	Flying now
Southwest	BUF	ATL	–	100%few flights	0.0%	1	Not 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.


Southwest Details →	BUF 06:05 → BWI 07:20WN 756	1h 00m Baltimore	BWI 08:20 → ATL 10:20WN 3931	4h 13m	97%	89%
Delta Details →	BUF 10:00 → JFK 11:24DL 5426 · flown by Endeavor	1h 46m New York	JFK 13:10 → ATL 15:45DL 2342	5h 45m	98%	83%
United Details →	BUF 07:00 → ORD 08:05UA 5820 · flown by SkyWest	2h 24m Chicago	ORD 10:29 → ATL 13:44UA 2684	6h 44m	100%	83%
Delta Details →	BUF 06:29 → DTW 07:42DL 2898	2h 43m Detroit	DTW 10:25 → ATL 12:25DL 2856	5h 54m	98%	83%
American Details →	BUF 06:01 → CLT 08:01AA 1204	1h 09m Charlotte	CLT 09:10 → ATL 10:41AA 5039 · flown by PSA	4h 40m	95%	82%
Delta Details →	BUF 07:00 → JFK 08:30DL 5284 · flown by Endeavor	2h 30m New York	JFK 11:00 → ATL 13:33DL 1029	6h 28m	97%	79%
Delta Details →	BUF 06:05 → LGA 07:30DL 4670 · flown by Endeavor	3h 29m New York	LGA 10:59 → ATL 13:20DL 993	7h 15m	99%	78%
American Details →	BUF 06:00 → DCA 07:29AA 3668 · flown by Envoy	51m Washington	DCA 08:20 → ATL 10:27AA 3976 · flown by Envoy	4h 27m	93%	76%
Tight connection: often missed
Delta Details →	BUF 16:01 → DTW 17:19DL 3642 · flown by SkyWest	50m Detroit	DTW 18:09 → ATL 20:19DL 2053	4h 18m	73%	54%
American Details →	BUF 13:47 → CLT 15:49AA 1616	57m Charlotte	CLT 16:46 → ATL 18:14AA 5040 · flown by PSA	4h 27m	70%	31%
American Details →	BUF 17:25 → DCA 18:59AA 5106 · flown by PSA	1h 00m Washington	DCA 19:59 → ATL 22:03AA 5502 · flown by PSA	4h 36m	42%	18%

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

BWI · 1h 00m · leaves 06:05 3%

CLT · 1h 09m · leaves 06:01 5%

LGA · 1h 16m · leaves 10:20 7%

Afternoon and evening

LGA · 51m · leaves 18:10 46%

ORD · 56m · leaves 16:48 46%

DCA · 1h 00m · leaves 17:25 58%

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 756 BUF 06:05 → BWI Delta DL 1592 BWI 10:33 → ATL Connection details →	3h 13m	6h 19m	100%	88%
Southwest WN 769 BUF 06:25 → TPA Delta DL 1227 TPA 11:14 → ATL Connection details →	2h 04m	6h 29m	100%	85%
Southwest WN 4154 BUF 07:35 → MDW Delta DL 1063 MDW 11:05 → ATL Connection details →	2h 50m	6h 26m	100%	84%

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