Mon, Oct 5 has passed, so this is the 12-month record.

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 90-minute layover misses 6% of the time at 7 am and 1 time in 5 at 4 pm.

Nonstops (seasonal or thin)


Southwest	BUF	BNA	2h 00m	79%	0.8%	370	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	BUF 06:00 → ATL 08:10DL 2664	3h 11m Atlanta	ATL 11:21 → BNA 11:33DL 2867	6h 33m	99%	85%
Delta Details →	BUF 09:03 → DTW 10:18DL 3639 · flown by SkyWest	2h 07m Detroit	DTW 12:25 → BNA 13:06DL 1557	5h 03m	97%	85%
Southwest Details →	BUF 06:05 → BWI 07:20WN 756	2h 25m Baltimore	BWI 09:45 → BNA 10:35WN 487	5h 30m	100%	84%
Southwest Details →	BUF 06:25 → TPA 09:10WN 769	1h 50m Tampa	TPA 11:00 → BNA 11:55WN 4003	6h 30m	100%	82%
American Details →	BUF 05:20 → PHL 06:46AA 5873 · flown by Piedmont	2h 49m Philadelphia	PHL 09:35 → BNA 10:51AA 3221	6h 31m	98%	82%
JetBlue Details →	BUF 06:00 → BOS 07:27B6 716	3h 01m Boston	BOS 10:28 → BNA 12:17B6 1807	7h 17m	97%	79%
United Details →	BUF 07:00 → ORD 08:05UA 5820 · flown by SkyWest	2h 32m Chicago	ORD 10:37 → BNA 12:29UA 2414	6h 29m	100%	79%
American Details →	BUF 06:01 → CLT 08:01AA 1204	1h 04m Charlotte	CLT 09:05 → BNA 09:49AA 5083 · flown by PSA	4h 48m	94%	78%
Tight connection: often missed
American Details →	BUF 16:46 → DFW 19:10AA 1615	1h 02m Dallas-Fort Worth	DFW 20:12 → BNA 22:08AA 1500	6h 21m	60%	30%
American Details →	BUF 16:48 → ORD 18:03AA 4913 · flown by SkyWest	1h 37m Chicago	ORD 19:40 → BNA 21:25AA 6326 · flown by SkyWest	5h 37m	69%	30%
United Details →	BUF 18:04 → ORD 19:03UA 2747	54m Chicago	ORD 19:57 → BNA 21:45UA 2063	4h 41m	49%	23%

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

CLT · 1h 04m · leaves 06:01 6%

IAD · 1h 00m · leaves 10:34 12%

LGA · 1h 03m · leaves 06:02 14%

Afternoon and evening

MDW · 1h 10m · leaves 19:50 32%

DFW · 1h 02m · leaves 16:46 40%

ORD · 54m · leaves 18:04 51%

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 3668 BUF 06:00 → DCA Southwest WN 1426 DCA 10:35 → BNA Connection details →	3h 06m	6h 30m	100%	82%
American AA 2112 BUF 08:08 → ORD United UA 3634 ORD 12:29 → BNA Connection details →	3h 19m	7h 06m	93%	81%
Southwest WN 769 BUF 06:25 → TPA American AA 3825 TPA 11:55 → BNA Connection details →	2h 45m	7h 31m	100%	80%

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