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

No clear winner: United’s BUF → EWR flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops


United	BUF	EWR	1h 31m	80%	5.2%	1,066	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Newark on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


American Details →	BUF 06:01 → CLT 08:01AA 1204	2h 42m Charlotte	CLT 10:43 → EWR 12:37AA 1819	6h 36m	98%	83%
Delta Details →	BUF 06:00 → ATL 08:10DL 2664	1h 53m Atlanta	ATL 10:03 → EWR 12:24DL 2401	6h 24m	97%	79%
Delta Details →	BUF 06:29 → DTW 07:42DL 2898	2h 33m Detroit	DTW 10:15 → EWR 11:59DL 2577	5h 30m	98%	77%
United Details →	BUF 06:15 → IAD 07:34UA 3668 · flown by Republic	55m Dulles	IAD 08:29 → EWR 09:55UA 2396	3h 40m	90%	74%
United Details →	BUF 07:00 → ORD 08:05UA 5820 · flown by SkyWest	2h 46m Chicago	ORD 10:51 → EWR 14:17UA 1856	7h 17m	100%	73%
Delta Details →	BUF 09:03 → DTW 10:18DL 3639 · flown by SkyWest	3h 52m Detroit	DTW 14:10 → EWR 15:59DL 2573	6h 56m	100%	68%
American Details →	BUF 13:47 → CLT 15:49AA 1616	2h 32m Charlotte	CLT 18:21 → EWR 20:30AA 1071	6h 43m	99%	64%
United Details →	BUF 19:52 → IAD 21:15UA 4270 · flown by CommuteAir	1h 14m Dulles	IAD 22:29 → EWR 23:59UA 1997	4h 07m	87%	63%
Tight connection: often missed
Delta Details →	BUF 12:04 → DTW 13:23DL 3636 · flown by SkyWest	47m Detroit	DTW 14:10 → EWR 15:59DL 2573	3h 55m	69%	46%
United Details →	BUF 18:04 → ORD 19:03UA 2747	1h 04m Chicago	ORD 20:07 → EWR 23:39UA 759	5h 35m	68%	41%
American Details →	BUF 13:47 → CLT 15:49AA 1616	54m Charlotte	CLT 16:43 → EWR 18:39AA 1811	4h 52m	65%	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

ORD · 1h 00m · leaves 08:08 16%

Afternoon and evening

ATL · 56m · leaves 19:24 25%

ORD · 1h 04m · leaves 18:04 32%

CLT · 54m · leaves 13:47 35%

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 769 BUF 06:25 → TPA United UA 2858 TPA 10:57 → EWR Connection details →	1h 47m	7h 23m	100%	86%
American AA 1204 BUF 06:01 → CLT United UA 3448 CLT 11:10 → EWR Connection details →	3h 09m	7h 15m	98%	83%
American AA 3668 BUF 06:00 → DCA United UA 4508 DCA 11:00 → EWR Connection details →	3h 31m	6h 22m	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