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

No clear winner: Southwest’s BWI → BUF flights land within a few points of 78% on time whatever the hour.

Nonstops


Southwest	BWI	BUF	1h 15m	78%	1.9%	1,748	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


American Details →	BWI 06:15 → CLT 07:53AA 2670	3h 17m Charlotte	CLT 11:10 → BUF 12:54AA 1616	6h 40m	99%	86%
United Details →	BWI 10:32 → ORD 11:48UA 704	2h 07m Chicago	ORD 13:55 → BUF 16:41UA 2226	6h 09m	100%	82%
Delta Details →	BWI 05:40 → ATL 07:31DL 2950	1h 33m Atlanta	ATL 09:04 → BUF 11:09DL 1384	5h 29m	96%	82%
Delta Details →	BWI 11:35 → MSP 13:16DL 2357	2h 06m Minneapolis	MSP 15:22 → BUF 18:27DL 1749	6h 52m	99%	80%
Delta Details →	BWI 08:17 → ATL 10:15DL 2562	3h 45m Atlanta	ATL 14:00 → BUF 16:06DL 2266	7h 49m	99%	79%
Delta Details →	BWI 06:08 → DTW 07:40DL 2601	2h 25m Detroit	DTW 10:05 → BUF 11:24DL 3636 · flown by SkyWest	5h 16m	98%	75%
Delta Details →	BWI 11:52 → ATL 13:41DL 801	2h 52m Atlanta	ATL 16:33 → BUF 18:41DL 2050	6h 49m	99%	71%
United Details →	BWI 06:15 → ORD 07:30UA 709	2h 55m Chicago	ORD 10:25 → BUF 13:13UA 4382 · flown by GoJet	6h 58m	100%	71%
Tight connection: often missed
Southwest Details →	BWI 16:30 → MCO 19:00WN 176	55m Orlando	MCO 19:55 → BUF 22:38WN 4832	6h 07m	40%	16%

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

CLT · 1h 18m · leaves 13:55 19%

ATL · 1h 15m · leaves 18:24 22%

MCO · 55m · leaves 16:30 60%

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 883 BWI 06:38 → BOS JetBlue B6 1215 BOS 11:05 → BUF Connection details →	2h 57m	5h 58m	100%	91%
Delta DL 5703 BWI 09:00 → BOS American AA 4440 BOS 13:55 → BUF Connection details →	3h 16m	6h 44m	97%	83%
Southwest WN 3931 BWI 08:20 → ATL Delta DL 2266 ATL 14:00 → BUF Connection details →	3h 40m	7h 46m	98%	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