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 BUF → BWI flights land within a few points of 87% on time whatever the hour.

Nonstops


Southwest	BUF	BWI	1h 15m	87%	1.4%	1,750	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	BUF 06:25 → TPA 09:10WN 769	1h 30m Tampa	TPA 10:40 → BWI 13:00WN 1016	6h 35m	100%	88%
Delta Details →	BUF 06:00 → ATL 08:10DL 2664	3h 00m Atlanta	ATL 11:10 → BWI 13:03DL 2711	7h 03m	99%	85%
Delta Details →	BUF 06:29 → DTW 07:42DL 2898	2h 28m Detroit	DTW 10:10 → BWI 11:47DL 1546	5h 18m	98%	83%
United Details →	BUF 07:00 → ORD 08:05UA 5820 · flown by SkyWest	2h 46m Chicago	ORD 10:51 → BWI 13:57UA 2653	6h 57m	100%	80%
Delta Details →	BUF 17:12 → ATL 19:25DL 2266	3h 20m Atlanta	ATL 22:45 → BWI 00:40 +1DL 2590	7h 28m	98%	74%
American Details →	BUF 06:01 → CLT 08:01AA 1204	3h 34m Charlotte	CLT 11:35 → BWI 13:03AA 846	7h 02m	98%	74%
Delta Details →	BUF 12:04 → DTW 13:23DL 3636 · flown by SkyWest	1h 46m Detroit	DTW 15:09 → BWI 16:45DL 2480	4h 41m	93%	72%
Southwest Details →	BUF 07:35 → MDW 08:15WN 4154	3h 45m Chicago	MDW 12:00 → BWI 14:50WN 2744	7h 15m	100%	67%
Tight connection: often missed
American Details →	BUF 19:35 → CLT 21:36AA 1614	1h 09m Charlotte	CLT 22:45 → BWI 00:14 +1AA 1318	4h 39m	70%	50%
Frontier Details →	BUF 12:29 → ATL 14:49F9 1407	1h 17m Atlanta	ATL 16:06 → BWI 18:09F9 1080	5h 39m	73%	49%
Southwest Details →	BUF 16:40 → DEN 18:15WN 3413	50m Denver	DEN 19:05 → BWI 00:35 +1WN 1500	7h 53m	12%	3%

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

ATL · 1h 01m · leaves 19:24 21%

CLT · 1h 09m · leaves 19:35 30%

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 2664 BUF 06:00 → ATL Southwest WN 186 ATL 10:15 → BWI Connection details →	2h 05m	6h 10m	94%	80%
American AA 1195 BUF 06:00 → ORD United UA 2653 ORD 10:51 → BWI Connection details →	3h 48m	7h 57m	97%	77%
JetBlue B6 716 BUF 06:00 → BOS Delta DL 5668 BOS 11:09 → BWI Connection details →	3h 42m	6h 49m	97%	75%

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