Sun, Oct 4 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

No clear winner: Southwest’s ROC → MDW flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops (seasonal or thin)


Southwest	ROC	MDW	1h 50m	79%	1.6%	496	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	ROC 06:00 → ATL 08:12DL 1200	2h 53m Atlanta	ATL 11:05 → MDW 12:05DL 2417	7h 05m	98%	82%
Delta Details →	ROC 09:55 → DTW 11:18DL 5240 · flown by Endeavor	1h 07m Detroit	DTW 12:25 → MDW 12:46DL 4688 · flown by Endeavor	3h 51m	92%	74%
Delta Details →	ROC 06:10 → DTW 07:28DL 2495	1h 22m Detroit	DTW 08:50 → MDW 09:14DL 4684 · flown by Endeavor	4h 04m	100%	68%
Southwest Details →	ROC 06:10 → BWI 07:25WN 4680	2h 10m Baltimore	BWI 09:35 → MDW 10:35WN 4217	5h 25m	98%	66%
Southwest Details →	ROC 12:30 → BWI 13:45WN 3458	2h 43m Baltimore	BWI 16:28 → MDW 17:32WN 997	6h 03m	100%	62%
Southwest Details →	ROC 17:50 → BWI 19:10WN 4354	1h 45m Baltimore	BWI 20:55 → MDW 22:00WN 999	5h 10m	91%	24%

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

DTW · 1h 07m · leaves 09:55 8%

ATL · 57m · leaves 06:00 16%

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 5930 ROC 06:05 → PHL Southwest WN 3224 PHL 11:22 → MDW Connection details →	3h 50m	7h 27m	98%	84%
Delta DL 5311 ROC 06:00 → LGA Southwest WN 4573 LGA 10:55 → MDW Connection details →	3h 36m	7h 15m	95%	78%
American AA 5351 ROC 05:33 → DCA Southwest WN 1444 DCA 09:25 → MDW Connection details →	2h 26m	5h 47m	94%	77%

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