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 CMH → MDW flights land within a few points of 82% on time whatever the hour.

Nonstops


Southwest	CMH	MDW	1h 15m	82%	1.6%	1,239	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 Columbus). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	CMH 07:12 → STL 07:38WN 1207	1h 17m St Louis	STL 08:55 → MDW 10:00WN 2570	3h 48m	100%	88%
Southwest Details →	CMH 06:50 → BNA 07:10WN 4477	2h 10m Nashville	BNA 09:20 → MDW 11:00WN 1473	5h 10m	100%	88%
Southwest Details →	CMH 05:10 → MCO 07:20WN 1193	55m Orlando	MCO 08:15 → MDW 10:00WN 1340	5h 50m	94%	83%
Delta Details →	CMH 07:05 → ATL 08:42DL 2909	2h 23m Atlanta	ATL 11:05 → MDW 12:05DL 2417	6h 00m	98%	83%
Delta Details →	CMH 08:04 → DTW 09:15DL 5812 · flown by Republic	3h 10m Detroit	DTW 12:25 → MDW 12:46DL 4688 · flown by Endeavor	5h 42m	100%	80%
Southwest Details →	CMH 06:05 → FLL 08:35WN 426	1h 40m Fort Lauderdale	FLL 10:15 → MDW 12:15WN 1869	7h 10m	100%	80%
Delta Details →	CMH 06:00 → ATL 07:36DL 2469	1h 33m Atlanta	ATL 09:09 → MDW 10:09DL 1063	5h 09m	96%	80%
Southwest Details →	CMH 06:35 → DAL 08:05WN 4324	2h 00m Dallas	DAL 10:05 → MDW 12:20WN 1357	6h 45m	98%	79%

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

STL · 1h 17m · leaves 07:12 0%

TPA · 1h 00m · leaves 07:35 4%

DTW · 1h 11m · leaves 06:30 4%

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 3217 CMH 08:03 → CLT Southwest WN 4529 CLT 11:35 → MDW Connection details →	1h 55m	5h 32m	90%	86%
Delta DL 2469 CMH 06:00 → ATL Southwest WN 224 ATL 10:00 → MDW Connection details →	2h 24m	6h 00m	96%	84%
Delta DL 5700 CMH 06:07 → LGA Southwest WN 4573 LGA 10:55 → MDW Connection details →	2h 56m	7h 08m	99%	82%

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