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 DAL → CMH flights land within a few points of 72% on time whatever the hour.

Nonstops (seasonal or thin)


Southwest	DAL	CMH	2h 15m	72%	1.3%	537	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

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


Southwest + Unitedtwo ticketsDetails →	DAL 06:00 → DEN 07:00WN 1296	2h 35m Denver	DEN 09:35 → CMH 14:28UA 480	7h 28m	100%	92%
Southwest Details →	DAL 06:00 → MDW 08:15WN 1355	2h 50m Chicago	MDW 11:05 → CMH 13:15WN 114	6h 15m	100%	82%
Southwest + Deltatwo ticketsDetails →	DAL 06:00 → ATL 09:05WN 1261	3h 00m Atlanta	ATL 12:05 → CMH 13:38DL 1750	6h 40m	100%	80%
Southwest Details →	DAL 07:20 → STL 09:05WN 274	1h 00m St Louis	STL 10:05 → CMH 12:28WN 3902	4h 05m	84%	77%
Southwest Details →	DAL 06:10 → DCA 10:00WN 3351	1h 40m Washington	DCA 11:40 → CMH 13:00WN 1429	5h 50m	98%	76%
Southwest + Americantwo ticketsDetails →	DAL 06:15 → LGA 10:30WN 2182	2h 44m New York	LGA 13:14 → CMH 15:10AA 4394 · flown by Republic	7h 56m	98%	75%
Delta Details →	DAL 15:59 → ATL 19:14DL 512	2h 49m Atlanta	ATL 22:03 → CMH 23:01DL 1459	6h 42m	97%	75%
Southwest Details →	DAL 07:35 → AUS 08:40WN 1265	2h 15m Austin	AUS 10:55 → CMH 14:35WN 270	6h 00m	95%	75%
Tight connection: often missed
Southwest Details →	DAL 17:25 → STL 19:10WN 2921	1h 25m St Louis	STL 20:35 → CMH 22:55WN 4812	4h 30m	67%	35%
Southwest Details →	DAL 13:40 → BNA 15:30WN 526	1h 00m Nashville	BNA 16:30 → CMH 18:50WN 481	4h 10m	56%	23%
Southwest Details →	DAL 16:35 → LAS 17:25WN 1322	1h 05m Las Vegas	LAS 18:30 → CMH 01:25 +1WN 873	7h 50m	59%	22%

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

AUS · 55m · leaves 09:00 7%

ATL · 55m · leaves 06:05 12%

BNA · 1h 15m · leaves 07:05 16%

Afternoon and evening

ATL · 1h 05m · leaves 18:40 21%

LAS · 1h 05m · leaves 16:35 41%

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.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

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