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

Connect in the morning. The same one-hour layover misses 14% of the time at 10 am and 58% of the time at 7 pm.

Nonstops


United	IAD	CMH	1h 27m	83%	1.2%	1,475	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	IAD 06:00 → DTW 07:40DL 3826 · flown by SkyWest	2h 35m Detroit	DTW 10:15 → CMH 11:27DL 5810 · flown by Republic	5h 27m	96%	90%
United Details →	IAD 06:33 → EWR 07:52UA 2147	2h 46m Newark	EWR 10:38 → CMH 12:33UA 3638 · flown by Republic	6h 00m	100%	86%
United Details →	IAD 08:15 → ORD 09:36UA 1775	3h 12m Chicago	ORD 12:48 → CMH 15:28UA 3554 · flown by Republic	7h 13m	100%	84%
Delta Details →	IAD 17:29 → DTW 19:07DL 1787	3h 43m Detroit	DTW 22:50 → CMH 23:56DL 5634 · flown by Republic	6h 27m	96%	83%
Delta Details →	IAD 06:00 → ATL 07:46DL 2127	2h 24m Atlanta	ATL 10:10 → CMH 11:48DL 1522	5h 48m	97%	83%
United Details →	IAD 08:40 → IAH 10:59UA 1524	1h 16m Houston	IAH 12:15 → CMH 16:05UA 4072 · flown by Mesa	7h 25m	93%	82%
Delta Details →	IAD 06:00 → MSP 07:55DL 3996 · flown by SkyWest	2h 19m Minneapolis	MSP 10:14 → CMH 13:08DL 2550	7h 08m	95%	81%
Delta Details →	IAD 10:21 → ATL 12:05DL 1324	2h 20m Atlanta	ATL 14:25 → CMH 15:59DL 2200	5h 39m	96%	80%
Tight connection: often missed
Delta Details →	IAD 17:29 → DTW 19:07DL 1787	47m Detroit	DTW 19:54 → CMH 21:04DL 5838 · flown by Republic	3h 35m	66%	52%
United Details →	IAD 17:42 → ORD 18:50UA 2497	55m Chicago	ORD 19:45 → CMH 22:24UA 3614 · flown by Republic	4h 42m	42%	29%

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

IAH · 1h 16m · leaves 08:40 7%

ORD · 55m · leaves 10:31 10%

DTW · 1h 00m · leaves 06:00 14%

Afternoon and evening

DTW · 47m · leaves 17:29 34%

ORD · 55m · leaves 17:42 58%

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.


United UA 641 IAD 08:35 → BOS American AA 3470 BOS 12:40 → CMH Connection details →	2h 20m	6h 21m	96%	84%
United UA 6246 IAD 17:22 → DTW Delta DL 5634 DTW 22:50 → CMH Connection details →	3h 48m	6h 34m	97%	84%
United UA 6137 IAD 08:35 → DTW Delta DL 5774 DTW 12:18 → CMH Connection details →	2h 04m	4h 52m	92%	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