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 75-minute layover misses 3% of the time at 6 am and 28% of the time at 10 pm.

Nonstops (seasonal or thin)


United	CMH	SFO	5h 06m	65%	0.6%	322	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach San Francisco on time. Total trip = scheduled departure to arrival, layover included (San Francisco is 3 h behind Columbus). Layovers up to 4 hours. Pick a connection for the details.


United Details →	CMH 10:30 → IAD 11:54UA 4056 · flown by Mesa	2h 57m Dulles	IAD 14:51 → SFO 17:38UA 2862	10h 08m	100%	82%
United Details →	CMH 05:30 → ORD 06:09UA 3524 · flown by Republic	1h 21m Chicago	ORD 07:30 → SFO 10:19UA 1116	7h 49m	97%	82%
United Details →	CMH 17:01 → IAH 19:04UA 4074 · flown by Mesa	2h 55m Houston	IAH 21:59 → SFO 00:05 +1UA 1609	10h 04m	97%	77%
American Details →	CMH 18:00 → LAX 19:44AA 1686	2h 48m Los Angeles	LAX 22:32 → SFO 23:59AA 6510 · flown by SkyWest	8h 59m	93%	75%
United Details →	CMH 11:43 → IAH 13:40UA 4065 · flown by Mesa	1h 50m Houston	IAH 15:30 → SFO 17:35UA 589	8h 52m	94%	75%
United Details →	CMH 09:00 → DEN 10:14UA 728	3h 11m Denver	DEN 13:25 → SFO 15:09UA 1812	9h 09m	97%	73%
United Details →	CMH 11:03 → ORD 11:39UA 622	2h 51m Chicago	ORD 14:30 → SFO 17:19UA 1577	9h 16m	100%	71%
Delta Details →	CMH 10:53 → MSP 11:55DL 2772	3h 12m Minneapolis	MSP 15:07 → SFO 17:14DL 756	9h 20m	98%	71%
Tight connection: often missed
American Details →	CMH 18:00 → LAX 19:44AA 1686	51m Los Angeles	LAX 20:35 → SFO 22:06AA 6260 · flown by SkyWest	7h 11m	68%	43%
United Details →	CMH 09:00 → ORD 09:36UA 466	49m Chicago	ORD 10:25 → SFO 13:14UA 543	7h 14m	63%	37%
American Details →	CMH 20:05 → DFW 21:48AA 2337	1h 11m Dallas-Fort Worth	DFW 22:59 → SFO 00:43 +1AA 446	7h 38m	72%	33%

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

DEN · 58m · leaves 05:45 4%

CLT · 1h 10m · leaves 09:16 6%

ATL · 1h 03m · leaves 07:05 6%

Afternoon and evening

MDW · 1h 08m · leaves 20:08 30%

BOS · 1h 05m · leaves 17:40 32%

LAX · 51m · leaves 18:00 32%

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 4642 CMH 06:00 → BOS United UA 1074 BOS 11:35 → SFO Connection details →	3h 29m	12h 02m	99%	78%
Delta DL 5663 CMH 06:00 → BOS JetBlue B6 1833 BOS 09:50 → SFO Connection details →	1h 37m	10h 25m	89%	73%
American AA 4808 CMH 09:09 → JFK Delta DL 679 JFK 14:55 → SFO Connection details →	3h 44m	12h 21m	98%	72%

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