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 6% of the time at 9 am and 62% of the time at 7 pm.

Nonstops


American	CVG	BOS	2h 13m	83%	2.1%	609	Flying now
Delta	CVG	BOS	2h 20m	80%	3.6%	1,390	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


American Details →	CVG 05:08 → CLT 06:35AA 429	2h 20m Charlotte	CLT 08:55 → BOS 11:08AA 1533	6h 00m	96%	92%
Delta Details →	CVG 05:34 → ATL 07:04DL 2441	1h 31m Atlanta	ATL 08:35 → BOS 11:14DL 2432	5h 40m	99%	90%
Southwest Details →	CVG 08:00 → MDW 08:05WN 3016	1h 05m Chicago	MDW 09:10 → BOS 12:28WN 1405	4h 28m	98%	90%
United Details →	CVG 06:00 → ORD 06:36UA 5618 · flown by SkyWest	2h 39m Chicago	ORD 09:15 → BOS 12:57UA 1117	6h 57m	100%	87%
American Details →	CVG 07:42 → CLT 09:16AA 2967	2h 02m Charlotte	CLT 11:18 → BOS 13:33AA 1611	5h 51m	99%	84%
American Details →	CVG 06:00 → ORD 06:32AA 4094 · flown by Envoy	1h 58m Chicago	ORD 08:30 → BOS 12:07AA 4106 · flown by Envoy	6h 07m	93%	84%
Delta Details →	CVG 07:05 → ATL 08:39DL 2302	1h 21m Atlanta	ATL 10:00 → BOS 12:44DL 855	5h 39m	97%	83%
Delta Details →	CVG 06:30 → EWR 08:29DL 5069 · flown by Endeavor	1h 01m Newark	EWR 09:30 → BOS 10:55DL 5764 · flown by Republic	4h 25m	90%	82%
Tight connection: often missed
Delta Details →	CVG 12:35 → DCA 14:04DL 5221 · flown by Endeavor	1h 11m Washington	DCA 15:15 → BOS 17:02DL 5600 · flown by Republic	4h 29m	72%	41%
Delta Details →	CVG 17:31 → EWR 19:33DL 5083 · flown by Endeavor	1h 07m Newark	EWR 20:40 → BOS 22:13DL 5718 · flown by Republic	4h 42m	71%	40%
United Details →	CVG 18:12 → ORD 18:50UA 1813	55m Chicago	ORD 19:45 → BOS 23:21UA 1032	5h 09m	38%	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

MDW · 1h 05m · leaves 08:00 2%

JFK · 1h 00m · leaves 06:45 6%

LGA · 1h 01m · leaves 06:00 7%

Afternoon and evening

EWR · 1h 07m · leaves 17:31 29%

PHL · 1h 03m · leaves 17:56 33%

ORD · 55m · leaves 18:12 62%

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 5618 CVG 06:00 → ORD American AA 4106 ORD 08:30 → BOS Connection details →	1h 54m	6h 07m	96%	88%
American AA 429 CVG 05:08 → CLT Delta DL 5626 CLT 09:40 → BOS Connection details →	3h 05m	7h 00m	96%	82%
Delta DL 5069 CVG 06:30 → EWR United UA 1669 EWR 11:59 → BOS Connection details →	3h 30m	6h 46m	99%	81%

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