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 70-minute layover misses 1% of the time at 9 am and 1 time in 5 at 9 pm.

Nonstops (seasonal or thin)


Delta	MCI	BOS	3h 08m	76%	3.1%	589	Flying now
Southwest	MCI	BOS	3h 00m	46%	0.0%	57	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 (Boston is 1 h ahead of Kansas City). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	MCI 06:15 → MDW 07:40WN 2569	1h 30m Chicago	MDW 09:10 → BOS 12:28WN 1405	5h 13m	100%	92%
American Details →	MCI 05:30 → ORD 07:31AA 3845 · flown by Envoy	59m Chicago	ORD 08:30 → BOS 12:07AA 4106 · flown by Envoy	5h 37m	97%	88%
American Details →	MCI 06:31 → CLT 10:00AA 1297	1h 18m Charlotte	CLT 11:18 → BOS 13:33AA 1611	6h 02m	97%	86%
Southwest Details →	MCI 05:15 → MDW 06:40WN 4276	1h 00m Chicago	MDW 07:40 → BOS 10:55WN 4611	4h 40m	93%	83%
Delta Details →	MCI 05:38 → ATL 08:44DL 1204	1h 16m Atlanta	ATL 10:00 → BOS 12:44DL 855	6h 06m	99%	83%
Southwest Details →	MCI 06:55 → DEN 07:45WN 2546	2h 15m Denver	DEN 10:00 → BOS 16:05WN 3690	8h 10m	100%	83%
United Details →	MCI 06:00 → DEN 06:56UA 355	2h 44m Denver	DEN 09:40 → BOS 15:44UA 1232	8h 44m	98%	82%
United Details →	MCI 06:05 → EWR 09:58UA 1969	2h 01m Newark	EWR 11:59 → BOS 13:16UA 1669	6h 11m	99%	80%
Tight connection: often missed
Southwest Details →	MCI 17:30 → BNA 19:05WN 4269	1h 30m Nashville	BNA 20:35 → BOS 00:55 +1WN 459	5h 40m	74%	32%
American Details →	MCI 09:45 → DFW 11:30AA 2050	47m Dallas-Fort Worth	DFW 12:17 → BOS 17:07AA 1577	6h 21m	58%	31%
Southwest Details →	MCI 16:15 → DEN 17:05WN 2549	2h 00m Denver	DEN 19:05 → BOS 01:00 +1WN 1494	7h 45m	67%	11%

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

ATL · 1h 16m · leaves 05:38 1%

CLT · 1h 18m · leaves 06:31 3%

SLC · 1h 05m · leaves 07:02 5%

Afternoon and evening

PHL · 1h 10m · leaves 17:21 19%

DFW · 59m · leaves 14:37 34%

ORD · 52m · leaves 13:30 39%

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 3845 MCI 05:30 → ORD United UA 1117 ORD 09:15 → BOS Connection details →	1h 44m	6h 27m	97%	84%
Southwest WN 2545 MCI 05:55 → DEN United UA 1232 DEN 09:40 → BOS Connection details →	2h 55m	8h 49m	98%	84%
United UA 355 MCI 06:00 → DEN Southwest WN 3690 DEN 10:00 → BOS Connection details →	3h 04m	9h 05m	98%	80%

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