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 3% of the time at 9 am and 16% of the time at 8 pm.

Nonstops


Delta	MCI	SEA	4h 06m	87%	1.6%	364	Flying now
Alaska	MCI	SEA	4h 00m	85%	0.8%	749	Flying now
Southwest	MCI	SEA	–	72%few flights	0.0%	18	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Seattle on time. Total trip = scheduled departure to arrival, layover included (Seattle is 2 h behind Kansas City). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	MCI 18:00 → SLC 19:47DL 2903	2h 58m Salt Lake City	SLC 22:45 → SEA 23:59DL 2998	7h 59m	99%	90%
Delta Details →	MCI 07:32 → LAX 09:00DL 1354	2h 59m Los Angeles	LAX 11:59 → SEA 14:54DL 1045	9h 22m	100%	88%
Delta Details →	MCI 07:02 → SLC 08:45DL 2897	2h 50m Salt Lake City	SLC 11:35 → SEA 12:52DL 2995	7h 50m	99%	86%
United Details →	MCI 06:00 → DEN 06:56UA 355	1h 05m Denver	DEN 08:01 → SEA 10:00UA 2271	6h 00m	97%	86%
Delta Details →	MCI 05:38 → ATL 08:44DL 1204	2h 26m Atlanta	ATL 11:10 → SEA 13:38DL 648	10h 00m	100%	85%
United Details →	MCI 09:34 → ORD 11:29UA 5504 · flown by SkyWest	2h 01m Chicago	ORD 13:30 → SEA 16:09UA 1660	8h 35m	100%	85%
American Details →	MCI 14:18 → PHX 15:15AA 2058	2h 40m Phoenix	PHX 17:55 → SEA 21:05AA 4307 · flown by Envoy	8h 47m	100%	84%
Delta Details →	MCI 06:23 → MSP 07:54DL 1635	3h 16m Minneapolis	MSP 11:10 → SEA 12:58DL 889	8h 35m	98%	83%
Tight connection: often missed
American Details →	MCI 19:53 → DFW 21:41AA 2047	1h 00m Dallas-Fort Worth	DFW 22:41 → SEA 00:57 +1AA 1487	7h 04m	62%	25%
Southwest Details →	MCI 16:15 → DEN 17:05WN 2549	2h 45m Denver	DEN 19:50 → SEA 21:50WN 1716	7h 35m	74%	24%
Southwest Details →	MCI 19:10 → DEN 20:05WN 3570	1h 05m Denver	DEN 21:10 → SEA 23:10WN 3856	5h 55m	65%	18%

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

EWR · 1h 07m · leaves 06:05 3%

ATL · 1h 08m · leaves 05:38 3%

DEN · 1h 05m · leaves 06:00 3%

Afternoon and evening

LAS · 50m · leaves 15:30 39%

DEN · 47m · leaves 19:10 40%

SFO · 1h 09m · leaves 19:59 69%

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.


Southwest WN 2528 MCI 06:50 → AUS Delta DL 1684 AUS 11:19 → SEA Connection details →	2h 39m	9h 04m	100%	94%
United UA 5489 MCI 16:26 → LAX Alaska AS 495 LAX 21:12 → SEA Connection details →	3h 02m	9h 33m	100%	92%
Southwest WN 4827 MCI 05:30 → LAX Delta DL 1714 LAX 09:40 → SEA Connection details →	2h 45m	9h 04m	98%	90%

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