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 80-minute layover misses 4% of the time at 11 am and 17% of the time at 9 pm.

Nonstops


Alaska	SEA	MCI	3h 33m	84%	0.5%	749	Flying now
Delta	SEA	MCI	3h 36m	77%	1.6%	364	Flying now
Southwest	SEA	MCI	–	39%few flights	0.0%	18	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	SEA 23:05 → MDW 05:00WN 2304	3h 00m Chicago	MDW 08:00 → MCI 09:30 +1WN 2808	8h 25m	98%	98%
Southwest Details →	SEA 05:15 → DEN 08:50WN 3615	1h 10m Denver	DEN 10:00 → MCI 12:45WN 3114	5h 30m	96%	94%
United Details →	SEA 06:00 → LAX 08:44UA 1692	1h 26m Los Angeles	LAX 10:10 → MCI 15:45UA 5426 · flown by SkyWest	7h 45m	100%	92%
Delta Details →	SEA 21:45 → ATL 05:36DL 567	2h 44m Atlanta	ATL 08:20 → MCI 09:31 +1DL 2471	9h 46m	99%	89%
American Details →	SEA 00:44 → DFW 06:43AA 2429	3h 17m Dallas-Fort Worth	DFW 10:00 → MCI 11:44AA 3661 · flown by Envoy	9h 00m	100%	88%
Delta Details →	SEA 22:58 → ATL 06:45DL 409	3h 20m Atlanta	ATL 10:05 → MCI 11:16 +1DL 2908	10h 18m	100%	88%
Delta Details →	SEA 06:05 → MSP 11:24DL 943	3h 56m Minneapolis	MSP 15:20 → MCI 16:47DL 1630	8h 43m	100%	86%
Delta Details →	SEA 05:30 → SLC 08:30DL 1128	2h 04m Salt Lake City	SLC 10:34 → MCI 14:00DL 2882	6h 30m	98%	86%
Tight connection: often missed
Delta Details →	SEA 08:40 → ATL 16:33DL 797	1h 12m Atlanta	ATL 17:45 → MCI 18:56DL 1470	8h 16m	75%	56%
American Details →	SEA 15:20 → PHX 18:25AA 3440 · flown by Envoy	1h 07m Phoenix	PHX 19:32 → MCI 00:13 +1AA 623	6h 53m	71%	48%
United Details →	SEA 13:55 → ORD 20:21UA 2101	1h 04m Chicago	ORD 21:25 → MCI 23:17UA 4723 · flown by SkyWest	7h 22m	70%	38%

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 · 1h 07m · leaves 05:00 2%

DFW · 1h 16m · leaves 05:05 4%

Afternoon and evening

PHX · 1h 07m · leaves 15:20 29%

ORD · 1h 00m · leaves 15:28 40%

DEN · 1h 15m · leaves 14:35 57%

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.


Alaska AS 781 SEA 21:36 → BWI Southwest WN 4215 BWI 08:15 → MCI Connection details →	2h 34m	10h 21m	100%	98%
United UA 2601 SEA 05:00 → DEN Southwest WN 351 DEN 12:30 → MCI Connection details →	3h 47m	8h 05m	99%	86%
Southwest WN 3397 SEA 07:50 → DEN United UA 586 DEN 13:40 → MCI Connection details →	2h 15m	6h 32m	98%	86%

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