Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No clear winner: Alaska’s FCA → SEA flights land within a few points of 85% on time whatever the hour.

Nonstops


Alaska	FCA	SEA	1h 37m	85%	1.4%	1,063	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 1 h behind Kalispell). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	FCA 18:10 → SLC 20:00DL 3798 · flown by SkyWest	2h 45m Salt Lake City	SLC 22:45 → SEA 23:59DL 2998	6h 49m	99%	90%
United Details →	FCA 06:20 → DEN 08:28UA 1561	2h 54m Denver	DEN 11:22 → SEA 13:22UA 1424	8h 02m	95%	82%
Delta Details →	FCA 12:22 → SLC 14:09DL 2813	3h 11m Salt Lake City	SLC 17:20 → SEA 18:36DL 871	7h 14m	100%	81%
United Details →	FCA 10:42 → DEN 13:06UA 5991 · flown by SkyWest	2h 52m Denver	DEN 15:58 → SEA 17:59UA 2013	8h 17m	98%	78%
Alaska Details →	FCA 13:10 → PDX 13:49AS 2283 · flown by Horizon	1h 41m Portland	PDX 15:30 → SEA 16:30AS 3408 · flown by SkyWest	4h 20m	97%	77%
Alaska Details →	FCA 14:10 → SAN 16:16AS 2187 · flown by Horizon	2h 19m San Diego	SAN 18:35 → SEA 21:35AS 1431	8h 25m	100%	73%
United Details →	FCA 16:11 → SFO 17:50UA 5936 · flown by SkyWest	3h 04m San Francisco	SFO 20:54 → SEA 23:19UA 1007	8h 08m	99%	64%
United Details →	FCA 14:33 → DEN 16:50UA 1199	2h 20m Denver	DEN 19:10 → SEA 21:10UA 360	7h 37m	95%	64%

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 5427 FCA 13:20 → LAX Alaska AS 1301 LAX 18:09 → SEA Connection details →	2h 46m	8h 36m	98%	86%
Alaska AS 2283 FCA 13:10 → PDX Delta DL 4062 PDX 15:26 → SEA Connection details →	1h 37m	4h 31m	92%	82%
United UA 5936 FCA 16:11 → SFO Alaska AS 591 SFO 20:28 → SEA Connection details →	2h 38m	7h 30m	94%	66%

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