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

No clear winner: United’s FCA → SFO flights land within a few points of 2 in 3 on time whatever the hour.

Nonstops (seasonal or thin)


United	FCA	SFO	2h 41m	68%	1.2%	250	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach San Francisco on time. Total trip = scheduled departure to arrival, layover included (San Francisco is 1 h behind Kalispell). Layovers up to 4 hours. Pick a connection for the details.


United Details →	FCA 13:20 → LAX 15:23UA 5427 · flown by SkyWest	1h 47m Los Angeles	LAX 17:10 → SFO 18:38UA 233	6h 18m	98%	82%
United Details →	FCA 10:42 → DEN 13:06UA 5991 · flown by SkyWest	2h 41m Denver	DEN 15:47 → SFO 17:30UA 2633	7h 48m	98%	72%
United Details →	FCA 06:20 → DEN 08:28UA 1561	2h 53m Denver	DEN 11:21 → SFO 13:04UA 1561	7h 44m	95%	68%
Alaska Details →	FCA 13:10 → PDX 13:49AS 2283 · flown by Horizon	1h 00m Portland	PDX 14:49 → SFO 16:40AS 236	4h 30m	92%	67%
Delta Details →	FCA 18:10 → SLC 20:00DL 3798 · flown by SkyWest	2h 50m Salt Lake City	SLC 22:50 → SFO 23:52DL 1091	6h 46m	99%	65%
Delta Details →	FCA 05:19 → SLC 07:05DL 2201	3h 55m Salt Lake City	SLC 11:00 → SFO 12:08DL 902	7h 49m	97%	63%
Alaska Details →	FCA 11:28 → SEA 12:05AS 2207 · flown by Horizon	1h 15m Seattle	SEA 13:20 → SFO 15:31AS 680	5h 03m	86%	58%
Delta Details →	FCA 12:22 → SLC 14:09DL 2813	1h 01m Salt Lake City	SLC 15:10 → SFO 16:12DL 1088	4h 53m	89%	58%
Tight connection: often missed
American Details →	FCA 15:51 → DFW 20:30AA 1842	1h 04m Dallas-Fort Worth	DFW 21:34 → SFO 23:18AA 2430	8h 27m	67%	30%
American Details →	FCA 12:26 → DFW 17:05AA 1845	47m Dallas-Fort Worth	DFW 17:52 → SFO 19:39AA 3072	8h 13m	65%	25%

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.

Afternoon and evening

DEN · 1h 04m · leaves 14:33 13%

LAX · 51m · leaves 13:20 15%

DFW · 47m · leaves 12:26 35%

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 2122 FCA 06:33 → SEA United UA 1482 SEA 10:29 → SFO Connection details →	3h 24m	7h 14m	97%	68%
Alaska AS 2207 FCA 11:28 → SEA Delta DL 3707 SEA 14:30 → SFO Connection details →	2h 25m	6h 22m	94%	66%
Delta DL 2813 FCA 12:22 → SLC Frontier F9 3393 SLC 16:56 → SFO Connection details →	2h 47m	6h 58m	98%	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