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 SAN → FCA flights land within a few points of 87% on time whatever the hour.

Nonstops (seasonal or thin)


Alaska	SAN	FCA	3h 07m	87%	0.0%	48	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	SAN 06:15 → SLC 09:22DL 1117	1h 28m Salt Lake City	SLC 10:50 → FCA 12:47DL 3804 · flown by SkyWest	5h 32m	98%	93%
Alaska Details →	SAN 06:50 → PDX 09:29AS 399	1h 37m Portland	PDX 11:06 → FCA 13:30AS 2044 · flown by Horizon	5h 40m	98%	88%
Delta Details →	SAN 09:47 → SLC 12:50DL 1177	2h 51m Salt Lake City	SLC 15:41 → FCA 17:30DL 3798 · flown by SkyWest	6h 43m	99%	88%
United Details →	SAN 06:20 → LAX 07:21UA 1006	1h 07m Los Angeles	LAX 08:28 → FCA 12:27UA 5728 · flown by SkyWest	5h 07m	96%	88%
United Details →	SAN 06:35 → DEN 10:08UA 2368	1h 07m Denver	DEN 11:15 → FCA 13:30UA 1547	5h 55m	98%	79%
United Details →	SAN 12:33 → DEN 16:06UA 1565	3h 24m Denver	DEN 19:30 → FCA 21:47UA 696	8h 14m	98%	75%
Alaska Details →	SAN 07:18 → SEA 10:26AS 512	3h 07m Seattle	SEA 13:33 → FCA 15:54AS 2105 · flown by Horizon	7h 36m	98%	75%
Alaska Details →	SAN 15:16 → SEA 18:14AS 1381	3h 21m Seattle	SEA 21:35 → FCA 23:59AS 2121 · flown by Horizon	7h 43m	98%	75%
Tight connection: often missed
Alaska Details →	SAN 17:35 → SEA 20:35AS 417	1h 00m Seattle	SEA 21:35 → FCA 23:59AS 2121 · flown by Horizon	5h 24m	69%	53%

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 06:35 2%

LAX · 1h 07m · leaves 06:20 4%

DFW · 52m · leaves 06:16 21%

Afternoon and evening

SLC · 1h 10m · leaves 17:01 13%

SEA · 1h 00m · leaves 17:35 31%

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 3122 SAN 08:55 → SLC Delta DL 3798 SLC 15:41 → FCA Connection details →	3h 32m	7h 35m	100%	90%
Alaska AS 1618 SAN 07:00 → DEN United UA 2246 DEN 13:53 → FCA Connection details →	3h 20m	8h 11m	100%	78%
Delta DL 2530 SAN 07:00 → SEA Alaska AS 2105 SEA 13:33 → FCA Connection details →	3h 28m	7h 54m	98%	78%

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