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

No clear winner: Southwest’s GEG → SMF flights land within a few points of 87% on time whatever the hour.

Nonstops (seasonal or thin)


Southwest	GEG	SMF	1h 55m	87%	0.2%	607	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Sacramento on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


Alaska Details →	GEG 05:07 → SEA 06:15AS 2065 · flown by Horizon	1h 13m Seattle	SEA 07:28 → SMF 09:26AS 682	4h 19m	100%	94%
Alaska Details →	GEG 05:00 → PDX 06:10AS 710	2h 05m Portland	PDX 08:15 → SMF 09:48AS 485	4h 48m	99%	91%
Alaska Details →	GEG 08:31 → PDX 09:46AS 3201 · flown by SkyWest	1h 14m Portland	PDX 11:00 → SMF 12:33AS 2399 · flown by Horizon	4h 02m	100%	91%
Delta Details →	GEG 06:20 → LAX 09:16DL 3696 · flown by SkyWest	2h 49m Los Angeles	LAX 12:05 → SMF 13:32DL 3812 · flown by SkyWest	7h 13m	99%	88%
Delta Details →	GEG 05:30 → SEA 06:40DL 2218	2h 07m Seattle	SEA 08:47 → SMF 10:50DL 3881 · flown by SkyWest	5h 20m	97%	88%
Delta Details →	GEG 17:37 → SEA 19:05DL 3857 · flown by SkyWest	1h 20m Seattle	SEA 20:25 → SMF 22:28DL 4131 · flown by SkyWest	4h 51m	96%	87%
Delta Details →	GEG 13:00 → SEA 14:27DL 3754 · flown by SkyWest	2h 33m Seattle	SEA 17:00 → SMF 19:01DL 4043 · flown by SkyWest	6h 01m	99%	87%
Delta Details →	GEG 07:00 → SEA 08:24DL 3790 · flown by SkyWest	1h 46m Seattle	SEA 10:10 → SMF 12:18DL 4125 · flown by SkyWest	5h 18m	97%	87%
Tight connection: often missed
United Details →	GEG 16:18 → DEN 19:43UA 2786	57m Denver	DEN 20:40 → SMF 22:15UA 1268	5h 57m	68%	39%
Alaska Details →	GEG 15:16 → PDX 16:32AS 3202 · flown by SkyWest	1h 27m Portland	PDX 17:59 → SMF 19:37AS 1622	4h 21m	48%	38%
United Details →	GEG 19:07 → SFO 21:29UA 6042 · flown by SkyWest	1h 25m San Francisco	SFO 22:54 → SMF 23:59UA 1302	4h 52m	15%	9%

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

SEA · 1h 13m · leaves 05:07 0%

PDX · 1h 14m · leaves 08:31 0%

DEN · 1h 10m · leaves 06:00 2%

Afternoon and evening

SLC · 1h 10m · leaves 19:08 7%

MSP · 1h 15m · leaves 12:35 10%

DEN · 57m · leaves 16:18 32%

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 2065 GEG 05:07 → SEA Delta DL 3881 SEA 08:47 → SMF Connection details →	2h 32m	5h 43m	100%	92%
Alaska AS 279 GEG 06:13 → SEA Delta DL 4125 SEA 10:10 → SMF Connection details →	2h 46m	6h 05m	100%	91%
Delta DL 3696 GEG 06:20 → LAX Southwest WN 265 LAX 12:15 → SMF Connection details →	2h 59m	7h 15m	99%	87%

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