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

No clear winner: airlines and hours on this route all land within a few points of 84% on time.

Nonstops (seasonal or thin)


Southwest	GEG	LAS	2h 20m	87%	0.1%	750	Flying now
Allegiant	GEG	LAS	2h 17m	57%	1.0%	105	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	GEG 05:00 → SMF 06:50WN 367	4h 00m Sacramento	SMF 10:50 → LAS 12:20WN 1285	7h 20m	100%	92%
Alaska Details →	GEG 05:00 → PDX 06:10AS 710	2h 50m Portland	PDX 09:00 → LAS 11:19AS 1628	6h 19m	99%	91%
Alaska Details →	GEG 05:07 → SEA 06:15AS 2065 · flown by Horizon	1h 33m Seattle	SEA 07:48 → LAS 10:29AS 612	5h 22m	100%	87%
American Details →	GEG 06:30 → PHX 09:14AA 1789	1h 10m Phoenix	PHX 10:24 → LAS 11:37AA 2037	5h 07m	94%	84%
Southwest Details →	GEG 06:00 → DEN 09:10WN 1333	1h 50m Denver	DEN 11:00 → LAS 11:55WN 1561	5h 55m	100%	83%
Alaska Details →	GEG 08:31 → PDX 09:46AS 3201 · flown by SkyWest	59m Portland	PDX 10:45 → LAS 13:11AS 757	4h 40m	97%	82%
Alaska Details →	GEG 12:42 → PDX 13:52AS 251	3h 58m Portland	PDX 17:50 → LAS 20:12AS 531	7h 30m	100%	81%
United Details →	GEG 05:00 → DEN 08:20UA 1234	3h 02m Denver	DEN 11:22 → LAS 12:24UA 526	7h 24m	99%	81%
Tight connection: often missed
United Details →	GEG 13:41 → DEN 16:57UA 1255	49m Denver	DEN 17:46 → LAS 18:50UA 2338	5h 09m	68%	44%
American Details →	GEG 12:49 → DFW 18:34AA 1885	48m Dallas-Fort Worth	DFW 19:22 → LAS 20:11AA 1771	7h 22m	53%	29%
Alaska Details →	GEG 15:16 → PDX 16:32AS 3202 · flown by SkyWest	1h 18m Portland	PDX 17:50 → LAS 20:12AS 531	4h 56m	32%	26%

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

PDX · 59m · leaves 08:31 3%

PHX · 1h 10m · leaves 06:30 6%

SEA · 1h 13m · leaves 09:06 14%

Afternoon and evening

DFW · 48m · leaves 12:49 47%

SAN · 50m · leaves 12:55 65%

PDX · 1h 18m · leaves 15:16 68%

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.


Southwest WN 1884 GEG 05:25 → PHX American AA 2037 PHX 10:24 → LAS Connection details →	2h 24m	6h 12m	97%	88%
Alaska AS 279 GEG 06:13 → SEA Delta DL 2905 SEA 09:55 → LAS Connection details →	2h 31m	6h 15m	100%	85%
Delta DL 3799 GEG 16:20 → LAX United UA 1546 LAX 22:59 → LAS Connection details →	3h 45m	8h 01m	100%	84%

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