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

Connect in the morning. The same one-hour layover misses 1 time in 10 at 10 am and 2 times in 5 at 8 pm.

Nonstops


Delta	SEA	LAS	2h 34m	84%	1.0%	1,742	Flying now
Alaska	SEA	LAS	2h 37m	80%	0.8%	2,631	Flying now
Southwest	SEA	LAS	2h 30m	71%	0.5%	976	Flying now
Frontier	SEA	LAS	2h 38m	69%	1.2%	260	Flying now
Spirit	SEA	LAS	2h 28m	67%few flights	0.0%	12	Not 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 →	SEA 05:00 → SMF 06:50WN 3629	4h 00m Sacramento	SMF 10:50 → LAS 12:20WN 1285	7h 20m	100%	92%
Alaska Details →	SEA 06:42 → PDX 07:37AS 2432 · flown by Horizon	1h 23m Portland	PDX 09:00 → LAS 11:19AS 1628	4h 37m	98%	89%
American Details →	SEA 06:16 → PHX 09:18AA 3792 · flown by Envoy	1h 06m Phoenix	PHX 10:24 → LAS 11:37AA 2037	5h 21m	96%	87%
Delta Details →	SEA 23:59 → MSP 05:17DL 953	1h 48m Minneapolis	MSP 07:05 → LAS 08:27 +1DL 2261	8h 28m	98%	86%
Southwest Details →	SEA 06:15 → OAK 08:25WN 266	1h 55m Oakland	OAK 10:20 → LAS 11:50WN 5053	5h 35m	100%	85%
Southwest Details →	SEA 06:45 → SJC 08:55WN 3626	1h 25m San Jose	SJC 10:20 → LAS 11:50WN 2311	5h 05m	94%	83%
Alaska Details →	SEA 10:14 → PDX 11:21AS 3090 · flown by SkyWest	3h 25m Portland	PDX 14:46 → LAS 17:06AS 778	6h 52m	100%	83%
Alaska Details →	SEA 13:45 → PDX 14:48AS 3204 · flown by SkyWest	3h 02m Portland	PDX 17:50 → LAS 20:12AS 531	6h 27m	98%	82%
Tight connection: often missed
Delta Details →	SEA 12:05 → SAN 15:04DL 2572	47m San Diego	SAN 15:51 → LAS 17:26DL 3751 · flown by SkyWest	5h 21m	67%	54%
American Details →	SEA 13:58 → DFW 20:05AA 717	49m Dallas-Fort Worth	DFW 20:54 → LAS 21:47AA 1797	7h 47m	60%	32%
United Details →	SEA 08:45 → SFO 11:03UA 2831	57m San Francisco	SFO 12:00 → LAS 13:50UA 2449	5h 05m	28%	18%

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

SLC · 1h 12m · leaves 07:15 4%

DFW · 1h 16m · leaves 05:05 4%

PHX · 1h 06m · leaves 06:16 4%

Afternoon and evening

DFW · 49m · leaves 13:58 40%

HOU · 1h 00m · leaves 11:05 61%

AUS · 50m · leaves 13:30 74%

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 1348 SEA 16:45 → SAN Southwest WN 3510 SAN 22:40 → LAS Connection details →	3h 04m	7h 27m	96%	89%
Alaska AS 248 SEA 07:07 → BOI Southwest WN 702 BOI 12:05 → LAS Connection details →	2h 25m	5h 48m	97%	86%
Alaska AS 492 SEA 17:10 → LAX United UA 1546 LAX 22:59 → LAS Connection details →	3h 04m	7h 11m	98%	82%

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