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 50-minute layover misses 12% of the time at 10 am and 56% of the time at 8 pm.

Nonstops


Delta	LAS	SEA	2h 50m	88%	1.0%	1,742	Flying now
Alaska	LAS	SEA	2h 49m	84%	1.1%	2,628	Flying now
Frontier	LAS	SEA	2h 56m	82%	1.2%	260	Flying now
Southwest	LAS	SEA	2h 50m	72%	0.2%	977	Flying now
Spirit	LAS	SEA	2h 45m	75%few flights	0.0%	12	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	LAS 06:48 → LAX 08:00DL 553	1h 40m Los Angeles	LAX 09:40 → SEA 12:30DL 1714	5h 46m	98%	89%
Delta Details →	LAS 17:00 → SLC 19:25DL 1672	3h 20m Salt Lake City	SLC 22:45 → SEA 23:59DL 2998	6h 59m	98%	89%
Delta Details →	LAS 06:00 → SLC 08:20DL 2674	3h 15m Salt Lake City	SLC 11:35 → SEA 12:52DL 2995	6h 52m	99%	87%
United Details →	LAS 05:30 → DEN 08:32UA 596	2h 50m Denver	DEN 11:22 → SEA 13:22UA 1424	7h 52m	100%	86%
American Details →	LAS 06:44 → PHX 07:58AA 1808	3h 34m Phoenix	PHX 11:32 → SEA 14:49AA 3440 · flown by Envoy	8h 02m	99%	84%
Alaska Details →	LAS 07:00 → PDX 09:17AS 1629	2h 46m Portland	PDX 12:03 → SEA 13:03AS 3078 · flown by SkyWest	6h 03m	100%	83%
United Details →	LAS 14:15 → LAX 15:35UA 2184	3h 32m Los Angeles	LAX 19:07 → SEA 22:00UA 684	7h 45m	99%	83%
American Details →	LAS 09:56 → PHX 11:08AA 2004	3h 27m Phoenix	PHX 14:35 → SEA 17:44AA 4035 · flown by Envoy	7h 48m	98%	82%
Tight connection: often missed
United Details →	LAS 13:34 → SFO 15:16UA 1799	1h 11m San Francisco	SFO 16:27 → SEA 18:47UA 2279	5h 13m	67%	51%
United Details →	LAS 18:20 → SFO 20:02UA 1603	52m San Francisco	SFO 20:54 → SEA 23:19UA 1007	4h 59m	54%	35%
American Details →	LAS 16:53 → DFW 21:49AA 3286	52m Dallas-Fort Worth	DFW 22:41 → SEA 00:57 +1AA 1487	8h 04m	60%	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.

Morning

PDX · 1h 18m · leaves 07:00 2%

SNA · 1h 16m · leaves 08:45 7%

PHX · 1h 00m · leaves 06:20 8%

Afternoon and evening

SFO · 47m · leaves 18:03 56%

SAN · 59m · leaves 18:19 77%

SJC · 50m · leaves 19:15 80%

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 860 LAS 08:35 → SMF Delta DL 4125 SMF 13:00 → SEA Connection details →	2h 55m	6h 41m	100%	93%
Southwest WN 1160 LAS 07:10 → SJC Delta DL 3736 SJC 11:29 → SEA Connection details →	2h 49m	6h 49m	100%	92%
Southwest WN 3715 LAS 07:00 → SNA Alaska AS 548 SNA 12:05 → SEA Connection details →	4h 00m	7h 54m	100%	91%

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