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 83% on time.

Nonstops


Delta	PHX	SEA	3h 13m	88%	1.0%	1,765	Flying now
American	PHX	SEA	3h 18m	87%	0.2%	1,398	Flying now
Alaska	PHX	SEA	3h 12m	85%	0.7%	2,884	Flying now
Southwest	PHX	SEA	3h 05m	65%	0.6%	1,040	Flying now
Frontier	PHX	SEA	3h 15m	85%	0.0%	139	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 →	PHX 06:00 → LAX 07:35DL 4057 · flown by SkyWest	2h 05m Los Angeles	LAX 09:40 → SEA 12:30DL 1714	6h 34m	100%	92%
Delta Details →	PHX 17:05 → SLC 19:43DL 1738	3h 02m Salt Lake City	SLC 22:45 → SEA 23:59DL 2998	6h 54m	98%	90%
Delta Details →	PHX 06:00 → SLC 08:40DL 1535	2h 55m Salt Lake City	SLC 11:35 → SEA 12:52DL 2995	6h 52m	99%	88%
United Details →	PHX 06:00 → DEN 08:52UA 337	2h 30m Denver	DEN 11:22 → SEA 13:22UA 1424	7h 22m	99%	85%
Alaska Details →	PHX 07:00 → PDX 09:43AS 511	2h 20m Portland	PDX 12:03 → SEA 13:03AS 3078 · flown by SkyWest	6h 03m	100%	84%
Delta Details →	PHX 12:15 → LAX 13:46DL 3951 · flown by SkyWest	3h 59m Los Angeles	LAX 17:45 → SEA 20:34DL 2640	8h 19m	100%	81%
United Details →	PHX 09:08 → DEN 12:00UA 597	2h 00m Denver	DEN 14:00 → SEA 16:00UA 2164	6h 52m	97%	80%
Delta Details →	PHX 10:35 → LAX 12:11DL 4119 · flown by SkyWest	1h 49m Los Angeles	LAX 14:00 → SEA 16:47DL 2606	6h 12m	97%	80%
Tight connection: often missed
Alaska Details →	PHX 15:13 → SAN 16:35AS 2028 · flown by Horizon	1h 00m San Diego	SAN 17:35 → SEA 20:35AS 417	5h 22m	50%	34%
American Details →	PHX 17:15 → DFW 21:50AA 3232	51m Dallas-Fort Worth	DFW 22:41 → SEA 00:57 +1AA 1487	7h 42m	47%	20%
United Details →	PHX 07:24 → SFO 09:27UA 2209	48m San Francisco	SFO 10:15 → SEA 12:34UA 2192	5h 10m	37%	17%

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

SMF · 1h 15m · leaves 07:45 4%

DEN · 1h 05m · leaves 06:15 4%

LAX · 1h 16m · leaves 08:00 4%

Afternoon and evening

SAN · 1h 00m · leaves 15:13 50%

DFW · 51m · leaves 17:15 53%

MDW · 55m · leaves 11:00 57%

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 2885 PHX 07:45 → SMF Delta DL 4125 SMF 13:00 → SEA Connection details →	3h 15m	7h 31m	100%	93%
Southwest WN 3347 PHX 07:00 → SNA Alaska AS 471 SNA 10:28 → SEA Connection details →	2h 08m	6h 17m	100%	92%
Southwest WN 759 PHX 07:50 → ONT Delta DL 4070 ONT 11:59 → SEA Connection details →	2h 54m	7h 10m	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