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 2% of the time at 9 am and 22% of the time at 5 pm.

Nonstops


Alaska	PDX	SFO	1h 56m	70%	0.7%	1,690	Flying now
United	PDX	SFO	1h 51m	70%	0.3%	2,030	Flying now
Frontier	PDX	SFO	–	100%few flights	0.0%	6	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	PDX 08:50 → DEN 12:24UA 2375	1h 01m Denver	DEN 13:25 → SFO 15:09UA 1812	6h 19m	97%	73%
Alaska Details →	PDX 07:32 → SAN 10:05AS 577	3h 25m San Diego	SAN 13:30 → SFO 15:14AS 3352 · flown by SkyWest	7h 42m	100%	73%
United Details →	PDX 05:00 → DEN 08:31UA 459	2h 50m Denver	DEN 11:21 → SFO 13:04UA 1561	8h 04m	99%	71%
Alaska Details →	PDX 13:48 → SEA 14:43AS 2205 · flown by Horizon	1h 53m Seattle	SEA 16:36 → SFO 18:48AS 1385	5h 00m	100%	70%
Delta Details →	PDX 09:30 → SEA 10:55DL 3953 · flown by SkyWest	3h 35m Seattle	SEA 14:30 → SFO 16:50DL 3707 · flown by SkyWest	7h 20m	99%	69%
Delta Details →	PDX 17:50 → SEA 19:05DL 3918 · flown by SkyWest	2h 40m Seattle	SEA 21:45 → SFO 00:06 +1DL 2635	6h 16m	98%	69%
Alaska Details →	PDX 07:19 → SEA 08:20AS 2420 · flown by Horizon	3h 22m Seattle	SEA 11:42 → SFO 14:04AS 655	6h 45m	100%	68%
United Details →	PDX 11:05 → DEN 14:43UA 2793	3h 11m Denver	DEN 17:54 → SFO 19:40UA 1007	8h 35m	100%	67%
Tight connection: often missed
Alaska Details →	PDX 17:40 → SAN 20:18AS 369	1h 09m San Diego	SAN 21:27 → SFO 23:08AS 291	5h 28m	70%	27%

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

DEN · 1h 12m · leaves 05:00 2%

SEA · 1h 10m · leaves 05:00 4%

SNA · 1h 13m · leaves 07:00 5%

Afternoon and evening

LAS · 57m · leaves 14:46 18%

SEA · 1h 09m · leaves 17:30 18%

SAN · 1h 09m · leaves 17:40 30%

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 695 PDX 10:45 → LAX United UA 233 LAX 17:10 → SFO Connection details →	3h 50m	7h 53m	99%	82%
Alaska AS 278 PDX 17:37 → LAX American AA 6510 LAX 22:32 → SFO Connection details →	2h 23m	6h 22m	96%	78%
Southwest WN 4099 PDX 07:30 → DEN United UA 1812 DEN 13:25 → SFO Connection details →	2h 25m	7h 39m	100%	76%

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