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

No clear winner: United’s PSC → DEN flights land within a few points of 9 in 10 on time whatever the hour.

Nonstops (seasonal or thin)


United	PSC	DEN	2h 29m	90%	0.5%	728	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Denver on time. Total trip = scheduled departure to arrival, layover included (Denver is 1 h ahead of Pasco). Layovers up to 4 hours. Pick a connection for the details.


Alaska Details →	PSC 05:23 → PDX 06:18AS 3109 · flown by SkyWest	1h 02m Portland	PDX 07:20 → DEN 11:03AS 401	4h 40m	98%	96%
United Details →	PSC 13:35 → SFO 15:44UA 5578 · flown by SkyWest	3h 12m San Francisco	SFO 18:56 → DEN 22:44UA 2436	8h 09m	96%	85%
Delta Details →	PSC 05:25 → SEA 06:39DL 3972 · flown by SkyWest	1h 51m Seattle	SEA 08:30 → DEN 12:18DL 1358	5h 53m	96%	81%
Delta Details →	PSC 06:00 → SLC 08:38DL 1645	1h 37m Salt Lake City	SLC 10:15 → DEN 11:53DL 1553	4h 53m	97%	81%
Delta Details →	PSC 15:25 → SEA 16:40DL 3891 · flown by SkyWest	3h 16m Seattle	SEA 19:56 → DEN 23:46DL 2851	7h 21m	100%	76%
Delta Details →	PSC 07:05 → MSP 12:04DL 2622	2h 23m Minneapolis	MSP 14:27 → DEN 15:38DL 1025	7h 33m	95%	76%
Delta Details →	PSC 17:21 → SLC 20:10DL 3728 · flown by SkyWest	55m Salt Lake City	SLC 21:05 → DEN 22:40DL 1667	4h 19m	95%	76%
Alaska Details →	PSC 12:56 → SEA 14:02AS 2306 · flown by Horizon	2h 24m Seattle	SEA 16:26 → DEN 20:10AS 602	6h 14m	98%	74%
Tight connection: often missed
United Details →	PSC 07:00 → SFO 09:06UA 6046 · flown by SkyWest	1h 34m San Francisco	SFO 10:40 → DEN 14:23UA 1604	6h 23m	64%	44%

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 02m · leaves 05:23 2%

Afternoon and evening

SLC · 55m · leaves 17:21 5%

PDX · 1h 14m · leaves 15:59 8%

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 3109 PSC 05:23 → PDX United UA 2375 PDX 08:50 → DEN Connection details →	2h 32m	6h 01m	100%	96%
Alaska AS 3304 PSC 07:02 → LAX United UA 360 LAX 12:46 → DEN Connection details →	3h 04m	8h 14m	99%	88%
Delta DL 1645 PSC 06:00 → SLC United UA 2004 SLC 10:39 → DEN Connection details →	2h 01m	5h 24m	97%	87%

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