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

No clear winner: Alaska’s PDX → GEG flights land within a few points of 9 in 10 on time whatever the hour.

Nonstops


Alaska	PDX	GEG	1h 10m	89%	0.8%	1,759	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	PDX 11:20 → SEA 12:36DL 3818 · flown by SkyWest	3h 04m Seattle	SEA 15:40 → GEG 16:57DL 3857 · flown by SkyWest	5h 37m	99%	92%
Alaska Details →	PDX 06:19 → SEA 07:17AS 499	2h 38m Seattle	SEA 09:55 → GEG 11:00AS 2200 · flown by Horizon	4h 41m	100%	89%
Delta Details →	PDX 15:26 → SEA 16:40DL 4062 · flown by SkyWest	3h 16m Seattle	SEA 19:56 → GEG 21:12DL 3677 · flown by SkyWest	5h 46m	99%	89%
Alaska Details →	PDX 05:00 → SEA 05:53AS 2431 · flown by Horizon	1h 27m Seattle	SEA 07:20 → GEG 08:26AS 2135 · flown by Horizon	3h 26m	96%	88%
Delta Details →	PDX 09:30 → SEA 10:55DL 3953 · flown by SkyWest	3h 24m Seattle	SEA 14:19 → GEG 15:40DL 4145 · flown by SkyWest	6h 10m	99%	86%
Delta Details →	PDX 05:30 → SEA 06:41DL 4008 · flown by SkyWest	2h 39m Seattle	SEA 09:20 → GEG 10:34DL 3824 · flown by SkyWest	5h 04m	98%	86%
United Details →	PDX 08:50 → DEN 12:24UA 2375	1h 22m Denver	DEN 13:46 → GEG 15:12UA 324	6h 21m	98%	85%
United Details →	PDX 05:15 → SFO 07:01UA 1896	1h 09m San Francisco	SFO 08:10 → GEG 10:27UA 6014 · flown by SkyWest	5h 12m	95%	83%
Tight connection: often missed
Delta Details →	PDX 20:44 → SEA 21:56DL 3923 · flown by SkyWest	49m Seattle	SEA 22:45 → GEG 23:55DL 2354	3h 11m	68%	39%
Alaska Details →	PDX 19:38 → SEA 20:33AS 2313 · flown by Horizon	57m Seattle	SEA 21:30 → GEG 22:36AS 2071 · flown by Horizon	2h 58m	52%	37%
Alaska Details →	PDX 09:19 → SEA 10:21AS 427	1h 02m Seattle	SEA 11:23 → GEG 12:29AS 449	3h 10m	52%	31%

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

SFO · 1h 09m · leaves 05:15 5%

SEA · 46m · leaves 07:20 14%

Afternoon and evening

SLC · 1h 02m · leaves 19:20 9%

SEA · 49m · leaves 20:44 32%

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 3431 PDX 10:35 → SEA Delta DL 3857 SEA 15:40 → GEG Connection details →	3h 57m	6h 22m	99%	92%
Delta DL 4008 PDX 05:30 → SEA Alaska AS 2200 SEA 09:55 → GEG Connection details →	3h 14m	5h 30m	98%	88%
Alaska AS 2431 PDX 05:00 → SEA Delta DL 3824 SEA 09:20 → GEG Connection details →	3h 27m	5h 34m	100%	86%

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