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 MSO → PDX flights land within a few points of 9 in 10 on time whatever the hour.

Nonstops (seasonal or thin)


Alaska	MSO	PDX	1h 35m	90%	1.4%	517	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

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


Alaska Details →	MSO 07:03 → SEA 07:45AS 561	2h 29m Seattle	SEA 10:14 → PDX 11:21AS 3090 · flown by SkyWest	5h 18m	100%	96%
Alaska Details →	MSO 07:00 → SEA 07:32AS 2153 · flown by Horizon	1h 13m Seattle	SEA 08:45 → PDX 09:49AS 3132 · flown by SkyWest	3h 49m	100%	92%
Delta Details →	MSO 18:29 → SLC 20:15DL 3808 · flown by SkyWest	2h 35m Salt Lake City	SLC 22:50 → PDX 23:44DL 1373	6h 16m	99%	88%
United + Frontiertwo ticketsDetails →	MSO 10:36 → DEN 12:48UA 5484 · flown by SkyWest	2h 20m Denver	DEN 15:08 → PDX 16:51F9 2553	7h 17m	100%	86%
Alaska Details →	MSO 11:22 → SEA 12:02AS 3100 · flown by SkyWest	1h 43m Seattle	SEA 13:45 → PDX 14:48AS 3204 · flown by SkyWest	4h 26m	98%	86%
Alaska + Deltatwo ticketsDetails →	MSO 17:00 → SEA 17:41AS 697	3h 18m Seattle	SEA 20:59 → PDX 22:02DL 3913 · flown by SkyWest	6h 02m	99%	83%
Alaska Details →	MSO 19:59 → SEA 20:33AS 2138 · flown by Horizon	2h 53m Seattle	SEA 23:26 → PDX 00:22 +1AS 2377 · flown by Horizon	5h 23m	98%	80%
Delta Details →	MSO 13:17 → SLC 15:00DL 4112 · flown by SkyWest	2h 25m Salt Lake City	SLC 17:25 → PDX 18:18DL 1238	6h 01m	99%	78%
Tight connection: often missed
United Details →	MSO 16:19 → SFO 17:50UA 5417 · flown by SkyWest	1h 06m San Francisco	SFO 18:56 → PDX 20:54UA 2262	5h 35m	56%	45%
Alaska Details →	MSO 19:59 → SEA 20:33AS 2138 · flown by Horizon	55m Seattle	SEA 21:28 → PDX 22:25AS 498	3h 26m	30%	22%

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.

Afternoon and evening

LAX · 1h 17m · leaves 16:44 19%

SFO · 1h 06m · leaves 16:19 44%

SEA · 55m · leaves 19:59 70%

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.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

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