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

Nonstops (seasonal or thin)


Alaska	PDX	BZN	1h 40m	90%	0.0%	463	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Alaska Details →	PDX 05:00 → SEA 05:53AS 2431 · flown by Horizon	1h 13m Seattle	SEA 07:06 → BZN 09:46AS 2141 · flown by Horizon	3h 46m	96%	88%
Delta Details →	PDX 05:45 → SLC 08:39DL 1270	1h 16m Salt Lake City	SLC 09:55 → BZN 11:18DL 1971	4h 32m	99%	88%
United Details →	PDX 05:00 → DEN 08:31UA 459	3h 01m Denver	DEN 11:32 → BZN 13:20UA 1248	7h 20m	99%	85%
Delta Details →	PDX 17:24 → SLC 20:19DL 1244	2h 46m Salt Lake City	SLC 23:05 → BZN 00:23 +1DL 2046	5h 59m	99%	83%
Delta Details →	PDX 15:26 → SEA 16:40DL 4062 · flown by SkyWest	3h 19m Seattle	SEA 19:59 → BZN 22:48DL 4039 · flown by SkyWest	6h 22m	99%	83%
United Details →	PDX 08:50 → DEN 12:24UA 2375	1h 20m Denver	DEN 13:44 → BZN 15:33UA 513	5h 43m	98%	82%
Delta Details →	PDX 07:20 → SEA 08:34DL 4471 · flown by SkyWest	3h 11m Seattle	SEA 11:45 → BZN 14:35DL 4104 · flown by SkyWest	6h 20m	98%	82%
Delta Details →	PDX 09:45 → SLC 12:35DL 1203	1h 15m Salt Lake City	SLC 13:50 → BZN 15:15DL 3906 · flown by SkyWest	4h 30m	93%	81%
Tight connection: often missed
Delta Details →	PDX 09:30 → SEA 10:55DL 3953 · flown by SkyWest	50m Seattle	SEA 11:45 → BZN 14:35DL 4104 · flown by SkyWest	4h 10m	74%	61%
Alaska Details →	PDX 09:19 → SEA 10:21AS 427	1h 08m Seattle	SEA 11:29 → BZN 14:09AS 285	3h 50m	66%	46%
Alaska Details →	PDX 13:48 → SEA 14:43AS 2205 · flown by Horizon	52m Seattle	SEA 15:35 → BZN 18:18AS 3498 · flown by SkyWest	3h 30m	48%	34%

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

SLC · 1h 16m · leaves 05:45 1%

SEA · 1h 13m · leaves 05:00 4%

PHX · 55m · leaves 05:20 12%

Afternoon and evening

SLC · 52m · leaves 19:20 11%

SEA · 54m · leaves 17:50 18%

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 2333 PDX 07:52 → SLC Delta DL 3906 SLC 13:50 → BZN Connection details →	3h 05m	6h 23m	95%	86%
Southwest WN 3195 PDX 05:50 → DEN United UA 1248 DEN 11:32 → BZN Connection details →	2h 17m	6h 30m	98%	85%
Southwest WN 4099 PDX 07:30 → DEN United UA 513 DEN 13:44 → BZN Connection details →	2h 44m	7h 03m	100%	85%

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