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

No clear winner: airlines and hours on this route all land within a few points of 85% on time.

Nonstops


Delta	SEA	BZN	1h 49m	88%	0.2%	806	Flying now
Alaska	SEA	BZN	1h 40m	84%	0.8%	1,305	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 Seattle). Layovers up to 4 hours. Pick a connection for the details.


Alaska Details →	SEA 06:42 → PDX 07:37AS 2432 · flown by Horizon	2h 53m Portland	PDX 10:30 → BZN 13:10AS 2022 · flown by Horizon	5h 28m	100%	89%
Delta Details →	SEA 07:15 → SLC 10:23DL 2858	3h 27m Salt Lake City	SLC 13:50 → BZN 15:15DL 3906 · flown by SkyWest	7h 00m	99%	88%
Delta Details →	SEA 05:30 → SLC 08:30DL 1128	1h 25m Salt Lake City	SLC 09:55 → BZN 11:18DL 1971	4h 47m	98%	86%
Delta Details →	SEA 06:05 → MSP 11:24DL 943	1h 53m Minneapolis	MSP 13:17 → BZN 14:48DL 2946	7h 45m	98%	86%
United Details →	SEA 05:00 → DEN 08:43UA 2601	2h 49m Denver	DEN 11:32 → BZN 13:20UA 1248	7h 20m	99%	85%
Delta Details →	SEA 11:05 → SLC 14:11DL 1265	3h 09m Salt Lake City	SLC 17:20 → BZN 18:44DL 3676 · flown by SkyWest	6h 41m	99%	85%
Delta Details →	SEA 17:59 → SLC 21:09DL 1165	1h 56m Salt Lake City	SLC 23:05 → BZN 00:23 +1DL 2046	5h 24m	94%	79%
United Details →	SEA 12:50 → DEN 16:42UA 1351	2h 43m Denver	DEN 19:25 → BZN 21:14UA 1347	7h 24m	98%	79%
Tight connection: often missed
United Details →	SEA 14:33 → DEN 18:22UA 333	1h 03m Denver	DEN 19:25 → BZN 21:14UA 1347	5h 41m	71%	57%
United Details →	SEA 08:45 → SFO 11:03UA 2831	57m San Francisco	SFO 12:00 → BZN 15:21UA 562	5h 36m	28%	17%

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 05m · leaves 07:50 5%

SAN · 1h 15m · leaves 07:26 12%

SFO · 57m · leaves 08:45 72%

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.


Delta DL 1628 SEA 07:15 → LAX United UA 2212 LAX 12:50 → BZN Connection details →	2h 45m	8h 09m	98%	89%
Alaska AS 292 SEA 07:18 → SLC Delta DL 3906 SLC 13:50 → BZN Connection details →	3h 23m	6h 57m	98%	88%
Delta DL 3953 SEA 07:30 → PDX Alaska AS 2022 PDX 10:30 → BZN Connection details →	1h 51m	4h 40m	95%	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