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 86% on time.

Nonstops


Delta	BZN	SEA	2h 03m	89%	0.1%	807	Flying now
Alaska	BZN	SEA	2h 01m	84%	1.1%	1,304	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	BZN 05:15 → SLC 06:36DL 491	1h 14m Salt Lake City	SLC 07:50 → SEA 09:05DL 2874	4h 50m	97%	90%
Delta Details →	BZN 19:30 → SLC 20:55DL 3676 · flown by SkyWest	1h 50m Salt Lake City	SLC 22:45 → SEA 23:59DL 2998	5h 29m	96%	87%
United Details →	BZN 06:30 → DEN 08:24UA 1362	2h 58m Denver	DEN 11:22 → SEA 13:22UA 1424	7h 52m	99%	84%
Delta Details →	BZN 06:00 → MSP 09:18DL 1678	1h 52m Minneapolis	MSP 11:10 → SEA 12:58DL 889	7h 58m	98%	83%
American Details →	BZN 13:16 → PHX 14:48AA 6416 · flown by SkyWest	3h 07m Phoenix	PHX 17:55 → SEA 21:05AA 4307 · flown by Envoy	8h 49m	96%	81%
Delta Details →	BZN 15:53 → MSP 19:15DL 2946	2h 53m Minneapolis	MSP 22:08 → SEA 23:58DL 505	9h 05m	98%	81%
Delta Details →	BZN 12:13 → SLC 13:39DL 1971	3h 41m Salt Lake City	SLC 17:20 → SEA 18:36DL 871	7h 23m	99%	80%
United Details →	BZN 10:33 → DEN 12:25UA 1824	1h 35m Denver	DEN 14:00 → SEA 16:00UA 2164	6h 27m	96%	80%
Tight connection: often missed
Southwest Details →	BZN 16:30 → DEN 18:20WN 1133	1h 30m Denver	DEN 19:50 → SEA 21:50WN 1716	6h 20m	69%	23%
American Details →	BZN 12:37 → ORD 16:58AA 3177	49m Chicago	ORD 17:47 → SEA 20:37AA 3105	9h 00m	50%	22%
Alaska Details →	BZN 17:51 → SFO 19:25AS 2063 · flown by Horizon	1h 03m San Francisco	SFO 20:28 → SEA 22:41AS 591	5h 50m	20%	13%

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 14m · leaves 05:15 3%

Afternoon and evening

DEN · 1h 12m · leaves 17:51 26%

ORD · 49m · leaves 12:37 50%

SFO · 1h 03m · leaves 17:51 80%

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.


Southwest WN 1136 BZN 10:15 → LAS Delta DL 2905 LAS 13:35 → SEA Connection details →	2h 10m	7h 08m	100%	89%
Southwest WN 1130 BZN 06:35 → DEN United UA 1424 DEN 11:22 → SEA Connection details →	3h 12m	7h 47m	100%	86%
Alaska AS 2050 BZN 13:50 → SAN Delta DL 2613 SAN 19:10 → SEA Connection details →	3h 36m	9h 30m	98%	82%

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