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

The nonstop is quickest: JetBlue BZN → BOS (4h 29m), on time 2 times in 3. United via Denver (7h 14m) is more reliable, 83%, but takes 2h 45m longer.

Nonstops (seasonal or thin)


JetBlue	BZN	BOS	4h 29m	68%	4.2%	142	Flying now
Delta	BZN	BOS	4h 30m	65%	4.6%	65	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Boston on time. Total trip = scheduled departure to arrival, layover included (Boston is 2 h ahead of Bozeman). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	BZN 19:30 → SLC 20:55DL 3676 · flown by SkyWest	2h 36m Salt Lake City	SLC 23:31 → BOS 06:05 +1DL 696	8h 35m	97%	86%
United Details →	BZN 06:30 → DEN 08:24UA 1362	1h 16m Denver	DEN 09:40 → BOS 15:44UA 1232	7h 14m	97%	83%
Southwest Details →	BZN 06:35 → DEN 08:10WN 1130	1h 50m Denver	DEN 10:00 → BOS 16:05WN 3690	7h 30m	98%	81%
Delta Details →	BZN 05:15 → SLC 06:36DL 491	3h 14m Salt Lake City	SLC 09:50 → BOS 16:37DL 657	9h 22m	99%	80%
Alaska + Deltatwo ticketsDetails →	BZN 18:58 → SEA 20:02AS 3498 · flown by SkyWest	3h 13m Seattle	SEA 23:15 → BOS 07:35 +1DL 473	10h 37m	96%	78%
Delta Details →	BZN 12:13 → SLC 13:39DL 1971	3h 36m Salt Lake City	SLC 17:15 → BOS 23:49DL 702	9h 36m	99%	77%
Delta Details →	BZN 14:21 → ATL 20:14DL 406	2h 36m Atlanta	ATL 22:50 → BOS 01:31 +1DL 865	9h 10m	97%	75%
Alaska Details →	BZN 06:03 → SEA 06:57AS 461	1h 26m Seattle	SEA 08:23 → BOS 16:53AS 306	8h 50m	100%	75%
Tight connection: often missed
United Details →	BZN 16:24 → ORD 20:40UA 1744	1h 01m Chicago	ORD 21:41 → BOS 01:14 +1UA 1779	6h 50m	66%	43%
United Details →	BZN 13:10 → EWR 19:33UA 2003	52m Newark	EWR 20:25 → BOS 21:53UA 2058	6h 43m	73%	41%

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 16m · leaves 06:30 3%

MDW · 1h 05m · leaves 07:35 5%

MSP · 47m · leaves 06:00 12%

Afternoon and evening

MSP · 54m · leaves 15:53 15%

EWR · 52m · leaves 13:10 27%

ORD · 1h 01m · leaves 16:24 34%

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