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 7 in 10 on time.

Nonstops


United	ORD	BZN	3h 30m	73%	0.9%	758	Flying now
American	ORD	BZN	3h 26m	66%	0.6%	510	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 behind Chicago). Layovers up to 4 hours. Pick a connection for the details.


United Details →	ORD 05:00 → DEN 06:42UA 2666	1h 11m Denver	DEN 07:53 → BZN 09:37UA 348	5h 37m	99%	92%
United Details →	ORD 07:00 → LAX 09:33UA 2361	3h 17m Los Angeles	LAX 12:50 → BZN 16:24UA 2212	10h 24m	100%	89%
Delta Details →	ORD 07:45 → SLC 10:15DL 2231	3h 35m Salt Lake City	SLC 13:50 → BZN 15:15DL 3906 · flown by SkyWest	8h 30m	96%	85%
United Details →	ORD 06:00 → DEN 07:42UA 2806	3h 50m Denver	DEN 11:32 → BZN 13:20UA 1248	8h 20m	100%	85%
Delta Details →	ORD 08:36 → MSP 10:15DL 1554	3h 02m Minneapolis	MSP 13:17 → BZN 14:48DL 2946	7h 14m	96%	85%
United Details →	ORD 08:40 → DEN 10:31UA 526	3h 13m Denver	DEN 13:44 → BZN 15:33UA 513	7h 53m	100%	85%
Delta Details →	ORD 06:55 → SEA 09:31DL 2041	2h 14m Seattle	SEA 11:45 → BZN 14:35DL 4104 · flown by SkyWest	8h 45m	97%	80%
Delta Details →	ORD 05:30 → ATL 08:33DL 1264	2h 36m Atlanta	ATL 11:09 → BZN 13:11DL 406	8h 43m	98%	78%
Tight connection: often missed
Alaska Details →	ORD 08:02 → SEA 10:37AS 587	52m Seattle	SEA 11:29 → BZN 14:09AS 285	7h 07m	55%	39%
American Details →	ORD 14:59 → DFW 17:36AA 2257	59m Dallas-Fort Worth	DFW 18:35 → BZN 20:43AA 1774	6h 44m	64%	33%
Delta Details →	ORD 19:37 → SLC 22:15DL 2376	50m Salt Lake City	SLC 23:05 → BZN 00:23 +1DL 2046	5h 46m	28%	23%

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 11m · leaves 05:00 1%

DFW · 1h 10m · leaves 05:00 7%

CLT · 1h 00m · leaves 05:07 10%

Afternoon and evening

DFW · 59m · leaves 14:59 36%

SLC · 50m · leaves 19:37 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.


American AA 4162 ORD 08:22 → MSP Delta DL 2946 MSP 13:17 → BZN Connection details →	3h 11m	7h 28m	98%	86%
Delta DL 1556 ORD 07:35 → LAX United UA 2212 LAX 12:50 → BZN Connection details →	2h 49m	9h 49m	95%	85%
American AA 1747 ORD 06:41 → DEN United UA 1248 DEN 11:32 → BZN Connection details →	3h 08m	7h 39m	99%	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