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 82% on time.

Nonstops


United	MSO	DEN	2h 10m	82%	0.5%	1,190	Flying now
Frontier	MSO	DEN	2h 12m	86%few flights	0.0%	14	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Denver on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


United Details →	MSO 07:15 → LAX 09:17UA 4741 · flown by SkyWest	1h 38m Los Angeles	LAX 10:55 → DEN 14:27UA 2061	7h 12m	100%	91%
United Details →	MSO 16:19 → SFO 17:50UA 5417 · flown by SkyWest	2h 06m San Francisco	SFO 19:56 → DEN 23:43UA 2019	7h 24m	97%	84%
Delta Details →	MSO 05:31 → SLC 07:04DL 2795	3h 11m Salt Lake City	SLC 10:15 → DEN 11:53DL 1553	6h 22m	97%	81%
Delta Details →	MSO 05:55 → MSP 09:30DL 2907	1h 30m Minneapolis	MSP 11:00 → DEN 12:10DL 2927	6h 15m	97%	79%
American Details →	MSO 06:45 → DFW 11:09AA 3924 · flown by Envoy	2h 08m Dallas-Fort Worth	DFW 13:17 → DEN 14:21AA 420	7h 36m	99%	74%
Delta Details →	MSO 15:29 → MSP 19:09DL 362	3h 06m Minneapolis	MSP 22:15 → DEN 23:27DL 1705	7h 58m	98%	70%
Alaska Details →	MSO 11:22 → SEA 12:02AS 3100 · flown by SkyWest	1h 31m Seattle	SEA 13:33 → DEN 17:20AS 242	5h 58m	98%	69%
Delta Details →	MSO 13:17 → SLC 15:00DL 4112 · flown by SkyWest	3h 30m Salt Lake City	SLC 18:30 → DEN 20:02DL 1586	6h 47m	99%	68%
Tight connection: often missed
United Details →	MSO 16:19 → SFO 17:50UA 5417 · flown by SkyWest	1h 06m San Francisco	SFO 18:56 → DEN 22:44UA 2436	6h 25m	56%	49%

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.

Afternoon and evening

SEA · 1h 19m · leaves 17:00 13%

SLC · 50m · leaves 18:29 15%

SFO · 1h 06m · leaves 16:19 44%

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 2907 MSO 05:55 → MSP United UA 2232 MSP 11:34 → DEN Connection details →	2h 04m	6h 50m	95%	89%
Delta DL 2795 MSO 05:31 → SLC United UA 2004 SLC 10:39 → DEN Connection details →	3h 35m	6h 53m	97%	87%
Alaska AS 561 MSO 07:03 → SEA United UA 757 SEA 11:02 → DEN Connection details →	3h 17m	7h 48m	100%	87%

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