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

No clear winner: United’s JAC → DEN flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops


United	JAC	DEN	1h 40m	80%	1.4%	1,631	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 →	JAC 08:00 → LAX 09:31UA 2811	1h 24m Los Angeles	LAX 10:55 → DEN 14:27UA 2061	6h 27m	97%	88%
Delta Details →	JAC 07:39 → SLC 08:55DL 4022 · flown by SkyWest	1h 20m Salt Lake City	SLC 10:15 → DEN 11:53DL 1553	4h 14m	96%	81%
Delta Details →	JAC 18:05 → SLC 19:09DL 417	1h 56m Salt Lake City	SLC 21:05 → DEN 22:40DL 1667	4h 35m	98%	78%
Alaska Details →	JAC 12:00 → SEA 13:22AS 3363 · flown by SkyWest	3h 04m Seattle	SEA 16:26 → DEN 20:10AS 602	8h 10m	98%	72%
United Details →	JAC 07:30 → ORD 11:40UA 2032	1h 16m Chicago	ORD 12:56 → DEN 14:46UA 1150	7h 16m	87%	71%
United Details →	JAC 12:33 → ORD 16:43UA 2357	1h 34m Chicago	ORD 18:17 → DEN 20:22UA 1974	7h 49m	80%	44%
American Details →	JAC 11:50 → DFW 15:45AA 1923	2h 45m Dallas-Fort Worth	DFW 18:30 → DEN 19:41AA 2235	7h 51m	91%	40%
American Details →	JAC 16:14 → DFW 20:08AA 883	2h 37m Dallas-Fort Worth	DFW 22:45 → DEN 23:55AA 662	7h 41m	88%	36%
Tight connection: often missed
United Details →	JAC 08:00 → SFO 09:26UA 336	1h 14m San Francisco	SFO 10:40 → DEN 14:23UA 1604	6h 23m	41%	28%

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 20m · leaves 07:39 4%

ORD · 1h 16m · leaves 07:30 13%

SFO · 1h 14m · leaves 08:00 59%

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 4022 JAC 07:39 → SLC Southwest WN 1478 SLC 12:20 → DEN Connection details →	3h 25m	6h 11m	100%	85%
Delta DL 3931 JAC 07:00 → MSP United UA 1305 MSP 13:36 → DEN Connection details →	3h 09m	7h 48m	98%	85%
Delta DL 417 JAC 18:05 → SLC Frontier F9 4252 SLC 22:50 → DEN Connection details →	3h 41m	6h 33m	98%	78%

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