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 FCA → DEN flights land within a few points of 85% on time whatever the hour.

Nonstops


United	FCA	DEN	2h 18m	85%	1.0%	1,010	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 →	FCA 13:20 → LAX 15:23UA 5427 · flown by SkyWest	3h 22m Los Angeles	LAX 18:45 → DEN 22:15UA 2610	8h 55m	98%	90%
United Details →	FCA 16:11 → SFO 17:50UA 5936 · flown by SkyWest	3h 10m San Francisco	SFO 21:00 → DEN 00:47 +1UA 301	8h 36m	99%	84%
Delta Details →	FCA 05:19 → SLC 07:05DL 2201	3h 10m Salt Lake City	SLC 10:15 → DEN 11:53DL 1553	6h 34m	97%	81%
Alaska Details →	FCA 06:33 → SEA 07:05AS 2122 · flown by Horizon	59m Seattle	SEA 08:04 → DEN 11:56AS 375	5h 23m	91%	79%
Delta Details →	FCA 06:55 → MSP 10:30DL 1578	3h 57m Minneapolis	MSP 14:27 → DEN 15:38DL 1025	8h 43m	99%	78%
Delta Details →	FCA 18:10 → SLC 20:00DL 3798 · flown by SkyWest	1h 05m Salt Lake City	SLC 21:05 → DEN 22:40DL 1667	4h 30m	93%	73%
Delta Details →	FCA 15:29 → MSP 19:11DL 2575	3h 04m Minneapolis	MSP 22:15 → DEN 23:27DL 1705	7h 58m	98%	69%
Delta Details →	FCA 13:29 → SLC 15:26DL 3804 · flown by SkyWest	3h 04m Salt Lake City	SLC 18:30 → DEN 20:02DL 1586	6h 35m	97%	69%
Tight connection: often missed
United Details →	FCA 16:11 → SFO 17:50UA 5936 · flown by SkyWest	1h 06m San Francisco	SFO 18:56 → DEN 22:44UA 2436	6h 33m	61%	53%
American Details →	FCA 16:48 → ORD 21:30AA 1844	1h 04m Chicago	ORD 22:34 → DEN 00:17 +1AA 1387	7h 28m	61%	33%

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

LAX · 47m · leaves 13:20 21%

ORD · 1h 04m · leaves 16:48 39%

SFO · 1h 06m · leaves 16:11 39%

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.


Alaska AS 2187 FCA 14:10 → SAN United UA 519 SAN 18:55 → DEN Connection details →	2h 39m	8h 17m	100%	87%
Delta DL 2201 FCA 05:19 → SLC United UA 2004 SLC 10:39 → DEN Connection details →	3h 34m	7h 05m	97%	87%
Alaska AS 2122 FCA 06:33 → SEA United UA 1505 SEA 08:56 → DEN Connection details →	1h 51m	6h 12m	94%	86%

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