Sun, Oct 4 has passed, so this is the 12-month record.

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 DEN → SUN flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops (seasonal or thin)


United	DEN	SUN	2h 02m	81%	0.0%	630	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	DEN 06:04 → LAX 07:34UA 1093	2h 28m Los Angeles	LAX 10:02 → SUN 13:16UA 5980 · flown by SkyWest	7h 12m	100%	100%
United Details →	DEN 13:26 → LAX 14:57UA 774	3h 48m Los Angeles	LAX 18:45 → SUN 22:01UA 6043 · flown by SkyWest	8h 35m	99%	96%
Delta Details →	DEN 15:55 → SLC 17:34DL 1623	3h 31m Salt Lake City	SLC 21:05 → SUN 22:09DL 3985 · flown by SkyWest	6h 14m	97%	91%
Delta Details →	DEN 07:05 → SLC 08:36DL 1581	2h 39m Salt Lake City	SLC 11:15 → SUN 12:29DL 3973 · flown by SkyWest	5h 24m	96%	88%
United Details →	DEN 13:25 → SFO 15:09UA 1812	3h 46m San Francisco	SFO 18:55 → SUN 21:51UA 5986 · flown by SkyWest	8h 26m	99%	76%
United Details →	DEN 11:15 → ORD 14:55UA 2865	1h 05m Chicago	ORD 16:00 → SUN 18:58UA 5416 · flown by SkyWest	7h 43m	85%	66%
Alaska Details →	DEN 12:55 → SEA 14:53AS 381	1h 32m Seattle	SEA 16:25 → SUN 19:01AS 2322 · flown by Horizon	6h 06m	94%	57%

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.


Frontier F9 3219 DEN 06:00 → SLC Delta DL 3973 SLC 11:15 → SUN Connection details →	3h 44m	6h 29m	99%	90%
United UA 497 DEN 08:00 → SLC Delta DL 3689 SLC 13:25 → SUN Connection details →	3h 48m	6h 34m	99%	89%
United UA 5261 DEN 16:29 → SLC Delta DL 3985 SLC 21:05 → SUN Connection details →	2h 55m	5h 40m	92%	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