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

No clear winner: Delta’s SLC → SUN flights land within a few points of 94% on time whatever the hour.

Nonstops


Delta	SLC	SUN	1h 09m	94%	0.7%	1,078	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 →	SLC 16:42 → LAX 17:53UA 5456 · flown by SkyWest	52m Los Angeles	LAX 18:45 → SUN 22:01UA 6043 · flown by SkyWest	5h 19m	95%	92%
United Details →	SLC 07:00 → DEN 08:42UA 1232	3h 02m Denver	DEN 11:44 → SUN 13:47UA 5554 · flown by SkyWest	6h 47m	99%	86%
United Details →	SLC 16:21 → SFO 17:23UA 1955	1h 32m San Francisco	SFO 18:55 → SUN 21:51UA 5986 · flown by SkyWest	5h 30m	80%	62%
United Details →	SLC 14:28 → DEN 16:11UA 1662	3h 14m Denver	DEN 19:25 → SUN 21:26UA 5734 · flown by SkyWest	6h 58m	97%	61%
Alaska Details →	SLC 11:17 → SEA 12:30AS 796	3h 55m Seattle	SEA 16:25 → SUN 19:01AS 2322 · flown by Horizon	7h 44m	99%	59%
Tight connection: often missed
United Details →	SLC 07:45 → LAX 09:15UA 5408 · flown by SkyWest	47m Los Angeles	LAX 10:02 → SUN 13:16UA 5980 · flown by SkyWest	5h 31m	74%	74%

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 17m · leaves 08:30 10%

LAX · 47m · leaves 07:45 26%

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 841 SLC 15:40 → LAX United UA 6043 LAX 18:45 → SUN Connection details →	2h 09m	6h 21m	93%	90%
Southwest WN 3738 SLC 07:45 → DEN United UA 5554 DEN 11:44 → SUN Connection details →	2h 29m	6h 02m	98%	86%
Delta DL 1088 SLC 15:10 → SFO United UA 5986 SFO 18:55 → SUN Connection details →	2h 43m	6h 41m	91%	70%

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