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

Connect in the morning. The same one-hour layover misses 8% of the time at 9 am and 2 times in 5 at 9 pm.

Nonstops


United	DEN	IDA	1h 46m	82%	0.5%	1,689	Flying now
Allegiant	DEN	IDA	–	89%few flights	0.0%	9	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	DEN 05:40 → SLC 07:13DL 2544	2h 22m Salt Lake City	SLC 09:35 → IDA 10:43DL 3944 · flown by SkyWest	5h 03m	97%	90%
Delta Details →	DEN 12:45 → SLC 14:18DL 1553	2h 52m Salt Lake City	SLC 17:10 → IDA 18:18DL 3895 · flown by SkyWest	5h 32m	99%	87%
American Details →	DEN 05:00 → DFW 08:05AA 2612	2h 07m Dallas-Fort Worth	DFW 10:12 → IDA 12:23AA 6219 · flown by SkyWest	7h 23m	97%	86%
Delta Details →	DEN 15:55 → SLC 17:34DL 1623	3h 56m Salt Lake City	SLC 21:30 → IDA 22:31DL 2608	6h 36m	97%	75%
Alaska Details →	DEN 08:40 → SEA 10:42AS 317	2h 03m Seattle	SEA 12:45 → IDA 15:37AS 3490 · flown by SkyWest	6h 57m	98%	69%
Alaska Details →	DEN 16:36 → SEA 18:38AS 535	1h 12m Seattle	SEA 19:50 → IDA 22:39AS 3423 · flown by SkyWest	6h 03m	80%	63%
American Details →	DEN 15:11 → DFW 18:21AA 420	1h 44m Dallas-Fort Worth	DFW 20:05 → IDA 22:15AA 6467 · flown by SkyWest	7h 02m	85%	55%
Tight connection: often missed
Delta Details →	DEN 19:00 → SLC 20:38DL 2663	52m Salt Lake City	SLC 21:30 → IDA 22:31DL 2608	3h 31m	61%	48%

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 · 59m · leaves 07:05 8%

Afternoon and evening

SEA · 1h 12m · leaves 16:36 20%

SLC · 52m · leaves 19:00 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.


United UA 497 DEN 08:00 → SLC Delta DL 3765 SLC 13:30 → IDA Connection details →	3h 53m	6h 37m	99%	93%
Southwest WN 1731 DEN 11:45 → SLC Delta DL 3895 SLC 17:10 → IDA Connection details →	3h 45m	6h 32m	100%	89%
Frontier F9 3219 DEN 06:00 → SLC Delta DL 3944 SLC 09:35 → IDA Connection details →	2h 04m	4h 43m	91%	84%

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