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 75-minute layover misses 2% of the time at 11 am and 16% of the time at 5 pm.

Nonstops


United	SLC	DEN	1h 41m	84%	0.5%	2,703	Flying now
Delta	SLC	DEN	1h 35m	81%	0.2%	1,696	Flying now
Frontier	SLC	DEN	1h 39m	80%	0.8%	1,023	Flying now
Southwest	SLC	DEN	1h 30m	74%	0.6%	2,306	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.


Southwest Details →	SLC 05:45 → SMF 06:25WN 4981	3h 50m Sacramento	SMF 10:15 → DEN 13:35WN 3774	7h 50m	98%	94%
United Details →	SLC 16:42 → LAX 17:53UA 5456 · flown by SkyWest	1h 52m Los Angeles	LAX 19:45 → DEN 23:15UA 2829	6h 33m	100%	92%
Southwest Details →	SLC 06:25 → LAS 06:50WN 4205	2h 05m Las Vegas	LAS 08:55 → DEN 11:50WN 247	5h 25m	100%	88%
United Details →	SLC 07:45 → LAX 09:15UA 5408 · flown by SkyWest	1h 40m Los Angeles	LAX 10:55 → DEN 14:27UA 2061	6h 42m	96%	87%
United Details →	SLC 16:21 → SFO 17:23UA 1955	2h 33m San Francisco	SFO 19:56 → DEN 23:43UA 2019	7h 22m	96%	84%
United Details →	SLC 06:45 → IAH 10:57UA 2366	1h 36m Houston	IAH 12:33 → DEN 14:17UA 2168	7h 32m	98%	83%
Delta Details →	SLC 06:00 → DTW 11:23DL 2289	1h 19m Detroit	DTW 12:42 → DEN 13:54DL 1648	7h 54m	98%	83%
Delta Details →	SLC 08:00 → MSP 11:32DL 2916	2h 55m Minneapolis	MSP 14:27 → DEN 15:38DL 1025	7h 38m	99%	79%
Tight connection: often missed
Alaska Details →	SLC 09:10 → SEA 10:35AS 3381 · flown by SkyWest	1h 09m Seattle	SEA 11:44 → DEN 15:38AS 535	6h 28m	70%	54%
United Details →	SLC 09:49 → SFO 11:13UA 5970 · flown by SkyWest	1h 30m San Francisco	SFO 12:43 → DEN 16:35UA 540	6h 46m	64%	49%
Southwest Details →	SLC 12:55 → SAN 13:50WN 3754	1h 05m San Diego	SAN 14:55 → DEN 18:20WN 3497	5h 25m	58%	18%

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

DTW · 1h 19m · leaves 06:00 2%

SFO · 1h 12m · leaves 06:05 5%

AUS · 1h 00m · leaves 06:05 7%

Afternoon and evening

ORD · 1h 05m · leaves 17:01 40%

LAS · 55m · leaves 20:30 50%

DAL · 50m · leaves 17:20 73%

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 3719 SLC 07:45 → RNO Southwest WN 3716 RNO 10:30 → DEN Connection details →	2h 05m	5h 55m	100%	96%
Southwest WN 4932 SLC 06:05 → AUS United UA 1541 AUS 12:55 → DEN Connection details →	3h 10m	8h 09m	100%	96%
Southwest WN 4981 SLC 05:45 → SMF United UA 2285 SMF 08:50 → DEN Connection details →	2h 25m	6h 31m	98%	95%

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