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

Connect in the morning. The same one-hour layover misses 4% of the time at 8 am and 27% of the time at 7 pm.

Nonstops (seasonal or thin)


Delta	PHL	SLC	4h 57m	81%	1.2%	598	Flying now
American	PHL	SLC	5h 15m	74%	4.5%	220	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Salt Lake City on time. Total trip = scheduled departure to arrival, layover included (Salt Lake City is 2 h behind Philadelphia). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	PHL 05:15 → ATL 07:22DL 1269	2h 43m Atlanta	ATL 10:05 → SLC 12:10DL 387	8h 55m	99%	88%
Delta Details →	PHL 06:25 → ATL 08:32DL 1152	3h 22m Atlanta	ATL 11:54 → SLC 13:50DL 663	9h 25m	99%	84%
United Details →	PHL 08:00 → DEN 10:01UA 2307	3h 39m Denver	DEN 13:40 → SLC 15:13UA 1840	9h 13m	100%	84%
Delta Details →	PHL 08:05 → ATL 10:12DL 1180	3h 43m Atlanta	ATL 13:55 → SLC 15:51DL 423	9h 48m	98%	82%
Southwest Details →	PHL 05:00 → DEN 07:00WN 2664	3h 05m Denver	DEN 10:05 → SLC 11:45WN 4027	8h 40m	100%	80%
Delta Details →	PHL 15:38 → MSP 17:29DL 2679	2h 51m Minneapolis	MSP 20:20 → SLC 22:15DL 1051	8h 37m	94%	79%
American Details →	PHL 05:15 → ORD 06:38AA 1652	3h 27m Chicago	ORD 10:05 → SLC 12:35AA 2616	9h 21m	98%	78%
Delta Details →	PHL 10:40 → ATL 12:54DL 1100	2h 30m Atlanta	ATL 15:24 → SLC 17:24DL 526	8h 44m	99%	78%
Tight connection: often missed
Delta Details →	PHL 05:40 → MSP 07:23DL 2791	47m Minneapolis	MSP 08:10 → SLC 10:04DL 2628	6h 24m	74%	66%
Delta Details →	PHL 16:08 → ATL 18:25DL 2131	1h 00m Atlanta	ATL 19:25 → SLC 21:30DL 660	7h 22m	70%	52%
Delta Details →	PHL 17:22 → DTW 19:09DL 1391	1h 06m Detroit	DTW 20:15 → SLC 22:13DL 2117	6h 51m	73%	46%

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

CLT · 1h 07m · leaves 06:00 4%

IAH · 1h 01m · leaves 06:15 4%

DFW · 1h 02m · leaves 05:00 6%

Afternoon and evening

CLT · 47m · leaves 15:52 30%

DFW · 58m · leaves 15:00 33%

DEN · 58m · leaves 16:14 43%

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.


American AA 3090 PHL 08:20 → PDX Alaska AS 3120 PDX 14:30 → SLC Connection details →	2h 57m	11h 09m	98%	94%
American AA 942 PHL 08:50 → MSY Delta DL 736 MSY 13:30 → SLC Connection details →	2h 35m	9h 18m	100%	92%
American AA 2720 PHL 09:00 → STL Delta DL 2455 STL 14:28 → SLC Connection details →	3h 52m	9h 40m	100%	90%

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