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 1 time in 10 at 7 am and almost half the time at 9 pm.

Nonstops


Delta	DTW	SAN	4h 46m	76%	0.9%	1,253	Flying now
Spirit	DTW	SAN	4h 48m	89%few flights	2.7%	37	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach San Diego on time. Total trip = scheduled departure to arrival, layover included (San Diego is 3 h behind Detroit). Layovers up to 4 hours. Pick a connection for the details.


United Details →	DTW 06:15 → IAH 08:11UA 1229	1h 19m Houston	IAH 09:30 → SAN 10:51UA 2491	7h 36m	100%	85%
Southwest Details →	DTW 05:30 → DEN 06:35WN 1778	1h 40m Denver	DEN 08:15 → SAN 09:40WN 1699	7h 10m	98%	85%
Delta Details →	DTW 06:17 → ATL 08:12DL 1611	3h 41m Atlanta	ATL 11:53 → SAN 13:21DL 540	10h 04m	99%	84%
Delta Details →	DTW 12:25 → SLC 14:19DL 935	2h 51m Salt Lake City	SLC 17:10 → SAN 18:06DL 1252	8h 41m	99%	83%
Delta Details →	DTW 07:00 → SLC 08:54DL 3229	2h 21m Salt Lake City	SLC 11:15 → SAN 12:17DL 1296	8h 17m	100%	83%
Delta Details →	DTW 12:38 → LAX 14:28DL 634	3h 47m Los Angeles	LAX 18:15 → SAN 19:16DL 4087 · flown by SkyWest	9h 38m	100%	83%
Delta Details →	DTW 18:20 → LAX 20:12DL 852	2h 28m Los Angeles	LAX 22:40 → SAN 23:40DL 3746 · flown by SkyWest	8h 20m	96%	82%
Delta Details →	DTW 17:40 → SLC 19:38DL 765	3h 17m Salt Lake City	SLC 22:55 → SAN 23:50DL 1202	9h 13m	99%	81%
Tight connection: often missed
Delta Details →	DTW 16:46 → SEA 18:45DL 944	1h 00m Seattle	SEA 19:45 → SAN 22:38DL 2672	8h 52m	72%	53%
Delta Details →	DTW 14:01 → BOS 16:10DL 1171	1h 00m Boston	BOS 17:10 → SAN 20:26DL 571	9h 25m	70%	48%
American Details →	DTW 11:51 → DFW 13:45AA 1792	57m Dallas-Fort Worth	DFW 14:42 → SAN 15:40AA 2485	6h 48m	75%	30%

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

MDW · 1h 13m · leaves 08:40 6%

DFW · 1h 12m · leaves 07:58 9%

ATL · 55m · leaves 05:17 11%

Afternoon and evening

SFO · 1h 20m · leaves 17:29 33%

DFW · 1h 11m · leaves 19:51 44%

MSP · 47m · leaves 20:05 48%

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 1113 DTW 08:40 → DEN United UA 1302 DEN 13:30 → SAN Connection details →	3h 37m	9h 15m	99%	86%
Frontier F9 1263 DTW 06:10 → ATL Delta DL 540 ATL 11:53 → SAN Connection details →	3h 22m	10h 11m	97%	82%
Delta DL 2884 DTW 08:50 → IAD United UA 2163 IAD 12:40 → SAN Connection details →	2h 17m	9h 13m	96%	81%

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