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 70-minute layover misses 4% of the time at 8 am and 36% of the time at 10 pm.

Nonstops


American	PHL	SAN	5h 51m	81%	1.4%	1,046	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 Philadelphia). Layovers up to 4 hours. Pick a connection for the details.


United Details →	PHL 06:10 → IAD 07:19UA 3693 · flown by Republic	1h 07m Dulles	IAD 08:26 → SAN 10:49UA 1930	7h 39m	97%	89%
United Details →	PHL 08:00 → DEN 10:01UA 2307	3h 29m Denver	DEN 13:30 → SAN 14:55UA 1302	9h 55m	100%	87%
Southwest Details →	PHL 05:00 → DEN 07:00WN 2664	1h 15m Denver	DEN 08:15 → SAN 09:40WN 1699	7h 40m	100%	86%
United Details →	PHL 10:00 → DEN 12:01UA 1537	3h 54m Denver	DEN 15:55 → SAN 17:20UA 1281	10h 20m	100%	85%
Delta Details →	PHL 06:25 → ATL 08:32DL 1152	3h 21m Atlanta	ATL 11:53 → SAN 13:21DL 540	9h 56m	99%	83%
United Details →	PHL 06:15 → IAH 08:44UA 584	3h 16m Houston	IAH 12:00 → SAN 13:21UA 2399	10h 06m	100%	82%
Delta Details →	PHL 10:40 → ATL 12:54DL 1100	2h 42m Atlanta	ATL 15:36 → SAN 17:00DL 843	9h 21m	99%	78%
American Details →	PHL 06:00 → CLT 07:53AA 3139	3h 22m Charlotte	CLT 11:15 → SAN 13:05AA 466	10h 05m	99%	78%
Tight connection: often missed
Alaska Details →	PHL 07:33 → SEA 10:32AS 277	54m Seattle	SEA 11:26 → SAN 14:18AS 1346	9h 45m	71%	38%
United Details →	PHL 16:14 → DEN 18:25UA 2644	55m Denver	DEN 19:20 → SAN 20:46UA 540	7h 32m	53%	34%
American Details →	PHL 17:38 → DFW 20:25AA 2947	1h 09m Dallas-Fort Worth	DFW 21:34 → SAN 22:37AA 1011	7h 59m	64%	19%

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

IAD · 1h 07m · leaves 06:10 3%

ORD · 1h 16m · leaves 06:00 4%

DFW · 1h 16m · leaves 07:09 5%

Afternoon and evening

DFW · 1h 09m · leaves 17:38 36%

DEN · 55m · leaves 16:14 47%

MDW · 50m · leaves 18:55 51%

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 3312 PHL 09:35 → DEN United UA 1281 DEN 15:55 → SAN Connection details →	3h 59m	10h 45m	100%	85%
American AA 2534 PHL 08:35 → SEA Delta DL 2613 SEA 15:25 → SAN Connection details →	3h 43m	12h 38m	97%	81%
American AA 824 PHL 08:30 → LAX Delta DL 4001 LAX 14:11 → SAN Connection details →	2h 47m	9h 41m	97%	79%

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