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 6% of the time at 8 am and 30% of the time at 7 pm.

Nonstops


Delta	ATL	SAN	4h 29m	80%	0.6%	2,168	Flying now
Alaska	ATL	SAN	4h 52m	84%	0.0%	211	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 Atlanta). Layovers up to 4 hours. Pick a connection for the details.


United Details →	ATL 05:30 → IAD 07:20UA 641	1h 06m Dulles	IAD 08:26 → SAN 10:49UA 1930	8h 19m	98%	90%
Delta Details →	ATL 17:58 → LAX 19:39DL 500	3h 01m Los Angeles	LAX 22:40 → SAN 23:40DL 3746 · flown by SkyWest	8h 42m	98%	84%
United Details →	ATL 11:10 → DEN 12:28UA 1327	3h 27m Denver	DEN 15:55 → SAN 17:20UA 1281	9h 10m	98%	84%
Delta Details →	ATL 09:52 → SEA 12:20DL 774	3h 05m Seattle	SEA 15:25 → SAN 18:13DL 2613	11h 21m	99%	83%
Delta Details →	ATL 11:54 → SLC 13:50DL 663	3h 20m Salt Lake City	SLC 17:10 → SAN 18:06DL 1252	9h 12m	99%	83%
Delta Details →	ATL 12:35 → LAX 14:15DL 895	4h 00m Los Angeles	LAX 18:15 → SAN 19:16DL 4087 · flown by SkyWest	9h 41m	99%	83%
United Details →	ATL 07:05 → IAH 08:15UA 532	3h 45m Houston	IAH 12:00 → SAN 13:21UA 2399	9h 16m	99%	81%
Delta Details →	ATL 17:55 → SLC 19:58DL 653	2h 57m Salt Lake City	SLC 22:55 → SAN 23:50DL 1202	8h 58m	98%	81%
Tight connection: often missed
Delta Details →	ATL 16:43 → JFK 19:29DL 2378	1h 00m New York	JFK 20:29 → SAN 23:39DL 685	9h 56m	70%	50%
American Details →	ATL 14:10 → PHL 16:25AA 621	1h 35m Philadelphia	PHL 18:00 → SAN 20:50AA 1333	9h 40m	75%	49%
Delta Details →	ATL 11:00 → LAS 12:10DL 466	46m Las Vegas	LAS 12:56 → SAN 14:17DL 3741 · flown by SkyWest	6h 17m	57%	44%

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 06m · leaves 05:30 2%

IAH · 1h 15m · leaves 07:05 6%

DTW · 1h 20m · leaves 09:18 6%

Afternoon and evening

BWI · 55m · leaves 18:15 59%

PHX · 55m · leaves 18:13 61%

SFO · 50m · leaves 18:00 64%

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.


Southwest WN 202 ATL 09:30 → DEN United UA 1302 DEN 13:30 → SAN Connection details →	2h 50m	8h 25m	100%	87%
Delta DL 706 ATL 11:45 → DEN United UA 1281 DEN 15:55 → SAN Connection details →	2h 56m	8h 35m	99%	84%
Delta DL 1151 ATL 10:50 → MKE Southwest WN 2956 MKE 14:30 → SAN Connection details →	2h 39m	8h 50m	98%	83%

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