Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

Take the nonstop: Southwest DAL → SFO (3h 45m) reaches San Francisco on time 7 times in 10; the most reliable connection, Southwest via Phoenix (6h 15m), 44%.

Nonstops (seasonal or thin)


Southwest	DAL	SFO	3h 45m	73%	2.0%	149	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

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


Southwest + Unitedtwo ticketsDetails →	DAL 11:50 → SAN 12:45WN 1394	3h 24m San Diego	SAN 16:09 → SFO 17:49UA 2117	7h 59m	100%	76%
Southwest + Unitedtwo ticketsDetails →	DAL 08:40 → DEN 09:45WN 239	3h 40m Denver	DEN 13:25 → SFO 15:09UA 1812	8h 29m	97%	69%
Southwest + Unitedtwo ticketsDetails →	DAL 06:10 → SAN 07:05WN 1393	3h 56m San Diego	SAN 11:01 → SFO 12:47UA 2309	8h 37m	100%	68%
Southwest + Unitedtwo ticketsDetails →	DAL 11:35 → DEN 12:35WN 3563	3h 12m Denver	DEN 15:47 → SFO 17:30UA 2633	7h 55m	97%	68%
Southwest + Unitedtwo ticketsDetails →	DAL 07:50 → SAN 08:50WN 192	3h 05m San Diego	SAN 11:55 → SFO 13:41UA 2428	7h 51m	97%	68%
Southwest + Frontiertwo ticketsDetails →	DAL 06:00 → DEN 07:00WN 1296	2h 47m Denver	DEN 09:47 → SFO 11:43F9 1229	7h 43m	100%	66%
Southwest + Unitedtwo ticketsDetails →	DAL 11:10 → LAX 12:20WN 1327	3h 54m Los Angeles	LAX 16:14 → SFO 17:42UA 2019	8h 32m	96%	66%
Delta Details →	DAL 12:19 → ATL 15:31DL 1115	2h 37m Atlanta	ATL 18:08 → SFO 20:05DL 517	9h 48m	96%	65%
Tight connection: often missed
Southwest Details →	DAL 17:50 → SAN 18:45WN 40	1h 25m San Diego	SAN 20:10 → SFO 21:55WN 4772	6h 00m	65%	8%
Southwest Details →	DAL 19:10 → DEN 20:30WN 1304	1h 10m Denver	DEN 21:40 → SFO 23:25WN 4303	6h 15m	67%	7%
Southwest Details →	DAL 10:40 → LAS 11:25WN 486	55m Las Vegas	LAS 12:20 → SFO 13:55WN 2343	5h 15m	56%	4%

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

LAS · 1h 08m · leaves 06:05 2%

DEN · 48m · leaves 06:00 16%

Afternoon and evening

DEN · 1h 10m · leaves 19:10 33%

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.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

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