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

The nonstop is quickest: Southwest SFO → DAL (3h 35m), on time 1 time in 4. Southwest via Denver (6h 00m) is more reliable, 70%, but takes 2h 25m longer.

Nonstops (seasonal or thin)


Southwest	SFO	DAL	3h 35m	25%	0.7%	149	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	SFO 22:59 → ATL 06:40DL 495	3h 35m Atlanta	ATL 10:15 → DAL 11:24 +1DL 1115	10h 25m	100%	90%
Delta Details →	SFO 21:56 → ATL 05:37DL 517	2h 35m Atlanta	ATL 08:12 → DAL 09:24 +1DL 441	9h 30m	93%	78%
Delta Details →	SFO 11:38 → ATL 19:27DL 693	1h 48m Atlanta	ATL 21:15 → DAL 22:34DL 1104	8h 56m	95%	76%
Delta Details →	SFO 06:00 → ATL 13:40DL 570	2h 58m Atlanta	ATL 16:38 → DAL 17:55DL 2780	9h 55m	98%	74%
Southwest Details →	SFO 05:30 → PHX 07:30WN 4145	3h 25m Phoenix	PHX 10:55 → DAL 15:20WN 3255	7h 50m	100%	74%
Southwest Details →	SFO 22:50 → BNA 05:10WN 3634	2h 55m Nashville	BNA 08:05 → DAL 10:00 +1WN 486	9h 10m	97%	71%
Southwest Details →	SFO 05:10 → DEN 08:40WN 1424	1h 25m Denver	DEN 10:05 → DAL 13:10WN 1518	6h 00m	96%	70%
Southwest Details →	SFO 13:20 → LAS 15:00WN 3644	2h 20m Las Vegas	LAS 17:20 → DAL 22:10WN 2220	6h 50m	88%	62%
Tight connection: often missed
Southwest Details →	SFO 21:10 → BWI 05:25WN 2683	1h 25m Baltimore	BWI 06:50 → DAL 08:55 +1WN 4403	9h 45m	71%	59%
Southwest Details →	SFO 11:00 → SAN 12:40WN 3496	1h 15m San Diego	SAN 13:55 → DAL 19:02WN 4097	6h 03m	8%	2%
Southwest Details →	SFO 14:35 → DEN 18:10WN 3641	55m Denver	DEN 19:05 → DAL 22:05WN 1522	5h 30m	7%	2%

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 15m · leaves 05:00 5%

Afternoon and evening

ATL · 1h 05m · leaves 07:50 9%

DEN · 55m · leaves 14:35 93%

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.


Frontier F9 3440 SFO 21:39 → DEN Southwest WN 1078 DEN 05:10 → DAL Connection details →	3h 36m	8h 26m	94%	90%
United UA 1807 SFO 23:59 → AUS Southwest WN 1271 AUS 08:05 → DAL Connection details →	2h 19m	7h 11m	97%	86%
United UA 1603 SFO 21:20 → ATL Delta DL 441 ATL 08:12 → DAL Connection details →	2h 52m	10h 06m	97%	84%

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