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

No clear winner: Southwest’s PHX → DAL flights land within a few points of 77% on time whatever the hour.

Nonstops


Southwest	PHX	DAL	2h 20m	77%	1.5%	2,889	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 Phoenix). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	PHX 05:10 → BNA 10:25WN 3235	1h 55m Nashville	BNA 12:20 → DAL 14:15WN 5046	7h 05m	100%	85%
Southwest Details →	PHX 05:05 → HOU 09:40WN 4668	1h 50m Houston	HOU 11:30 → DAL 12:40WN 22	5h 35m	100%	84%
Delta Details →	PHX 23:59 → ATL 06:39DL 929	1h 33m Atlanta	ATL 08:12 → DAL 09:24 +1DL 441	7h 27m	95%	83%
Southwest Details →	PHX 07:30 → LAS 08:40WN 2336	1h 58m Las Vegas	LAS 10:38 → DAL 15:25WN 2218	5h 56m	100%	82%
Delta Details →	PHX 05:45 → ATL 12:27DL 918	1h 32m Atlanta	ATL 13:59 → DAL 15:03DL 512	7h 27m	98%	81%
Southwest Details →	PHX 08:15 → BUR 09:40WN 3243	2h 05m Burbank	BUR 11:45 → DAL 16:50WN 2921	6h 35m	100%	81%
Southwest Details →	PHX 22:25 → BWI 05:40WN 1170	1h 10m Baltimore	BWI 06:50 → DAL 08:55 +1WN 4403	8h 30m	96%	79%
Southwest Details →	PHX 07:45 → ABQ 10:00WN 3228	3h 05m Albuquerque	ABQ 13:05 → DAL 15:50WN 106	6h 05m	100%	78%
Tight connection: often missed
Southwest Details →	PHX 13:45 → DEN 16:35WN 3264	1h 15m Denver	DEN 17:50 → DAL 21:00WN 1521	5h 15m	71%	27%
Southwest Details →	PHX 12:45 → BNA 18:00WN 3237	58m Nashville	BNA 18:58 → DAL 20:52WN 490	6h 08m	59%	25%
Southwest Details →	PHX 15:25 → DEN 18:10WN 3265	55m Denver	DEN 19:05 → DAL 22:05WN 1522	4h 40m	27%	6%

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

OAK · 1h 15m · leaves 07:45 2%

DEN · 1h 05m · leaves 06:15 4%

Afternoon and evening

HOU · 55m · leaves 10:25 50%

TPA · 55m · leaves 13:35 59%

DEN · 55m · leaves 15:25 73%

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 3992 PHX 07:17 → BUR Southwest WN 2921 BUR 11:45 → DAL Connection details →	3h 00m	7h 33m	99%	80%
American AA 1348 PHX 08:35 → ABQ Southwest WN 106 ABQ 13:05 → DAL Connection details →	2h 09m	5h 15m	97%	75%
Delta DL 929 PHX 23:59 → ATL Southwest WN 4394 ATL 08:55 → DAL Connection details →	2h 16m	8h 06m	95%	75%

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