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 PDX → DAL flights land within a few points of 3 in 5 on time whatever the hour.

Nonstops (seasonal or thin)


Southwest	PDX	DAL	3h 40m	60%	0.0%	230	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 Portland). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	PDX 22:55 → ATL 06:27DL 564	3h 48m Atlanta	ATL 10:15 → DAL 11:24 +1DL 1115	10h 29m	98%	87%
Southwest Details →	PDX 23:30 → MDW 05:20WN 3203	1h 20m Chicago	MDW 06:40 → DAL 09:00 +1WN 3796	7h 30m	91%	82%
Southwest Details →	PDX 05:00 → LAS 07:10WN 344	3h 28m Las Vegas	LAS 10:38 → DAL 15:25WN 2218	8h 26m	96%	79%
Southwest Details →	PDX 21:20 → BWI 05:15WN 3194	1h 35m Baltimore	BWI 06:50 → DAL 08:55 +1WN 4403	9h 35m	93%	77%
Delta Details →	PDX 11:40 → ATL 19:26DL 539	1h 49m Atlanta	ATL 21:15 → DAL 22:34DL 1104	8h 54m	97%	76%
Delta Details →	PDX 06:35 → ATL 14:20DL 662	2h 18m Atlanta	ATL 16:38 → DAL 17:55DL 2780	9h 20m	99%	75%
Southwest Details →	PDX 05:20 → PHX 07:55WN 4666	3h 00m Phoenix	PHX 10:55 → DAL 15:20WN 3255	8h 00m	98%	72%
Southwest Details →	PDX 09:15 → PHX 11:50WN 3207	1h 35m Phoenix	PHX 13:25 → DAL 17:50WN 3256	6h 35m	100%	67%
Tight connection: often missed
Southwest Details →	PDX 14:05 → PHX 16:45WN 3208	1h 05m Phoenix	PHX 17:50 → DAL 22:15WN 1347	6h 10m	45%	17%

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

MDW · 1h 20m · leaves 23:30 9%

DEN · 50m · leaves 05:50 11%

Afternoon and evening

PHX · 1h 05m · leaves 14:05 55%

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.


Alaska AS 2268 PDX 07:01 → ABQ Southwest WN 106 ABQ 13:05 → DAL Connection details →	2h 08m	6h 49m	98%	76%
Delta DL 564 PDX 22:55 → ATL Southwest WN 4394 ATL 08:55 → DAL Connection details →	2h 28m	9h 10m	93%	72%
American AA 2658 PDX 05:20 → PHX Southwest WN 3255 PHX 10:55 → DAL Connection details →	2h 55m	8h 00m	96%	70%

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