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 DAL → PDX flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops (seasonal or thin)


Southwest	DAL	PDX	4h 00m	80%	0.4%	230	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	DAL 06:00 → MDW 08:15WN 1355	1h 50m Chicago	MDW 10:05 → PDX 12:25WN 2809	8h 25m	100%	84%
Southwest Details →	DAL 06:05 → LAS 06:50WN 1318	2h 30m Las Vegas	LAS 09:20 → PDX 11:40WN 4132	7h 35m	100%	83%
Southwest Details →	DAL 06:00 → PHX 06:28WN 1379	1h 22m Phoenix	PHX 07:50 → PDX 10:25WN 4092	6h 25m	100%	79%
Delta Details →	DAL 06:05 → ATL 09:15DL 516	1h 45m Atlanta	ATL 11:00 → PDX 13:00DL 2206	8h 55m	95%	77%
Southwest Details →	DAL 06:00 → DEN 07:00WN 1296	2h 35m Denver	DEN 09:35 → PDX 11:10WN 1667	7h 10m	100%	77%
Delta Details →	DAL 10:09 → ATL 13:20DL 441	3h 32m Atlanta	ATL 16:52 → PDX 18:56DL 503	10h 47m	98%	71%
Southwest Details →	DAL 08:50 → PHX 09:20WN 4410	2h 15m Phoenix	PHX 11:35 → PDX 14:10WN 2310	7h 20m	97%	69%
Southwest Details →	DAL 16:35 → LAS 17:25WN 1322	2h 30m Las Vegas	LAS 19:55 → PDX 22:10WN 2307	7h 35m	92%	63%
Tight connection: often missed
Southwest Details →	DAL 07:40 → SMF 09:15WN 4218	57m Sacramento	SMF 10:12 → PDX 11:42WN 949	6h 02m	67%	59%
Southwest Details →	DAL 17:55 → DEN 19:25WN 1303	1h 40m Denver	DEN 21:05 → PDX 22:45WN 1671	6h 52m	73%	23%
Southwest Details →	DAL 12:35 → SJC 14:05WN 1407	55m San Jose	SJC 15:00 → PDX 16:40WN 2433	6h 05m	33%	23%

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

SMF · 57m · leaves 07:40 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.


Southwest WN 1326 DAL 06:00 → LAX Frontier F9 4499 LAX 09:18 → PDX Connection details →	2h 08m	7h 41m	100%	95%
Southwest WN 4218 DAL 07:40 → SMF Alaska AS 621 SMF 11:46 → PDX Connection details →	2h 31m	7h 38m	88%	86%
Southwest WN 1393 DAL 06:10 → SAN Alaska AS 576 SAN 11:04 → PDX Connection details →	3h 59m	9h 33m	100%	86%

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