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, any airlines

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 + Frontiertwo ticketsDetails →	DAL 06:00 → LAX 07:10WN 1326	2h 08m Los Angeles	LAX 09:18 → PDX 11:41F9 4499	7h 41m	100%	95%
Southwest + Alaskatwo ticketsDetails →	DAL 07:40 → SMF 09:15WN 4218	2h 31m Sacramento	SMF 11:46 → PDX 13:18AS 621	7h 38m	88%	86%
Southwest + Alaskatwo ticketsDetails →	DAL 06:10 → SAN 07:05WN 1393	3h 59m San Diego	SAN 11:04 → PDX 13:43AS 576	9h 33m	100%	86%
Southwest + Deltatwo ticketsDetails →	DAL 07:00 → SLC 08:40WN 1408	2h 35m Salt Lake City	SLC 11:15 → PDX 12:10DL 1209	7h 10m	98%	86%
Southwest + Alaskatwo ticketsDetails →	DAL 08:15 → SEA 10:30WN 1406	3h 15m Seattle	SEA 13:45 → PDX 14:48AS 3204 · flown by SkyWest	8h 33m	97%	85%
Southwest + Frontiertwo ticketsDetails →	DAL 10:45 → DEN 11:45WN 4394	3h 23m Denver	DEN 15:08 → PDX 16:51F9 2553	8h 08m	98%	85%
Southwest Details →	DAL 06:00 → MDW 08:15WN 1355	1h 50m Chicago	MDW 10:05 → PDX 12:25WN 2809	8h 25m	100%	84%
Southwest + Alaskatwo ticketsDetails →	DAL 10:25 → PHX 10:55WN 1166	3h 09m Phoenix	PHX 14:04 → PDX 16:46AS 742	8h 21m	100%	84%
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.

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