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

Connect in the morning. The same one-hour layover misses 1 time in 10 at 10 am and 1 time in 3 at 8 pm.

Nonstops (seasonal or thin)


Delta	DTW	PDX	4h 47m	71%	1.1%	379	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 3 h behind Detroit). Layovers up to 4 hours. Pick a connection for the details.


Delta + Alaskatwo ticketsDetails →	DTW 07:00 → SLC 08:54DL 3229	3h 52m Salt Lake City	SLC 12:46 → PDX 13:49AS 3117 · flown by SkyWest	9h 49m	100%	92%
Delta + Unitedtwo ticketsDetails →	DTW 08:40 → DEN 09:53DL 1113	3h 34m Denver	DEN 13:27 → PDX 15:13UA 2455	9h 33m	99%	89%
Delta + Alaskatwo ticketsDetails →	DTW 06:00 → SEA 07:55DL 814	2h 19m Seattle	SEA 10:14 → PDX 11:21AS 3090 · flown by SkyWest	8h 21m	94%	89%
Delta + Alaskatwo ticketsDetails →	DTW 12:38 → LAX 14:28DL 634	3h 59m Los Angeles	LAX 18:27 → PDX 20:48AS 1397	11h 10m	100%	88%
Delta Details →	DTW 17:40 → SLC 19:38DL 765	3h 12m Salt Lake City	SLC 22:50 → PDX 23:44DL 1373	9h 05m	99%	88%
Delta + Alaskatwo ticketsDetails →	DTW 09:20 → SNA 11:06DL 1857	2h 59m Santa Ana	SNA 14:05 → PDX 16:29AS 712	10h 09m	97%	87%
United Details →	DTW 06:15 → IAH 08:11UA 1229	1h 19m Houston	IAH 09:30 → PDX 11:56UA 740	8h 41m	100%	86%
Delta + Alaskatwo ticketsDetails →	DTW 15:50 → LAX 17:39DL 883	3h 56m Los Angeles	LAX 21:35 → PDX 23:56AS 207	11h 06m	99%	86%
Tight connection: often missed
Alaska Details →	DTW 17:31 → SEA 19:33AS 313	52m Seattle	SEA 20:25 → PDX 21:22AS 2387 · flown by Horizon	6h 51m	66%	54%
United Details →	DTW 17:29 → SFO 19:40UA 1863	1h 10m San Francisco	SFO 20:50 → PDX 22:48UA 2413	8h 19m	67%	37%
Southwest Details →	DTW 20:25 → MDW 20:35WN 1782	1h 00m Chicago	MDW 21:35 → PDX 23:35WN 2852	6h 30m	39%	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

ORD · 1h 06m · leaves 10:33 4%

DEN · 1h 10m · leaves 05:30 5%

ATL · 1h 20m · leaves 05:17 6%

Afternoon and evening

ORD · 58m · leaves 18:20 35%

DFW · 1h 08m · leaves 19:51 46%

MDW · 1h 00m · leaves 20:25 61%

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