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 14% of the time at 10 am and 42% of the time at 6 pm.

Nonstops


Alaska	DTW	SEA	5h 01m	76%	0.2%	544	Flying now
Delta	DTW	SEA	4h 59m	74%	0.9%	1,520	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Seattle on time. Total trip = scheduled departure to arrival, layover included (Seattle is 3 h behind Detroit). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	DTW 17:40 → SLC 19:38DL 765	3h 07m Salt Lake City	SLC 22:45 → SEA 23:59DL 2998	9h 19m	98%	90%
Delta Details →	DTW 08:45 → PHX 09:56DL 1070	2h 09m Phoenix	PHX 12:05 → SEA 15:18DL 2419	9h 33m	97%	90%
Delta Details →	DTW 07:00 → SLC 08:54DL 3229	2h 41m Salt Lake City	SLC 11:35 → SEA 12:52DL 2995	8h 52m	100%	88%
Delta Details →	DTW 08:59 → LAS 10:14DL 334	3h 21m Las Vegas	LAS 13:35 → SEA 16:23DL 2905	10h 24m	98%	86%
Delta Details →	DTW 07:01 → MSP 07:55DL 1746	3h 15m Minneapolis	MSP 11:10 → SEA 12:58DL 889	8h 57m	99%	85%
Delta Details →	DTW 05:17 → ATL 07:10DL 2375	4h 00m Atlanta	ATL 11:10 → SEA 13:38DL 648	11h 21m	99%	85%
United Details →	DTW 06:00 → IAD 07:34UA 4058 · flown by Mesa	1h 26m Dulles	IAD 09:00 → SEA 11:51UA 2101	8h 51m	92%	84%
Delta Details →	DTW 08:54 → PDX 10:41DL 2171	1h 42m Portland	PDX 12:23 → SEA 13:34DL 3802 · flown by SkyWest	7h 40m	97%	84%
Tight connection: often missed
United Details →	DTW 17:29 → SFO 19:40UA 1863	1h 14m San Francisco	SFO 20:54 → SEA 23:19UA 1007	8h 50m	67%	43%
American Details →	DTW 11:51 → DFW 13:45AA 1792	48m Dallas-Fort Worth	DFW 14:33 → SEA 16:47AA 727	7h 56m	69%	38%
American Details →	DTW 19:51 → DFW 21:44AA 1786	57m Dallas-Fort Worth	DFW 22:41 → SEA 00:57 +1AA 1487	8h 06m	46%	19%

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

DEN · 1h 10m · leaves 05:30 5%

IAD · 1h 20m · leaves 10:13 6%

SLC · 1h 12m · leaves 08:25 7%

Afternoon and evening

SFO · 1h 14m · leaves 17:29 33%

SAN · 49m · leaves 16:35 42%

DFW · 57m · leaves 19:51 54%

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.


Delta DL 883 DTW 15:50 → LAX Alaska AS 495 LAX 21:12 → SEA Connection details →	3h 33m	11h 09m	99%	90%
Delta DL 3229 DTW 07:00 → SLC Alaska AS 664 SLC 12:51 → SEA Connection details →	3h 57m	10h 04m	100%	88%
Frontier F9 2801 DTW 08:30 → LAS Delta DL 2905 LAS 13:35 → SEA Connection details →	3h 38m	10h 53m	99%	88%

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