Alaska Airlines
AS343Seattle to Detroit
Alaska Airlines flight AS343 flies from Seattle Tacoma (SEA) to Detroit (DTW), 3,093 km. Over October 2025 to July 2026 it usually arrives about 4 minutes early: 86% of 141 flights arrived within 15 minutes of schedule and 0.7% were cancelled (US Department of Transportation data).
On-time record, last 12 months
86%
on time (within 15 min)
6%
more than 30 min late
0.7%
cancelled
-4 min
average arrival vs schedule
Every operation of AS343, October 2025 to July 2026: 141 flights. Source: US Bureau of Transportation Statistics, public domain.
Routes flown as AS343
- Seattle Tacoma (SEA) to Detroit (DTW)51 flights
- Boise (BOI) to Portland (PDX)43 flights
- Tampa (TPA) to Seattle Tacoma (SEA)28 flights
- Portland (PDX) to Boise (BOI)11 flights
- Anchorage (ANC) to Kona (KOA)5 flights
- Seattle Tacoma (SEA) to Atlanta (ATL)1 flights
- Albuquerque (ABQ) to Seattle Tacoma (SEA)1 flights
- Portland (PDX) to Denver (DEN)1 flights
Other flights from Seattle to Detroit
More about Seattle Tacoma (SEA) and Detroit (DTW).
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