October is by far the best month, wherein you can get cheapest flights for Detroit to Seattle. Meanwhile, September is perceived as the expensive month due to the varying factors. That’s why it’s highly advised to make advanced online flight booking to save huge amounts of money.
May- During this month the footfall is less so, the flight is gradually inexpensive.
May - is the cheapest month to book round trip flights.
Cheapest Fare- Currently, this is the fare price based on the current demand.
Disclaimer - All the mentioned fares were found within last 48 hrs. The displayed fares are based on historical data and are subject to change. The fares cannot be guaranteed at the time of booking.

Detroit
16:46
Detroit Metropolitan Wayne County Airport [DTW]
Fri , 09 Oct 2026

Seattle
18:47
Seattle Tacoma International Airport [SEA]
Fri, 09 Oct 2026

Detroit
18:00
Detroit Metropolitan Wayne County Airport [DTW]
Fri , 09 Oct 2026

Seattle
22:29
Seattle Tacoma International Airport [SEA]
Fri, 09 Oct 2026

Detroit
20:30
Detroit Metropolitan Wayne County Airport [DTW]
Fri , 09 Oct 2026

Seattle
00:20
Seattle Tacoma International Airport [SEA]
Sat, 10 Oct 2026

Detroit
05:45
Detroit Metropolitan Wayne County Airport [DTW]
Fri , 09 Oct 2026

Seattle
10:00
Seattle Tacoma International Airport [SEA]
Fri, 09 Oct 2026

Detroit
07:30
Detroit Metropolitan Wayne County Airport [DTW]
Fri , 13 Nov 2026

Seattle
11:40
Seattle Tacoma International Airport [SEA]
Fri, 13 Nov 2026

Detroit
05:33
Detroit Metropolitan Wayne County Airport [DTW]
Fri , 13 Nov 2026

Seattle
10:25
Seattle Tacoma International Airport [SEA]
Fri, 13 Nov 2026

Detroit
16:46
Detroit Metropolitan Wayne County Airport [DTW]
Fri , 13 Nov 2026

Seattle
18:47
Seattle Tacoma International Airport [SEA]
Fri, 13 Nov 2026











To crack the better offer on Detroit to Seattle flights, it’s better to make advanced bookings at least few weeks prior of your intended date because price might rise eventually due to the delay.