FFL Helper
Detroit DTT
$135
BOS → DTW · Frontier Airlines
FFL Helper / Boston / Detroit / September 2026
BOS → DTT · 2026-09
Boston to Detroit in September 2026
Dated one-way fares from Boston to Detroit in September 2026. Use the calendar to see which days are cheaper.
Lowest this month
$137
Highest this month
$137
Sample fare
$135
Airports
BOS–DTW
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Other months: August 2026 · September 2026 · Full route
September 2026 price calendar
September 2026
From $137
Mon
Tue
Wed
Thu
Fri
Sat
Sun
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11
$137
12
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Dated fares
Booking BOS to DTT in September 2026
This page is only September 2026 on the Boston to Detroit route. Open the full route if you want the next months side by side.
Prices move as seats sell. Confirm the live itinerary before you book Boston to Detroit in September 2026.