
United Flight 3640 Deals & Information (2025/2026)
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United Flight 3640 Route Deals From $91
The cheapest prices found with in the last 7 days for return flights were $191 and $91 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$191 Roundtrip, found 1 day ago
$191
Roundtrip
found 1 day ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$192 Roundtrip, found 1 day ago
$192
Roundtrip
found 1 day ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$198 Roundtrip, found 1 day ago
$198
Roundtrip
found 1 day ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$204 Roundtrip, found 1 day ago
$204
Roundtrip
found 1 day ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$208 Roundtrip, found 2 days ago
$208
Roundtrip
found 2 days ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$210 Roundtrip, found 1 day ago
$210
Roundtrip
found 1 day ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$211 Roundtrip, found 1 day ago
$211
Roundtrip
found 1 day ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$213 Roundtrip, found 2 days ago
$213
Roundtrip
found 2 days ago