
United Flight 3640 Deals & Information (2025/2026)
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United Flight 3640 Route Deals From $92
The cheapest prices found with in the last 7 days for return flights were $186 and $92 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.
$186 Roundtrip, found 2 days ago
$186
Roundtrip
found 2 days ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$188 Roundtrip, found 2 days ago
$188
Roundtrip
found 2 days ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$192 Roundtrip, found 3 days ago
$192
Roundtrip
found 3 days ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$192 Roundtrip, found 2 hours ago
$192
Roundtrip
found 2 hours ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$194 Roundtrip, found 19 hours ago
$194
Roundtrip
found 19 hours ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$198 Roundtrip, found 2 days ago
$198
Roundtrip
found 2 days ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$203 Roundtrip, found 4 days ago
$203
Roundtrip
found 4 days ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$211 Roundtrip, found 5 days ago
$211
Roundtrip
found 5 days ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$253 Roundtrip, found 2 hours ago
$253
Roundtrip
found 2 hours ago