
United Flight DL3640 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 $189 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.
$189 Roundtrip, found 2 hours ago
$189
Roundtrip
found 2 hours ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$191 Roundtrip, found 2 hours ago
$191
Roundtrip
found 2 hours ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$198 Roundtrip, found 19 hours ago
$198
Roundtrip
found 19 hours ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$208 Roundtrip, found 2 hours ago
$208
Roundtrip
found 2 hours ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$211 Roundtrip, found 7 hours ago
$211
Roundtrip
found 7 hours ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$213 Roundtrip, found 2 hours ago
$213
Roundtrip
found 2 hours ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$214 Roundtrip, found 2 hours ago
$214
Roundtrip
found 2 hours ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$216 Roundtrip, found 3 days ago
$216
Roundtrip
found 3 days ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$219 Roundtrip, found 2 hours ago
$219
Roundtrip
found 2 hours ago
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$221 Roundtrip, found 2 hours ago
$221
Roundtrip
found 2 hours ago