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.

Thu, Oct 30 - Mon, Nov 3
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$189 Roundtrip, found 2 hours ago
$189
Roundtrip
found 2 hours ago
Select United flight, departing Thu, Oct 30 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Mon, Nov 3, priced at $189 found 2 hours ago
Thu, Nov 13 - Tue, Nov 18
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$191 Roundtrip, found 2 hours ago
$191
Roundtrip
found 2 hours ago
Select United flight, departing Thu, Nov 13 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Tue, Nov 18, priced at $191 found 2 hours ago
Sat, Mar 28 - Thu, Apr 2
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$198 Roundtrip, found 19 hours ago
$198
Roundtrip
found 19 hours ago
Select United flight, departing Sat, Mar 28 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Thu, Apr 2, priced at $198 found 19 hours ago
Sat, Nov 1 - Thu, Nov 6
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$208 Roundtrip, found 2 hours ago
$208
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Nov 1 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Thu, Nov 6, priced at $208 found 2 hours ago
Fri, Nov 14 - Sat, Nov 15
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$211 Roundtrip, found 7 hours ago
$211
Roundtrip
found 7 hours ago
Select United flight, departing Fri, Nov 14 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Sat, Nov 15, priced at $211 found 7 hours ago
Sat, Nov 1 - Thu, Nov 6
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$213 Roundtrip, found 2 hours ago
$213
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Nov 1 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Thu, Nov 6, priced at $213 found 2 hours ago
Mon, Nov 17 - Wed, Nov 19
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$214 Roundtrip, found 2 hours ago
$214
Roundtrip
found 2 hours ago
Select United flight, departing Mon, Nov 17 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Wed, Nov 19, priced at $214 found 2 hours ago
Thu, Oct 23 - Sat, Oct 25
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$216 Roundtrip, found 3 days ago
$216
Roundtrip
found 3 days ago
Select United flight, departing Thu, Oct 23 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Sat, Oct 25, priced at $216 found 3 days ago
Sat, Nov 1 - Thu, Nov 6
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$219 Roundtrip, found 2 hours ago
$219
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Nov 1 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Thu, Nov 6, priced at $219 found 2 hours ago
Thu, Nov 13 - Tue, Nov 18
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$221 Roundtrip, found 2 hours ago
$221
Roundtrip
found 2 hours ago
Select United flight, departing Thu, Nov 13 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Tue, Nov 18, priced at $221 found 2 hours ago

Frequently asked questions

What route does flight number UA3640 take?
UA3640 travels between O'Hare Intl. Airport (ORD) and Bangor International Airport directly. This trip usually takes 2 hours and 26 minutes.
What terminal does UA3640 fly out of?
UA3640 runs between O'Hare Airport and Bangor International Airport, and passengers traveling on this flight usually jet off from Terminal 2.
What kind of plane is on flight number UA3640?
Get ready to hop on board an Embraer 175 if you've reserved a seat on flight UA3640. Most services from O'Hare Intl. Airport (ORD) to Bangor, ME Airport (BGR-Bangor Intl.) are operated using this kind of plane.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your UA3640 flight with Travelocity, please visit our Customer Service Portal.