United Flight DL3640 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 $189 and $91 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Feb 2 - Mon, Feb 9
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$189 Roundtrip, found 1 day ago
$189
Roundtrip
found 1 day ago
Select United flight, departing Mon, Feb 2 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Mon, Feb 9, priced at $189 found 1 day ago
Mon, Nov 3 - Thu, Nov 13
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$191 Roundtrip, found 4 days ago
$191
Roundtrip
found 4 days ago
Select United flight, departing Mon, Nov 3 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Thu, Nov 13, priced at $191 found 4 days ago
Sat, Nov 8 - Mon, Nov 10
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$192 Roundtrip, found 4 days ago
$192
Roundtrip
found 4 days ago
Select United flight, departing Sat, Nov 8 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Mon, Nov 10, priced at $192 found 4 days ago
Sat, Mar 28 - Thu, Apr 2
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$194 Roundtrip, found 8 hours ago
$194
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Mar 28 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Thu, Apr 2, priced at $194 found 8 hours ago
Sat, Mar 28 - Thu, Apr 2
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$199 Roundtrip, found 8 hours ago
$199
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Mar 28 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Thu, Apr 2, priced at $199 found 8 hours ago
Sat, Oct 11 - Sun, Oct 12
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$202 Roundtrip, found 11 hours ago
$202
Roundtrip
found 11 hours ago
Select United flight, departing Sat, Oct 11 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Sun, Oct 12, priced at $202 found 11 hours ago
Mon, Nov 3 - Thu, Nov 13
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$211 Roundtrip, found 4 days ago
$211
Roundtrip
found 4 days ago
Select United flight, departing Mon, Nov 3 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Thu, Nov 13, priced at $211 found 4 days ago
Sat, Mar 28 - Thu, Apr 2
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$213 Roundtrip, found 8 hours ago
$213
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Mar 28 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Thu, Apr 2, priced at $213 found 8 hours ago
Sat, Mar 28 - Thu, Apr 2
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$219 Roundtrip, found 8 hours ago
$219
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Mar 28 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Thu, Apr 2, priced at $219 found 8 hours ago
Fri, Oct 24 - Sun, Oct 26
DTW
Detroit Metropolitan Wayne County
IAD
Washington Dulles Intl.
$223 Roundtrip, found 6 hours ago
$223
Roundtrip
found 6 hours ago
Select United flight, departing Fri, Oct 24 from Detroit Metropolitan Wayne County to Washington Dulles Intl., returning Sun, Oct 26, priced at $223 found 6 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.