United Flight 3640 Deals & Information (2026/2027)

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United Flight 3640 Route Deals From $136

The cheapest prices found with in the last 7 days for return flights were $311 and $136 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Jan 22 - Sat, Jan 23
RIC
Richmond Intl.
ORD
O'Hare Intl.
$311 Roundtrip, found 1 hour ago
$311
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Jan 22 from Richmond Intl. to O'Hare Intl., returning Sat, Jan 23, priced at $311 found 1 hour ago
Fri, Jan 22 - Sat, Jan 23
RIC
Richmond Intl.
ORD
O'Hare Intl.
$322 Roundtrip, found 1 hour ago
$322
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Jan 22 from Richmond Intl. to O'Hare Intl., returning Sat, Jan 23, priced at $322 found 1 hour ago
Mon, Nov 23 - Fri, Nov 27
RIC
Richmond Intl.
ORD
O'Hare Intl.
$334 Roundtrip, found 6 days ago
$334
Roundtrip
found 6 days ago
Select United flight, departing Mon, Nov 23 from Richmond Intl. to O'Hare Intl., returning Fri, Nov 27, priced at $334 found 6 days ago
Thu, Dec 3 - Sun, Dec 6
RIC
Richmond Intl.
ORD
O'Hare Intl.
$337 Roundtrip, found 5 hours ago
$337
Roundtrip
found 5 hours ago
Select United flight, departing Thu, Dec 3 from Richmond Intl. to O'Hare Intl., returning Sun, Dec 6, priced at $337 found 5 hours ago
Fri, Jan 22 - Sat, Jan 23
RIC
Richmond Intl.
ORD
O'Hare Intl.
$358 Roundtrip, found 1 hour ago
$358
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Jan 22 from Richmond Intl. to O'Hare Intl., returning Sat, Jan 23, priced at $358 found 1 hour ago
Fri, Jan 22 - Sat, Jan 23
RIC
Richmond Intl.
ORD
O'Hare Intl.
$368 Roundtrip, found 1 hour ago
$368
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Jan 22 from Richmond Intl. to O'Hare Intl., returning Sat, Jan 23, priced at $368 found 1 hour ago
Fri, Jan 22 - Sat, Jan 23
RIC
Richmond Intl.
ORD
O'Hare Intl.
$369 Roundtrip, found 1 hour ago
$369
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Jan 22 from Richmond Intl. to O'Hare Intl., returning Sat, Jan 23, priced at $369 found 1 hour 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.