United Flight 3640 Deals & Information (2026/2027)

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United Flight 3640 Route Deals From $124

The cheapest prices found with in the last 7 days for return flights were $237 and $124 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Sep 17 - Mon, Sep 21
RIC
Richmond Intl.
ORD
O'Hare Intl.
$237 Roundtrip, found 1 day ago
$237
Roundtrip
found 1 day ago
Select United flight, departing Thu, Sep 17 from Richmond Intl. to O'Hare Intl., returning Mon, Sep 21, priced at $237 found 1 day ago
Thu, Sep 17 - Mon, Sep 21
RIC
Richmond Intl.
ORD
O'Hare Intl.
$241 Roundtrip, found 1 day ago
$241
Roundtrip
found 1 day ago
Select United flight, departing Thu, Sep 17 from Richmond Intl. to O'Hare Intl., returning Mon, Sep 21, priced at $241 found 1 day ago
Wed, Sep 23 - Fri, Sep 25
RIC
Richmond Intl.
ORD
O'Hare Intl.
$264 Roundtrip, found 2 days ago
$264
Roundtrip
found 2 days ago
Select United flight, departing Wed, Sep 23 from Richmond Intl. to O'Hare Intl., returning Fri, Sep 25, priced at $264 found 2 days ago
Mon, Oct 19 - Fri, Oct 23
RIC
Richmond Intl.
ORD
O'Hare Intl.
$266 Roundtrip, found 4 days ago
$266
Roundtrip
found 4 days ago
Select United flight, departing Mon, Oct 19 from Richmond Intl. to O'Hare Intl., returning Fri, Oct 23, priced at $266 found 4 days ago
Wed, Sep 16 - Thu, Sep 17
RIC
Richmond Intl.
ORD
O'Hare Intl.
$268 Roundtrip, found 2 days ago
$268
Roundtrip
found 2 days ago
Select United flight, departing Wed, Sep 16 from Richmond Intl. to O'Hare Intl., returning Thu, Sep 17, priced at $268 found 2 days ago
Wed, Sep 23 - Fri, Sep 25
RIC
Richmond Intl.
ORD
O'Hare Intl.
$268 Roundtrip, found 2 days ago
$268
Roundtrip
found 2 days ago
Select United flight, departing Wed, Sep 23 from Richmond Intl. to O'Hare Intl., returning Fri, Sep 25, priced at $268 found 2 days ago
Thu, Oct 22 - Sat, Oct 24
RIC
Richmond Intl.
ORD
O'Hare Intl.
$273 Roundtrip, found 5 days ago
$273
Roundtrip
found 5 days ago
Select United flight, departing Thu, Oct 22 from Richmond Intl. to O'Hare Intl., returning Sat, Oct 24, priced at $273 found 5 days ago
Mon, Oct 19 - Fri, Oct 23
RIC
Richmond Intl.
ORD
O'Hare Intl.
$275 Roundtrip, found 4 days ago
$275
Roundtrip
found 4 days ago
Select United flight, departing Mon, Oct 19 from Richmond Intl. to O'Hare Intl., returning Fri, Oct 23, priced at $275 found 4 days ago
Wed, Sep 16 - Thu, Sep 17
RIC
Richmond Intl.
ORD
O'Hare Intl.
$281 Roundtrip, found 2 days ago
$281
Roundtrip
found 2 days ago
Select United flight, departing Wed, Sep 16 from Richmond Intl. to O'Hare Intl., returning Thu, Sep 17, priced at $281 found 2 days ago
Thu, Oct 22 - Sat, Oct 24
RIC
Richmond Intl.
ORD
O'Hare Intl.
$284 Roundtrip, found 5 days ago
$284
Roundtrip
found 5 days ago
Select United flight, departing Thu, Oct 22 from Richmond Intl. to O'Hare Intl., returning Sat, Oct 24, priced at $284 found 5 days 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.