United Flight 3640 Deals & Information (2026/2027)

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United Flight 3640 Route Deals From $150

The cheapest prices found with in the last 7 days for return flights were $282 and $150 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Oct 12 - Tue, Oct 13
RIC
Richmond Intl.
ORD
O'Hare Intl.
$282 Roundtrip, found 6 days ago
$282
Roundtrip
found 6 days ago
Select United flight, departing Mon, Oct 12 from Richmond Intl. to O'Hare Intl., returning Tue, Oct 13, priced at $282 found 6 days ago
Thu, Nov 26 - Tue, Dec 1
RIC
Richmond Intl.
ORD
O'Hare Intl.
$287 Roundtrip, found 4 days ago
$287
Roundtrip
found 4 days ago
Select United flight, departing Thu, Nov 26 from Richmond Intl. to O'Hare Intl., returning Tue, Dec 1, priced at $287 found 4 days ago
Thu, Oct 8 - Sat, Oct 10
RIC
Richmond Intl.
ORD
O'Hare Intl.
$291 Roundtrip, found 5 days ago
$291
Roundtrip
found 5 days ago
Select United flight, departing Thu, Oct 8 from Richmond Intl. to O'Hare Intl., returning Sat, Oct 10, priced at $291 found 5 days ago
Thu, Nov 26 - Tue, Dec 1
RIC
Richmond Intl.
ORD
O'Hare Intl.
$297 Roundtrip, found 4 days ago
$297
Roundtrip
found 4 days ago
Select United flight, departing Thu, Nov 26 from Richmond Intl. to O'Hare Intl., returning Tue, Dec 1, priced at $297 found 4 days ago
Thu, Nov 26 - Tue, Dec 1
RIC
Richmond Intl.
ORD
O'Hare Intl.
$310 Roundtrip, found 4 days ago
$310
Roundtrip
found 4 days ago
Select United flight, departing Thu, Nov 26 from Richmond Intl. to O'Hare Intl., returning Tue, Dec 1, priced at $310 found 4 days ago
Wed, Oct 28 - Sat, Oct 31
RIC
Richmond Intl.
ORD
O'Hare Intl.
$320 Roundtrip, found 12 hours ago
$320
Roundtrip
found 12 hours ago
Select United flight, departing Wed, Oct 28 from Richmond Intl. to O'Hare Intl., returning Sat, Oct 31, priced at $320 found 12 hours ago
Thu, Dec 3 - Sat, Dec 5
RIC
Richmond Intl.
ORD
O'Hare Intl.
$321 Roundtrip, found 4 days ago
$321
Roundtrip
found 4 days ago
Select United flight, departing Thu, Dec 3 from Richmond Intl. to O'Hare Intl., returning Sat, Dec 5, priced at $321 found 4 days ago
Sat, Dec 5 - Mon, Dec 7
RIC
Richmond Intl.
ORD
O'Hare Intl.
$325 Roundtrip, found 11 hours ago
$325
Roundtrip
found 11 hours ago
Select United flight, departing Sat, Dec 5 from Richmond Intl. to O'Hare Intl., returning Mon, Dec 7, priced at $325 found 11 hours ago
Wed, Oct 28 - Sat, Oct 31
RIC
Richmond Intl.
ORD
O'Hare Intl.
$330 Roundtrip, found 12 hours ago
$330
Roundtrip
found 12 hours ago
Select United flight, departing Wed, Oct 28 from Richmond Intl. to O'Hare Intl., returning Sat, Oct 31, priced at $330 found 12 hours ago
Wed, Nov 4 - Fri, Nov 6
RIC
Richmond Intl.
ORD
O'Hare Intl.
$331 Roundtrip, found 1 day ago
$331
Roundtrip
found 1 day ago
Select United flight, departing Wed, Nov 4 from Richmond Intl. to O'Hare Intl., returning Fri, Nov 6, priced at $331 found 1 day ago
Fri, Jan 22 - Sat, Jan 23
RIC
Richmond Intl.
ORD
O'Hare Intl.
$332 Roundtrip, found 8 hours ago
$332
Roundtrip
found 8 hours ago
Select United flight, departing Fri, Jan 22 from Richmond Intl. to O'Hare Intl., returning Sat, Jan 23, priced at $332 found 8 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.