United Flight AC3640 Deals & Information (2025/2026)

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United Flight 3640 Route Deals From $134

The cheapest prices found with in the last 7 days for return flights were $164 and $134 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Sep 19 - Sun, Sep 21
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$164 Roundtrip, found 1 day ago
$164
Roundtrip
found 1 day ago
Select United flight, departing Fri, Sep 19 from Pearson Intl. to O'Hare Intl., returning Sun, Sep 21, priced at $164 found 1 day ago
Fri, Aug 15 - Sun, Aug 17
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$204 Roundtrip, found 2 hours ago
$204
Roundtrip
found 2 hours ago
Select United flight, departing Fri, Aug 15 from Pearson Intl. to O'Hare Intl., returning Sun, Aug 17, priced at $204 found 2 hours ago
Fri, Aug 15 - Sun, Aug 17
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$215 Roundtrip, found 2 hours ago
$215
Roundtrip
found 2 hours ago
Select United flight, departing Fri, Aug 15 from Pearson Intl. to O'Hare Intl., returning Sun, Aug 17, priced at $215 found 2 hours ago
Fri, Sep 19 - Sun, Sep 21
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$220 Roundtrip, found 1 day ago
$220
Roundtrip
found 1 day ago
Select United flight, departing Fri, Sep 19 from Pearson Intl. to O'Hare Intl., returning Sun, Sep 21, priced at $220 found 1 day ago
Sat, Jul 26 - Mon, Jul 28
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$221 Roundtrip, found 5 hours ago
$221
Roundtrip
found 5 hours ago
Select United flight, departing Sat, Jul 26 from Pearson Intl. to O'Hare Intl., returning Mon, Jul 28, priced at $221 found 5 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.