United Flight AC3640 Deals & Information (2025/2026)

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United Flight 3640 Route Deals From $133

The cheapest prices found with in the last 7 days for return flights were $163 and $133 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Oct 9 - Sat, Oct 11
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$163 Roundtrip, found 1 day ago
$163
Roundtrip
found 1 day ago
Select United flight, departing Thu, Oct 9 from Pearson Intl. to O'Hare Intl., returning Sat, Oct 11, priced at $163 found 1 day ago
Sun, Oct 5 - Wed, Oct 8
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$192 Roundtrip, found 2 hours ago
$192
Roundtrip
found 2 hours ago
Select United flight, departing Sun, Oct 5 from Pearson Intl. to O'Hare Intl., returning Wed, Oct 8, priced at $192 found 2 hours ago
Mon, Oct 6 - Thu, Oct 9
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$205 Roundtrip, found 1 day ago
$205
Roundtrip
found 1 day ago
Select United flight, departing Mon, Oct 6 from Pearson Intl. to O'Hare Intl., returning Thu, Oct 9, priced at $205 found 1 day ago
Mon, Oct 6 - Thu, Oct 9
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$209 Roundtrip, found 1 day ago
$209
Roundtrip
found 1 day ago
Select United flight, departing Mon, Oct 6 from Pearson Intl. to O'Hare Intl., returning Thu, Oct 9, priced at $209 found 1 day ago
Sun, Feb 8 - Sat, Feb 14
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$213 Roundtrip, found 6 days ago
$213
Roundtrip
found 6 days ago
Select United flight, departing Sun, Feb 8 from Pearson Intl. to O'Hare Intl., returning Sat, Feb 14, priced at $213 found 6 days ago
Sun, Feb 8 - Sat, Feb 14
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$223 Roundtrip, found 6 days ago
$223
Roundtrip
found 6 days ago
Select United flight, departing Sun, Feb 8 from Pearson Intl. to O'Hare Intl., returning Sat, Feb 14, priced at $223 found 6 days ago
Sun, Oct 5 - Wed, Oct 8
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$231 Roundtrip, found 2 hours ago
$231
Roundtrip
found 2 hours ago
Select United flight, departing Sun, Oct 5 from Pearson Intl. to O'Hare Intl., returning Wed, Oct 8, priced at $231 found 2 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.