United Flight 3640 Deals & Information (2025/2026)

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United Flight 3640 Route Deals From $128

The cheapest prices found with in the last 7 days for return flights were $209 and $128 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Aug 23 - Sun, Aug 24
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$209 Roundtrip, found 3 days ago
$209
Roundtrip
found 3 days ago
Select United flight, departing Sat, Aug 23 from Pearson Intl. to O'Hare Intl., returning Sun, Aug 24, priced at $209 found 3 days ago
Sat, Oct 11 - Sat, Oct 18
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$210 Roundtrip, found 3 days ago
$210
Roundtrip
found 3 days ago
Select United flight, departing Sat, Oct 11 from Pearson Intl. to O'Hare Intl., returning Sat, Oct 18, priced at $210 found 3 days ago
Sun, Feb 8 - Sat, Feb 14
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$213 Roundtrip, found 2 days ago
$213
Roundtrip
found 2 days ago
Select United flight, departing Sun, Feb 8 from Pearson Intl. to O'Hare Intl., returning Sat, Feb 14, priced at $213 found 2 days ago
Sat, Aug 23 - Sun, Aug 24
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$221 Roundtrip, found 3 days ago
$221
Roundtrip
found 3 days ago
Select United flight, departing Sat, Aug 23 from Pearson Intl. to O'Hare Intl., returning Sun, Aug 24, priced at $221 found 3 days ago
Sun, Feb 8 - Sat, Feb 14
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$223 Roundtrip, found 2 days ago
$223
Roundtrip
found 2 days ago
Select United flight, departing Sun, Feb 8 from Pearson Intl. to O'Hare Intl., returning Sat, Feb 14, priced at $223 found 2 days ago
Sat, Oct 11 - Sat, Oct 18
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$224 Roundtrip, found 3 days ago
$224
Roundtrip
found 3 days ago
Select United flight, departing Sat, Oct 11 from Pearson Intl. to O'Hare Intl., returning Sat, Oct 18, priced at $224 found 3 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.