United Flight AC3557 Deals & Information (2025/2026)

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United Flight 3557 Route Deals From

The cheapest prices found with in the last 7 days for return flights were $221 and for one-way flights to Pearson Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Aug 22 - Thu, Aug 28
EWR
Newark Liberty Intl. Airport
YYZ
Pearson Intl.
$221 Roundtrip, found 11 hours ago
$221
Roundtrip
found 11 hours ago
Select United flight, departing Fri, Aug 22 from Newark Liberty Intl. Airport to Pearson Intl., returning Thu, Aug 28, priced at $221 found 11 hours ago
Thu, Sep 4 - Fri, Sep 5
EWR
Newark Liberty Intl. Airport
YYZ
Pearson Intl.
$227 Roundtrip, found 4 hours ago
$227
Roundtrip
found 4 hours ago
Select United flight, departing Thu, Sep 4 from Newark Liberty Intl. Airport to Pearson Intl., returning Fri, Sep 5, priced at $227 found 4 hours ago
Thu, Sep 4 - Fri, Sep 5
EWR
Newark Liberty Intl. Airport
YYZ
Pearson Intl.
$237 Roundtrip, found 4 hours ago
$237
Roundtrip
found 4 hours ago
Select United flight, departing Thu, Sep 4 from Newark Liberty Intl. Airport to Pearson Intl., returning Fri, Sep 5, priced at $237 found 4 hours ago

Frequently asked questions

What route does flight number UA3557 take?
UA3557 flies direct from Chicago, IL Airport (ORD-O'Hare Intl.) to Hartsfield--Jackson Atlanta International Airport. During this trip, expect to be in the air for approximately 1 hour and 58 minutes. Book ahead to lock in your preferred seat.
What terminal does UA3557 fly out of?
UA3557 runs between O'Hare Airport and Hartsfield-Jackson Atlanta Intl. Airport (ATL), and those booked on this flight commonly board the plane from Terminal 2.
What kind of plane is on flight number UA3557?
The Embraer 170 is the aircraft most often used for flight UA3557. This flight nearly always sets off from Chicago, IL Airport (ORD-O'Hare Intl.) and lands at Atlanta, GA Airport (ATL-Hartsfield-Jackson Atlanta Intl.).
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 UA3557 flight with Travelocity, please visit our Customer Service Portal.