United Flight AC3557 Deals & Information (2025/2026)

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United Flight 3557 Route Deals From $103

The cheapest prices found with in the last 7 days for return flights were $231 and $103 for one-way flights to Pearson Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Oct 11 - Mon, Oct 13
EWR
Newark Liberty Intl. Airport
YYZ
Pearson Intl.
$231 Roundtrip, found 7 hours ago
$231
Roundtrip
found 7 hours ago
Select United flight, departing Sat, Oct 11 from Newark Liberty Intl. Airport to Pearson Intl., returning Mon, Oct 13, priced at $231 found 7 hours ago
Sat, Oct 11 - Mon, Oct 13
EWR
Newark Liberty Intl. Airport
YYZ
Pearson Intl.
$241 Roundtrip, found 7 hours ago
$241
Roundtrip
found 7 hours ago
Select United flight, departing Sat, Oct 11 from Newark Liberty Intl. Airport to Pearson Intl., returning Mon, Oct 13, priced at $241 found 7 hours ago
Thu, Oct 9 - Tue, Oct 14
EWR
Newark Liberty Intl. Airport
YYZ
Pearson Intl.
$256 Roundtrip, found 5 hours ago
$256
Roundtrip
found 5 hours ago
Select United flight, departing Thu, Oct 9 from Newark Liberty Intl. Airport to Pearson Intl., returning Tue, Oct 14, priced at $256 found 5 hours ago
Sat, Oct 11 - Mon, Oct 13
EWR
Newark Liberty Intl. Airport
YYZ
Pearson Intl.
$280 Roundtrip, found 7 hours ago
$280
Roundtrip
found 7 hours ago
Select United flight, departing Sat, Oct 11 from Newark Liberty Intl. Airport to Pearson Intl., returning Mon, Oct 13, priced at $280 found 7 hours ago
Sun, Oct 19 - Wed, Oct 22
EWR
Newark Liberty Intl. Airport
YYZ
Pearson Intl.
$282 Roundtrip, found 1 day ago
$282
Roundtrip
found 1 day ago
Select United flight, departing Sun, Oct 19 from Newark Liberty Intl. Airport to Pearson Intl., returning Wed, Oct 22, priced at $282 found 1 day ago
Thu, Sep 25 - Sun, Sep 28
EWR
Newark Liberty Intl. Airport
YYZ
Pearson Intl.
$287 Roundtrip, found 1 day ago
$287
Roundtrip
found 1 day ago
Select United flight, departing Thu, Sep 25 from Newark Liberty Intl. Airport to Pearson Intl., returning Sun, Sep 28, priced at $287 found 1 day ago
Sat, Oct 11 - Mon, Oct 13
EWR
Newark Liberty Intl. Airport
YYZ
Pearson Intl.
$290 Roundtrip, found 7 hours ago
$290
Roundtrip
found 7 hours ago
Select United flight, departing Sat, Oct 11 from Newark Liberty Intl. Airport to Pearson Intl., returning Mon, Oct 13, priced at $290 found 7 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.