
United Flight AC3640 Deals & Information (2025/2026)
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United Flight 3640 Route Deals From $103
The cheapest prices found with in the last 7 days for return flights were $188 and $103 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$188 Roundtrip, found 5 days ago
$188
Roundtrip
found 5 days ago
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$194 Roundtrip, found 1 day ago
$194
Roundtrip
found 1 day ago
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$203 Roundtrip, found 1 day ago
$203
Roundtrip
found 1 day ago
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$218 Roundtrip, found 1 day ago
$218
Roundtrip
found 1 day ago
YYZ
Pearson Intl.
ORD
O'Hare Intl.
$235 Roundtrip, found 1 day ago
$235
Roundtrip
found 1 day ago