United Flight AC8458 Deals & Information (2025/2026)

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United Flight 8458 Route Deals From $132

The cheapest prices found with in the last 7 days for return flights were $316 and $132 for one-way flights to Pierre Elliott Trudeau Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Nov 11 - Thu, Nov 13
ORD
O'Hare Intl.
YUL
Pierre Elliott Trudeau Intl.
$316 Roundtrip, just found
$316
Roundtrip
just found
Select United flight, departing Tue, Nov 11 from O'Hare Intl. to Pierre Elliott Trudeau Intl., returning Thu, Nov 13, priced at $316 just found
Tue, Nov 11 - Thu, Nov 13
ORD
O'Hare Intl.
YUL
Pierre Elliott Trudeau Intl.
$319 Roundtrip, just found
$319
Roundtrip
just found
Select United flight, departing Tue, Nov 11 from O'Hare Intl. to Pierre Elliott Trudeau Intl., returning Thu, Nov 13, priced at $319 just found
Wed, Feb 25 - Sun, Mar 1
ORD
O'Hare Intl.
YUL
Pierre Elliott Trudeau Intl.
$343 Roundtrip, found 22 hours ago
$343
Roundtrip
found 22 hours ago
Select United flight, departing Wed, Feb 25 from O'Hare Intl. to Pierre Elliott Trudeau Intl., returning Sun, Mar 1, priced at $343 found 22 hours ago