United Flight AC8123 Deals & Information (2025/2026)

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United Flight 8123 Route Deals From $159

The cheapest prices found with in the last 7 days for return flights were $359 and $159 for one-way flights to Pierre Elliott Trudeau Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Aug 7 - Sun, Aug 10
BOS
Logan Intl.
YUL
Pierre Elliott Trudeau Intl.
$359 Roundtrip, found 4 days ago
$359
Roundtrip
found 4 days ago
Select United flight, departing Thu, Aug 7 from Logan Intl. to Pierre Elliott Trudeau Intl., returning Sun, Aug 10, priced at $359 found 4 days ago
Sun, Jul 20 - Fri, Jul 25
BOS
Logan Intl.
YUL
Pierre Elliott Trudeau Intl.
$378 Roundtrip, found 1 day ago
$378
Roundtrip
found 1 day ago
Select United flight, departing Sun, Jul 20 from Logan Intl. to Pierre Elliott Trudeau Intl., returning Fri, Jul 25, priced at $378 found 1 day ago
Thu, Oct 2 - Thu, Oct 9
BOS
Logan Intl.
YUL
Pierre Elliott Trudeau Intl.
$392 Roundtrip, found 3 days ago
$392
Roundtrip
found 3 days ago
Select United flight, departing Thu, Oct 2 from Logan Intl. to Pierre Elliott Trudeau Intl., returning Thu, Oct 9, priced at $392 found 3 days ago