United Flight 4165 Deals & Information (2025/2026)

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United Flight 4165 Route Deals From $143

The cheapest prices found with in the last 7 days for return flights were $217 and $143 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Jul 28 - Wed, Jul 30
BUF
Buffalo Niagara Intl.
ORD
O'Hare Intl.
$217 Roundtrip, found 1 day ago
$217
Roundtrip
found 1 day ago
Select United flight, departing Mon, Jul 28 from Buffalo Niagara Intl. to O'Hare Intl., returning Wed, Jul 30, priced at $217 found 1 day ago
Wed, Jul 2 - Sat, Jul 5
BUF
Buffalo Niagara Intl.
ORD
O'Hare Intl.
$218 Roundtrip, found 5 days ago
$218
Roundtrip
found 5 days ago
Select United flight, departing Wed, Jul 2 from Buffalo Niagara Intl. to O'Hare Intl., returning Sat, Jul 5, priced at $218 found 5 days ago