United Flight 1643 Deals & Information (2025/2026)

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United Flight 1643 Route Deals From $92

The cheapest prices found with in the last 7 days for return flights were $192 and $92 for one-way flights to Seattle - Tacoma Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Nov 1 - Sat, Nov 8
ORD
O'Hare Intl.
SEA
Seattle - Tacoma Intl.
$192 Roundtrip, found 18 hours ago
$192
Roundtrip
found 18 hours ago
Select United flight, departing Sat, Nov 1 from O'Hare Intl. to Seattle - Tacoma Intl., returning Sat, Nov 8, priced at $192 found 18 hours ago
Sat, Nov 1 - Sat, Nov 8
ORD
O'Hare Intl.
SEA
Seattle - Tacoma Intl.
$195 Roundtrip, found 18 hours ago
$195
Roundtrip
found 18 hours ago
Select United flight, departing Sat, Nov 1 from O'Hare Intl. to Seattle - Tacoma Intl., returning Sat, Nov 8, priced at $195 found 18 hours ago
Tue, Sep 30 - Sat, Oct 4
ORD
O'Hare Intl.
SEA
Seattle - Tacoma Intl.
$197 Roundtrip, found 3 days ago
$197
Roundtrip
found 3 days ago
Select United flight, departing Tue, Sep 30 from O'Hare Intl. to Seattle - Tacoma Intl., returning Sat, Oct 4, priced at $197 found 3 days ago
Tue, Nov 4 - Tue, Nov 11
ORD
O'Hare Intl.
SEA
Seattle - Tacoma Intl.
$201 Roundtrip, found 2 days ago
$201
Roundtrip
found 2 days ago
Select United flight, departing Tue, Nov 4 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Nov 11, priced at $201 found 2 days ago