Alaska Airlines Flight 642 Deals & Information (2025/2026)

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Alaska Airlines Flight 642 Route Deals From

The cheapest prices found with in the last 7 days for return flights were $165 and for one-way flights to Denver Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Oct 22 - Sat, Oct 25
SEA
Seattle - Tacoma Intl.
DEN
Denver Intl.
$165 Roundtrip, just found
$165
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Oct 22 from Seattle - Tacoma Intl. to Denver Intl., returning Sat, Oct 25, priced at $165 just found
Tue, Aug 12 - Tue, Aug 19
SEA
Seattle - Tacoma Intl.
DEN
Denver Intl.
$167 Roundtrip, found 1 day ago
$167
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Aug 12 from Seattle - Tacoma Intl. to Denver Intl., returning Tue, Aug 19, priced at $167 found 1 day ago
Thu, Sep 25 - Sun, Sep 28
SEA
Seattle - Tacoma Intl.
DEN
Denver Intl.
$173 Roundtrip, found 21 hours ago
$173
Roundtrip
found 21 hours ago
Select Alaska Airlines flight, departing Thu, Sep 25 from Seattle - Tacoma Intl. to Denver Intl., returning Sun, Sep 28, priced at $173 found 21 hours ago
Tue, Sep 9 - Wed, Sep 10
PAE
Seattle Paine Field Intl. Airport
DEN
Denver Intl.
$333 Roundtrip, found 6 days ago
$333
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Tue, Sep 9 from Seattle Paine Field Intl. Airport to Denver Intl., returning Wed, Sep 10, priced at $333 found 6 days ago