Alaska Airlines Flight WN642 Deals & Information (2025/2026)

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Alaska Airlines Flight 642 Route Deals From $79

The cheapest prices found with in the last 7 days for return flights were $165 and $79 for one-way flights to Denver Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Aug 20 - Fri, Aug 22
SEA
Seattle - Tacoma Intl.
DEN
Denver Intl.
$165 Roundtrip, just found
$165
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Aug 20 from Seattle - Tacoma Intl. to Denver Intl., returning Fri, Aug 22, priced at $165 just found
Tue, Aug 19 - Fri, Aug 22
SEA
Seattle - Tacoma Intl.
DEN
Denver Intl.
$166 Roundtrip, just found
$166
Roundtrip
just found
Select Alaska Airlines flight, departing Tue, Aug 19 from Seattle - Tacoma Intl. to Denver Intl., returning Fri, Aug 22, priced at $166 just found
Wed, Aug 13 - Thu, Aug 14
SEA
Seattle - Tacoma Intl.
DEN
Denver Intl.
$167 Roundtrip, just found
$167
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Aug 13 from Seattle - Tacoma Intl. to Denver Intl., returning Thu, Aug 14, priced at $167 just found
Tue, Aug 12 - Wed, Aug 13
SEA
Seattle - Tacoma Intl.
DEN
Denver Intl.
$168 Roundtrip, just found
$168
Roundtrip
just found
Select Alaska Airlines flight, departing Tue, Aug 12 from Seattle - Tacoma Intl. to Denver Intl., returning Wed, Aug 13, priced at $168 just found
Wed, Oct 22 - Fri, Oct 24
PAE
Seattle Paine Field Intl. Airport
DEN
Denver Intl.
$245 Roundtrip, found 21 hours ago
$245
Roundtrip
found 21 hours ago
Select Alaska Airlines flight, departing Wed, Oct 22 from Seattle Paine Field Intl. Airport to Denver Intl., returning Fri, Oct 24, priced at $245 found 21 hours ago