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 $87 and for one-way flights to Denver Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Dec 16 - Tue, Dec 23
SEA
Seattle - Tacoma Intl.
DEN
Denver Intl.
$87 Roundtrip, found 3 hours ago
$87
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Tue, Dec 16 from Seattle - Tacoma Intl. to Denver Intl., returning Tue, Dec 23, priced at $87 found 3 hours ago
Mon, Dec 15 - Wed, Dec 17
SEA
Seattle - Tacoma Intl.
DEN
Denver Intl.
$89 Roundtrip, found 1 hour ago
$89
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Mon, Dec 15 from Seattle - Tacoma Intl. to Denver Intl., returning Wed, Dec 17, priced at $89 found 1 hour ago
Mon, Dec 15 - Wed, Dec 17
SEA
Seattle - Tacoma Intl.
DEN
Denver Intl.
$93 Roundtrip, found 1 hour ago
$93
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Mon, Dec 15 from Seattle - Tacoma Intl. to Denver Intl., returning Wed, Dec 17, priced at $93 found 1 hour ago
Fri, Dec 12 - Wed, Dec 17
SEA
Seattle - Tacoma Intl.
DEN
Denver Intl.
$99 Roundtrip, found 2 hours ago
$99
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Fri, Dec 12 from Seattle - Tacoma Intl. to Denver Intl., returning Wed, Dec 17, priced at $99 found 2 hours ago
Thu, Dec 11 - Sun, Dec 14
SEA
Seattle - Tacoma Intl.
DEN
Denver Intl.
$103 Roundtrip, just found
$103
Roundtrip
just found
Select Alaska Airlines flight, departing Thu, Dec 11 from Seattle - Tacoma Intl. to Denver Intl., returning Sun, Dec 14, priced at $103 just found
Fri, Jan 30 - Mon, Feb 2
SEA
Seattle - Tacoma Intl.
DEN
Denver Intl.
$107 Roundtrip, just found
$107
Roundtrip
just found
Select Alaska Airlines flight, departing Fri, Jan 30 from Seattle - Tacoma Intl. to Denver Intl., returning Mon, Feb 2, priced at $107 just found