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

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Alaska Airlines Flight 642 Route Deals From $60

The cheapest prices found with in the last 7 days for return flights were $97 and $60 for one-way flights to Denver Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Feb 21 - Wed, Feb 25
SEA
Seattle - Tacoma Intl.
DEN
Denver Intl.
$97 Roundtrip, found 1 day ago
$97
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Feb 21 from Seattle - Tacoma Intl. to Denver Intl., returning Wed, Feb 25, priced at $97 found 1 day ago
Sat, Jan 10 - Thu, Jan 15
SEA
Seattle - Tacoma Intl.
DEN
Denver Intl.
$103 Roundtrip, just found
$103
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, Jan 10 from Seattle - Tacoma Intl. to Denver Intl., returning Thu, Jan 15, priced at $103 just found
Thu, Jan 8 - Sat, Jan 10
SEA
Seattle - Tacoma Intl.
DEN
Denver Intl.
$111 Roundtrip, found 4 hours ago
$111
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Thu, Jan 8 from Seattle - Tacoma Intl. to Denver Intl., returning Sat, Jan 10, priced at $111 found 4 hours ago
Thu, Feb 5 - Mon, Feb 9
SEA
Seattle - Tacoma Intl.
DEN
Denver Intl.
$112 Roundtrip, found 4 hours ago
$112
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Thu, Feb 5 from Seattle - Tacoma Intl. to Denver Intl., returning Mon, Feb 9, priced at $112 found 4 hours ago
Thu, Feb 5 - Sun, Feb 8
SEA
Seattle - Tacoma Intl.
DEN
Denver Intl.
$115 Roundtrip, found 2 hours ago
$115
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Thu, Feb 5 from Seattle - Tacoma Intl. to Denver Intl., returning Sun, Feb 8, priced at $115 found 2 hours ago