Alaska Airlines Flight 637 Deals & Information (2025/2026)

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Alaska Airlines Flight 637 Route Deals From $60

The cheapest prices found with in the last 7 days for return flights were $121 and $60 for one-way flights to Seattle - Tacoma Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jun 24 - Tue, Jul 1
PHX
Sky Harbor Intl.
PAE
Seattle Paine Field Intl. Airport
$121 Roundtrip, found 3 days ago
$121
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Tue, Jun 24 from Sky Harbor Intl. to Seattle Paine Field Intl. Airport, returning Tue, Jul 1, priced at $121 found 3 days ago
Tue, Jul 22 - Wed, Jul 23
PHX
Sky Harbor Intl.
SEA
Seattle - Tacoma Intl.
$124 Roundtrip, found 2 days ago
$124
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Tue, Jul 22 from Sky Harbor Intl. to Seattle - Tacoma Intl., returning Wed, Jul 23, priced at $124 found 2 days ago
Fri, Aug 15 - Mon, Aug 18
PHX
Sky Harbor Intl.
PAE
Seattle Paine Field Intl. Airport
$126 Roundtrip, found 4 days ago
$126
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Fri, Aug 15 from Sky Harbor Intl. to Seattle Paine Field Intl. Airport, returning Mon, Aug 18, priced at $126 found 4 days ago
Thu, Jun 5 - Wed, Jun 11
PHX
Sky Harbor Intl.
PAE
Seattle Paine Field Intl. Airport
$128 Roundtrip, found 3 days ago
$128
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, Jun 5 from Sky Harbor Intl. to Seattle Paine Field Intl. Airport, returning Wed, Jun 11, priced at $128 found 3 days ago
Wed, Jul 16 - Fri, Jul 25
PHX
Sky Harbor Intl.
PAE
Seattle Paine Field Intl. Airport
$132 Roundtrip, found 3 days ago
$132
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Wed, Jul 16 from Sky Harbor Intl. to Seattle Paine Field Intl. Airport, returning Fri, Jul 25, priced at $132 found 3 days ago
Sat, Jul 12 - Tue, Jul 29
PHX
Sky Harbor Intl.
PAE
Seattle Paine Field Intl. Airport
$133 Roundtrip, found 3 days ago
$133
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sat, Jul 12 from Sky Harbor Intl. to Seattle Paine Field Intl. Airport, returning Tue, Jul 29, priced at $133 found 3 days ago
Wed, Jun 11 - Wed, Jun 18
PHX
Sky Harbor Intl.
SEA
Seattle - Tacoma Intl.
$135 Roundtrip, found 6 hours ago
$135
Roundtrip
found 6 hours ago
Select Alaska Airlines flight, departing Wed, Jun 11 from Sky Harbor Intl. to Seattle - Tacoma Intl., returning Wed, Jun 18, priced at $135 found 6 hours ago
Wed, Jun 18 - Mon, Jun 30
PHX
Sky Harbor Intl.
PAE
Seattle Paine Field Intl. Airport
$138 Roundtrip, just found
$138
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Jun 18 from Sky Harbor Intl. to Seattle Paine Field Intl. Airport, returning Mon, Jun 30, priced at $138 just found
Tue, Jun 3 - Fri, Jun 6
PHX
Sky Harbor Intl.
PAE
Seattle Paine Field Intl. Airport
$142 Roundtrip, found 3 days ago
$142
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Tue, Jun 3 from Sky Harbor Intl. to Seattle Paine Field Intl. Airport, returning Fri, Jun 6, priced at $142 found 3 days ago