Alaska Airlines Flight 637 Deals & Information (2026/2027)

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Alaska Airlines Flight 637 Route Deals From $114

The cheapest prices found with in the last 7 days for return flights were $209 and $114 for one-way flights to Seattle - Tacoma Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jun 2 - Tue, Jun 9
PHX
Sky Harbor Intl.
SEA
Seattle - Tacoma Intl.
$209 Roundtrip, found 21 hours ago
$209
Roundtrip
found 21 hours ago
Select Alaska Airlines flight, departing Tue, Jun 2 from Sky Harbor Intl. to Seattle - Tacoma Intl., returning Tue, Jun 9, priced at $209 found 21 hours ago
Tue, Jun 2 - Tue, Jun 9
PHX
Sky Harbor Intl.
SEA
Seattle - Tacoma Intl.
$214 Roundtrip, found 21 hours ago
$214
Roundtrip
found 21 hours ago
Select Alaska Airlines flight, departing Tue, Jun 2 from Sky Harbor Intl. to Seattle - Tacoma Intl., returning Tue, Jun 9, priced at $214 found 21 hours ago
Wed, Jun 3 - Sat, Jun 6
PHX
Sky Harbor Intl.
SEA
Seattle - Tacoma Intl.
$217 Roundtrip, just found
$217
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Jun 3 from Sky Harbor Intl. to Seattle - Tacoma Intl., returning Sat, Jun 6, priced at $217 just found
Wed, Jun 3 - Sat, Jun 6
PHX
Sky Harbor Intl.
SEA
Seattle - Tacoma Intl.
$222 Roundtrip, just found
$222
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Jun 3 from Sky Harbor Intl. to Seattle - Tacoma Intl., returning Sat, Jun 6, priced at $222 just found
Wed, Jun 3 - Sat, Jun 6
PHX
Sky Harbor Intl.
SEA
Seattle - Tacoma Intl.
$224 Roundtrip, just found
$224
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Jun 3 from Sky Harbor Intl. to Seattle - Tacoma Intl., returning Sat, Jun 6, priced at $224 just found
Wed, Jun 3 - Sun, Jun 7
PHX
Sky Harbor Intl.
SEA
Seattle - Tacoma Intl.
$227 Roundtrip, found 1 hour ago
$227
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Wed, Jun 3 from Sky Harbor Intl. to Seattle - Tacoma Intl., returning Sun, Jun 7, priced at $227 found 1 hour ago
Wed, Jun 3 - Sat, Jun 13
PHX
Sky Harbor Intl.
SEA
Seattle - Tacoma Intl.
$229 Roundtrip, found 13 hours ago
$229
Roundtrip
found 13 hours ago
Select Alaska Airlines flight, departing Wed, Jun 3 from Sky Harbor Intl. to Seattle - Tacoma Intl., returning Sat, Jun 13, priced at $229 found 13 hours ago
Tue, Jun 2 - Tue, Jun 9
PHX
Sky Harbor Intl.
SEA
Seattle - Tacoma Intl.
$234 Roundtrip, found 21 hours ago
$234
Roundtrip
found 21 hours ago
Select Alaska Airlines flight, departing Tue, Jun 2 from Sky Harbor Intl. to Seattle - Tacoma Intl., returning Tue, Jun 9, priced at $234 found 21 hours ago
Wed, Jun 3 - Tue, Jun 9
PHX
Sky Harbor Intl.
SEA
Seattle - Tacoma Intl.
$235 Roundtrip, found 1 hour ago
$235
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Wed, Jun 3 from Sky Harbor Intl. to Seattle - Tacoma Intl., returning Tue, Jun 9, priced at $235 found 1 hour ago
Wed, Jun 3 - Tue, Jun 9
PHX
Sky Harbor Intl.
SEA
Seattle - Tacoma Intl.
$239 Roundtrip, found 1 hour ago
$239
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Wed, Jun 3 from Sky Harbor Intl. to Seattle - Tacoma Intl., returning Tue, Jun 9, priced at $239 found 1 hour ago
Wed, Jun 3 - Sat, Jun 6
PHX
Sky Harbor Intl.
SEA
Seattle - Tacoma Intl.
$240 Roundtrip, just found
$240
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Jun 3 from Sky Harbor Intl. to Seattle - Tacoma Intl., returning Sat, Jun 6, priced at $240 just found
Fri, Jun 5 - Mon, Jun 8
PHX
Sky Harbor Intl.
SEA
Seattle - Tacoma Intl.
$243 Roundtrip, just found
$243
Roundtrip
just found
Select Alaska Airlines flight, departing Fri, Jun 5 from Sky Harbor Intl. to Seattle - Tacoma Intl., returning Mon, Jun 8, priced at $243 just found
Sat, Oct 3 - Tue, Oct 6
PHX
Sky Harbor Intl.
SEA
Seattle - Tacoma Intl.
$243 Roundtrip, found 13 hours ago
$243
Roundtrip
found 13 hours ago
Select Alaska Airlines flight, departing Sat, Oct 3 from Sky Harbor Intl. to Seattle - Tacoma Intl., returning Tue, Oct 6, priced at $243 found 13 hours ago
Wed, Jun 3 - Sat, Jun 6
PHX
Sky Harbor Intl.
SEA
Seattle - Tacoma Intl.
$246 Roundtrip, just found
$246
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Jun 3 from Sky Harbor Intl. to Seattle - Tacoma Intl., returning Sat, Jun 6, priced at $246 just found