Alaska Airlines Flight 2123 Deals & Information (2025/2026)

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Alaska Airlines Flight 2123 Route Deals From

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

Sat, Jan 24 - Sun, Jan 25
BOI
Boise
SEA
Seattle - Tacoma Intl.
$79 Roundtrip, found 2 days ago
$79
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, Jan 24 from Boise to Seattle - Tacoma Intl., returning Sun, Jan 25, priced at $79 found 2 days ago
Thu, Feb 5 - Sun, Feb 8
BOI
Boise
SEA
Seattle - Tacoma Intl.
$80 Roundtrip, found 1 day ago
$80
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Feb 5 from Boise to Seattle - Tacoma Intl., returning Sun, Feb 8, priced at $80 found 1 day ago
Sat, Jan 17 - Sun, Jan 18
BOI
Boise
SEA
Seattle - Tacoma Intl.
$89 Roundtrip, found 2 days ago
$89
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, Jan 17 from Boise to Seattle - Tacoma Intl., returning Sun, Jan 18, priced at $89 found 2 days ago
Thu, Feb 5 - Sun, Feb 8
BOI
Boise
SEA
Seattle - Tacoma Intl.
$91 Roundtrip, found 1 day ago
$91
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Feb 5 from Boise to Seattle - Tacoma Intl., returning Sun, Feb 8, priced at $91 found 1 day ago
Fri, Feb 27 - Mon, Mar 2
BOI
Boise
SEA
Seattle - Tacoma Intl.
$99 Roundtrip, found 3 hours ago
$99
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Fri, Feb 27 from Boise to Seattle - Tacoma Intl., returning Mon, Mar 2, priced at $99 found 3 hours ago
Thu, Jan 15 - Wed, Jan 21
BOI
Boise
SEA
Seattle - Tacoma Intl.
$100 Roundtrip, found 1 hour ago
$100
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Thu, Jan 15 from Boise to Seattle - Tacoma Intl., returning Wed, Jan 21, priced at $100 found 1 hour ago
Thu, Jan 15 - Wed, Jan 21
BOI
Boise
SEA
Seattle - Tacoma Intl.
$101 Roundtrip, found 1 hour ago
$101
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Thu, Jan 15 from Boise to Seattle - Tacoma Intl., returning Wed, Jan 21, priced at $101 found 1 hour ago
Mon, Jan 12 - Tue, Jan 20
BOI
Boise
SEA
Seattle - Tacoma Intl.
$108 Roundtrip, found 3 days ago
$108
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Mon, Jan 12 from Boise to Seattle - Tacoma Intl., returning Tue, Jan 20, priced at $108 found 3 days ago
Sat, Jan 17 - Sun, Jan 18
BOI
Boise
SEA
Seattle - Tacoma Intl.
$109 Roundtrip, found 2 days ago
$109
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, Jan 17 from Boise to Seattle - Tacoma Intl., returning Sun, Jan 18, priced at $109 found 2 days ago
Thu, Jan 29 - Wed, Feb 4
BOI
Boise
SEA
Seattle - Tacoma Intl.
$110 Roundtrip, found 2 days ago
$110
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Thu, Jan 29 from Boise to Seattle - Tacoma Intl., returning Wed, Feb 4, priced at $110 found 2 days ago
Thu, Jan 29 - Sun, Feb 1
BOI
Boise
SEA
Seattle - Tacoma Intl.
$111 Roundtrip, found 2 days ago
$111
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Thu, Jan 29 from Boise to Seattle - Tacoma Intl., returning Sun, Feb 1, priced at $111 found 2 days ago
Tue, Jan 13 - Sun, Jan 18
BOI
Boise
SEA
Seattle - Tacoma Intl.
$118 Roundtrip, found 5 days ago
$118
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue, Jan 13 from Boise to Seattle - Tacoma Intl., returning Sun, Jan 18, priced at $118 found 5 days ago
Tue, Mar 3 - Fri, Mar 6
BOI
Boise
SEA
Seattle - Tacoma Intl.
$119 Roundtrip, found 4 days ago
$119
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Tue, Mar 3 from Boise to Seattle - Tacoma Intl., returning Fri, Mar 6, priced at $119 found 4 days ago
Tue, Jan 20 - Fri, Jan 23
BOI
Boise
SEA
Seattle - Tacoma Intl.
$120 Roundtrip, found 2 days ago
$120
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Tue, Jan 20 from Boise to Seattle - Tacoma Intl., returning Fri, Jan 23, priced at $120 found 2 days ago
Tue, Jan 20 - Fri, Jan 23
BOI
Boise
SEA
Seattle - Tacoma Intl.
$122 Roundtrip, found 2 days ago
$122
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Tue, Jan 20 from Boise to Seattle - Tacoma Intl., returning Fri, Jan 23, priced at $122 found 2 days ago
Tue, Jan 13 - Wed, Jan 14
BOI
Boise
SEA
Seattle - Tacoma Intl.
$128 Roundtrip, found 6 days ago
$128
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Tue, Jan 13 from Boise to Seattle - Tacoma Intl., returning Wed, Jan 14, priced at $128 found 6 days ago
Sat, Jan 17 - Sun, Jan 18
BOI
Boise
SEA
Seattle - Tacoma Intl.
$128 Roundtrip, found 2 days ago
$128
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, Jan 17 from Boise to Seattle - Tacoma Intl., returning Sun, Jan 18, priced at $128 found 2 days ago