Alaska Airlines Flight UA128 Deals & Information (2025/2026)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Alaska Airlines Flight 128 Route Deals From $69

The cheapest prices found with in the last 7 days for return flights were $77 and $69 for one-way flights to San Francisco Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Oct 15 - Mon, Oct 20
PDX
Portland Intl.
SFO
San Francisco Intl.
$77 Roundtrip, found 5 days ago
$77
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Wed, Oct 15 from Portland Intl. to San Francisco Intl., returning Mon, Oct 20, priced at $77 found 5 days ago
Thu, Sep 11 - Wed, Oct 15
PDX
Portland Intl.
SFO
San Francisco Intl.
$78 Roundtrip, found 4 days ago
$78
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Sep 11 from Portland Intl. to San Francisco Intl., returning Wed, Oct 15, priced at $78 found 4 days ago
Thu, Feb 19 - Wed, Feb 25
PDX
Portland Intl.
SFO
San Francisco Intl.
$97 Roundtrip, just found
$97
Roundtrip
just found
Select Alaska Airlines flight, departing Thu, Feb 19 from Portland Intl. to San Francisco Intl., returning Wed, Feb 25, priced at $97 just found
Thu, Feb 19 - Wed, Feb 25
PDX
Portland Intl.
SFO
San Francisco Intl.
$107 Roundtrip, found 13 hours ago
$107
Roundtrip
found 13 hours ago
Select Alaska Airlines flight, departing Thu, Feb 19 from Portland Intl. to San Francisco Intl., returning Wed, Feb 25, priced at $107 found 13 hours ago
Mon, Sep 15 - Tue, Sep 23
PDX
Portland Intl.
SFO
San Francisco Intl.
$114 Roundtrip, found 4 days ago
$114
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Mon, Sep 15 from Portland Intl. to San Francisco Intl., returning Tue, Sep 23, priced at $114 found 4 days ago
Sat, Jan 10 - Mon, Jan 12
PDX
Portland Intl.
SFO
San Francisco Intl.
$117 Roundtrip, found 1 day ago
$117
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Jan 10 from Portland Intl. to San Francisco Intl., returning Mon, Jan 12, priced at $117 found 1 day ago
Tue, Dec 2 - Mon, Dec 8
PDX
Portland Intl.
SFO
San Francisco Intl.
$127 Roundtrip, found 2 hours ago
$127
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Tue, Dec 2 from Portland Intl. to San Francisco Intl., returning Mon, Dec 8, priced at $127 found 2 hours ago
Fri, Oct 24 - Tue, Oct 28
PDX
Portland Intl.
SFO
San Francisco Intl.
$132 Roundtrip, found 2 hours ago
$132
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Fri, Oct 24 from Portland Intl. to San Francisco Intl., returning Tue, Oct 28, priced at $132 found 2 hours ago
Tue, Jan 6 - Wed, Jan 7
PDX
Portland Intl.
SFO
San Francisco Intl.
$137 Roundtrip, found 22 hours ago
$137
Roundtrip
found 22 hours ago
Select Alaska Airlines flight, departing Tue, Jan 6 from Portland Intl. to San Francisco Intl., returning Wed, Jan 7, priced at $137 found 22 hours ago
Tue, Sep 9 - Tue, Sep 23
PDX
Portland Intl.
SFO
San Francisco Intl.
$139 Roundtrip, found 13 hours ago
$139
Roundtrip
found 13 hours ago
Select Alaska Airlines flight, departing Tue, Sep 9 from Portland Intl. to San Francisco Intl., returning Tue, Sep 23, priced at $139 found 13 hours ago
Thu, Sep 11 - Wed, Oct 15
PDX
Portland Intl.
SFO
San Francisco Intl.
$139 Roundtrip, found 4 days ago
$139
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Sep 11 from Portland Intl. to San Francisco Intl., returning Wed, Oct 15, priced at $139 found 4 days ago
Tue, Nov 25 - Fri, Nov 28
PDX
Portland Intl.
SFO
San Francisco Intl.
$142 Roundtrip, found 9 hours ago
$142
Roundtrip
found 9 hours ago
Select Alaska Airlines flight, departing Tue, Nov 25 from Portland Intl. to San Francisco Intl., returning Fri, Nov 28, priced at $142 found 9 hours ago