Alaska Airlines Flight 623 Deals & Information (2026/2027)

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Alaska Airlines Flight 623 Route Deals From $65

The cheapest prices found with in the last 7 days for return flights were $97 and $65 for one-way flights to San Diego Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, May 1 - Tue, May 5
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$97 Roundtrip, just found
$97
Roundtrip
just found
Select Alaska Airlines flight, departing Fri, May 1 from Seattle - Tacoma Intl. to San Diego Intl., returning Tue, May 5, priced at $97 just found
Fri, Feb 6 - Mon, Feb 9
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$98 Roundtrip, found 3 hours ago
$98
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Fri, Feb 6 from Seattle - Tacoma Intl. to San Diego Intl., returning Mon, Feb 9, priced at $98 found 3 hours ago
Fri, Feb 6 - Mon, Feb 9
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$99 Roundtrip, found 3 hours ago
$99
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Fri, Feb 6 from Seattle - Tacoma Intl. to San Diego Intl., returning Mon, Feb 9, priced at $99 found 3 hours ago
Thu, May 7 - Tue, May 19
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$117 Roundtrip, found 6 hours ago
$117
Roundtrip
found 6 hours ago
Select Alaska Airlines flight, departing Thu, May 7 from Seattle - Tacoma Intl. to San Diego Intl., returning Tue, May 19, priced at $117 found 6 hours ago
Wed, Mar 11 - Wed, Mar 18
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$119 Roundtrip, found 15 hours ago
$119
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Wed, Mar 11 from Seattle - Tacoma Intl. to San Diego Intl., returning Wed, Mar 18, priced at $119 found 15 hours ago
Wed, Mar 11 - Tue, Mar 17
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$121 Roundtrip, found 4 hours ago
$121
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Wed, Mar 11 from Seattle - Tacoma Intl. to San Diego Intl., returning Tue, Mar 17, priced at $121 found 4 hours ago
Tue, Mar 3 - Sat, Mar 7
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$126 Roundtrip, found 11 hours ago
$126
Roundtrip
found 11 hours ago
Select Alaska Airlines flight, departing Tue, Mar 3 from Seattle - Tacoma Intl. to San Diego Intl., returning Sat, Mar 7, priced at $126 found 11 hours ago
Fri, May 1 - Mon, May 4
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$127 Roundtrip, found 3 hours ago
$127
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Fri, May 1 from Seattle - Tacoma Intl. to San Diego Intl., returning Mon, May 4, priced at $127 found 3 hours ago
Fri, Feb 6 - Mon, Feb 9
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$129 Roundtrip, found 3 hours ago
$129
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Fri, Feb 6 from Seattle - Tacoma Intl. to San Diego Intl., returning Mon, Feb 9, priced at $129 found 3 hours ago
Thu, Jan 29 - Wed, Feb 4
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$130 Roundtrip, found 2 hours ago
$130
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Thu, Jan 29 from Seattle - Tacoma Intl. to San Diego Intl., returning Wed, Feb 4, priced at $130 found 2 hours ago

Frequently asked questions

What route does flight number AS623 take?
Flight number AS623 takes about 2 hours and 55 minutes to fly directly from DIA airport to Sea-Tac Airport. Sure, there's magic in the destination, but the journey is always half the fun!
How often is AS623 on time?
Alaska Airlines flight number AS623 from DIA airport to Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) lands on time 93% of the time — so you can rest easy knowing you'll arrive at your destination ASAP. If this trip happens to be delayed, you're likely to wait roughly 44 minutes. This route has a 2.85-star rating.
What kind of plane is on flight number AS623?
The route for flight number AS623 is nearly always DEN to Seattle - Tacoma Intl. Airport (SEA), and the Boeing 737-900 is the type of plane you're likely to be flying on.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your AS623 flight with Travelocity, please visit our Customer Service Portal.