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

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Alaska Airlines Flight 623 Route Deals From $94

The cheapest prices found with in the last 7 days for return flights were $99 and $94 for one-way flights to San Diego Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Apr 16 - Thu, Apr 23
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$99 Roundtrip, found 2 days ago
$99
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Thu, Apr 16 from Seattle - Tacoma Intl. to San Diego Intl., returning Thu, Apr 23, priced at $99 found 2 days ago
Wed, Feb 25 - Sat, Feb 28
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$101 Roundtrip, found 3 days ago
$101
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Wed, Feb 25 from Seattle - Tacoma Intl. to San Diego Intl., returning Sat, Feb 28, priced at $101 found 3 days ago
Mon, May 4 - Sat, May 9
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$119 Roundtrip, found 2 days ago
$119
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Mon, May 4 from Seattle - Tacoma Intl. to San Diego Intl., returning Sat, May 9, priced at $119 found 2 days ago
Thu, May 14 - Sun, May 24
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$139 Roundtrip, found 2 days ago
$139
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Seattle - Tacoma Intl. to San Diego Intl., returning Sun, May 24, priced at $139 found 2 days ago
Tue, Feb 24 - Wed, Feb 25
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$142 Roundtrip, found 3 days ago
$142
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Tue, Feb 24 from Seattle - Tacoma Intl. to San Diego Intl., returning Wed, Feb 25, priced at $142 found 3 days ago
Mon, Apr 20 - Wed, Apr 22
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$144 Roundtrip, found 2 days ago
$144
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Mon, Apr 20 from Seattle - Tacoma Intl. to San Diego Intl., returning Wed, Apr 22, priced at $144 found 2 days ago
Sat, May 2 - Sat, May 9
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$148 Roundtrip, found 2 days ago
$148
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, May 2 from Seattle - Tacoma Intl. to San Diego Intl., returning Sat, May 9, priced at $148 found 2 days ago
Tue, Feb 24 - Sat, Feb 28
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$153 Roundtrip, found 2 days ago
$153
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Tue, Feb 24 from Seattle - Tacoma Intl. to San Diego Intl., returning Sat, Feb 28, priced at $153 found 2 days ago
Mon, May 4 - Sat, May 9
SEA
Seattle - Tacoma Intl.
SAN
San Diego Intl.
$157 Roundtrip, found 2 days ago
$157
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Mon, May 4 from Seattle - Tacoma Intl. to San Diego Intl., returning Sat, May 9, priced at $157 found 2 days 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.