Alaska Airlines adds fourth carrier on busy Phoenix-San Diego route after two decades

Southwest Airlines remains the dominant carrier on this route, carrying about 59.5% of local passengers. American Airlines holds a share of roughly 20.7%, while Frontier accounts for approximately 18.3%. The remainder of passengers either flew with another carrier or made connections en route.

In addition to direct travelers, another 1,712 passengers per day connected through Phoenix or less commonly through San Diego, bringing the total daily passenger count to 3,689 for this market segment.

American Airlines carried the most connecting passengers—987 daily—while Southwest had 662 and Frontier had 91. Over seventy percent of American’s traffic consisted of transit passengers at Sky Harbor, with Washington Reagan being a common connecting destination.

San Diego ranked as Phoenix’s eleventh most popular local market during this period. Denver was the top airport-level local market from Phoenix with over twice as many daily round-trip local passengers as San Diego.

"Phoenix Sky Harbor International Airport

America/Phoenix

IATA Code

PHX

City

Phoenix

Country

United States

Designation

Major-Domestic

IATA/ICAO Code

PHX/KPHX

ICAO Code

KPHX"

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