Alaska Airlines’ 10 Busiest Embraer E175 Routes From San Diego

Alaska Airlines has a significant presence at San Diego International Airport (SAN), connecting the airport to destinations across the US and Mexico, from New York (JFK) and Tampa (TPA) in the East to Honolulu (HNL) in the West. Last year, the carrier was the fifth-largest airline at San Diego International Airport by passengers carried, commanding an 11.3% market share last year:

1. Southwest Airlines – 33.9%
2. United Airlines – 12.6%
3. Delta Air Lines – 12.4%
4. American Airlines – 12.2%
5. Alaska Airlines – 11.3%

Many of Alaska Airlines’ routes from San Diego International Airport are operated by the Embraer E175 aircraft. The latest data from ch-aviation shows that the carrier currently has 86 E175s in its fleet, 44 of which are operated by Horizon Air and 42 by SkyWest Airlines. Regardless of the operating airline, each E175 can carry up to a maximum of 76 passengers in a two-class configuration – 12 in business class and 64 in economy class.

Using data from Cirium, an aviation analytics company, what are Alaska Airlines’ ten busiest routes operated by the Embraer E175 from San Diego International Airport in February 2025?

10

San Diego (SAN) – Fresno (FAT)

41 flights

In February 2025, Alaska Airlines will operate 41 flights in each direction with its Embraer E175 aircraft between San Diego International Airport (SAN) and Fresno Yosemite International Airport (FAT). The flights are operated by SkyWest Airlines under the Alaska Airlines brand.

Photo: Ian Dewar Photography | Shutterstock
 

Alaska Airlines is the only carrier to operate on the 314-mile route, which is the second-shortest route on this list. Flights have a scheduled block time of 1 hour 20 minutes each way.

9

San Diego (SAN) – San Francisco (SFO)

43 flights

In February 2025, Horizon Air will operate a total of 43 flights with the Embraer E175 aircraft in each direction between San Diego International Airport (SAN) and San Francisco International Airport (SFO).

Photo: Markus Mainka | Shutterstock

Alaska Airlines goes head-to-head with three other carriers on this popular route:

• Frontier Airlines
• Southwest Airlines
• United Airlines.

With 661,000 passengers across all airlines, San Francisco was the fourth-busiest domestic route from San Diego. United Airlines offers passengers the opportunity to connect to a wide variety of European and transpacific destinations from its West Coast hub at San Francisco International Airport, including Manila (MNL), Taipei (TPE), London Heathrow (LHR), and Brisbane (BNE).

8

San Diego (SAN) – Santa Rosa (STS)

44 flights

Alaska Airlines will operate 44 flights in each direction between San Diego International Airport (SAN) and Santa Rosa’s Charles M. Schulz-Sonoma County Airport (STS) in February 2025. All 44 flights are operated by SkyWest Airlines.

Photo: GingChen | Shutterstock

Charles M. Schulz-Sonoma County Airport is a small, regional airport, but sees regular scheduled commercial services from both American Airlines and Avelo Airlines, in addition to Alaska Airlines. The busiest route from the facility last year was to Seattle-Tacoma International Airport (SEA), with just over 53,000 passengers.

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7

San Diego (SAN) – Austin (AUS)

48 flights

In February 2025, Alaska Airlines will operate 48 flights with its Embraer E175 aircraft each way between San Diego International Airport (SAN) and Austin-Bergstrom International Airport (AUS). All 48 flights are operated by SkyWest Airlines.

Photo: Vincenzo Pace | Simple Flying

Alaska Airlines faces direct competition from Southwest Airlines on its route between San Diego and Austin. The low-cost carrier connects the two cities with its growing fleet of Boeing 737 aircraft and is by far the largest airline to operate at Austin-Bergstrom International Airport, boasting an impressive 42.4% market share.

6

San Diego (SAN) – San Luis Obispo (SBP)

56 flights

In February 2025, SkyWest Airlines will operate a total of 56 flights in each direction between San Diego International Airport (SAN) and San Luis Obispo County Regional Airport (SBP) on behalf of Alaska Airlines, equating to two flights per day.

Photo: Alaska Airlines

Alaska Airlines is the only carrier to fly the route. Last year, San Diego was the seventh-busiest destination from San Luis Obispo County Regional Airport, with 22,000 passengers. The five busiest routes were as follows:

1. Phoenix (PHX) – 74,000 passengers
2. Dallas/Fort Worth (DFW) – 60,000 passengers
3. Denver (DEN) – 59,000 passengers
4. San Francisco (SFO) – 52,000 passengers
5. Seattle (SEA) – 34,000 passengers.

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5

San Diego (SAN) – Monterey (MRY)

56 flights

Alaska Airlines’ fifth-busiest route from San Diego International Airport (SAN) by flights operated by the Embraer E175 is to Monterey Regional Airport (MRY) – not to be confused with Monterrey International Airport (MTY) in Mexico. In February 2025, SkyWest Airlines will operate 56 flights in each direction on the route on behalf of Alaska Airlines.

Photo: Alaska Airlines

In addition to services from Alaska Airlines, Monterey Regional Airport sees a handful of flights from five other carriers:

• Allegiant Air
• American Airlines
• JSX
• Sun Country Airlines
• United Airlines.

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4

San Diego (SAN) – Las Vegas (LAS)

70 flights

In February 2025, Alaska Airlines will operate a total of 70 flights between San Diego International Airport (SAN) and Las Vegas Harry Reid International Airport (LAS), making it the carrier’s fourth-busiest route from San Diego when measured by number of Embraer E175 flights.

Photo: Robin Guess | Shutterstock

However, when looking at passenger numbers across all airlines last year, Las Vegas was the busiest route overall from San Diego, with more than 780,000 passengers. The airport’s five busiest routes were as follows:

1. Las Vegas (LAS) – 780,000 passengers
2. Denver (DEN) – 771,000 passengers
3. Phoenix (PHX) – 689,000 passengers
4. San Francisco (SFO) – 661,000 passengers
5. Seattle (SEA) – 622,000 passengers.

Alaska Airlines is one of five carriers to operate the popular route between San Diego and Las Vegas, the other four being Delta Air Lines, Frontier Airlines, Southwest Airlines, and Spirit Airlines.

3

San Diego (SAN) – San Jose (SJC)

78 flights

Alaska Airlines’ third-busiest route operated by the Embraer E175 from San Diego International Airport (SAN) is to San Jose International Airport (SJC). In February 2025, SkyWest Airlines will operate 78 flights in each direction on the route on behalf of Alaska Airlines. Last year, San Jose was the seventh-busiest destination from San Diego International Airport across all airlines (Alaska Airlines, Southwest Airlines, and Spirit Airlines), with 589,000 passengers.

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2

San Diego (SAN) – Sacramento (SMF)

81 flights

In February 2025, Alaska Airlines will operate 81 flights with the Embraer E175 in each direction between San Diego International Airport (SAN) and Sacramento International Airport (SMF). San Diego was the second-busiest destination from Sacramento last year, with more than 571,000 passengers. The five busiest routes were as follows:

1. Las Vegas (LAS) – 680,000 passengers
2. San Diego (SAN) – 571,000 passengers
3. Denver (DEN) – 519,000 passengers
4. Seattle (SEA) – 431,000 passengers
5. Phoenix (PHX) – 401,000 passengers.

1

San Diego (SAN) – San Francisco (SFO)

124 flights

Alaska Airlines’ busiest route with the Embraer E175 from San Diego International Airport (SAN) is, perhaps unsurprisingly, to San Francisco International Airport (SFO). In February 2025, SkyWest Airlines will operate 124 flights each way on behalf of Alaska Airlines, and when combined with the 43 flights also operated by Horizon Air, the carrier has a total of 167 flights in each direction between the two cities, averaging around six flights per day.

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Alaska Airlines’ ten busiest routes operated by the Embraer E175 aircraft from San Diego International Airport in February 2025 are summarized in the table below:

Photo: Philip Pilosian | Shutterstock

In addition to the Embraer E175s operated by SkyWest Airlines and Horizon Air, Alaska Airlines operates a varied fleet of Boeing 737 family aircraft, made up of the following:

• Boeing 737-700 x 11
• Boeing 737-800 x 59
• Boeing 737-900ER x 75
• Boeing 737 MAX 8 x 5
• Boeing 737 MAX 9 x 73.

The carrier also has a further 125 Boeing 737 MAXs on order, including 103 737 MAX 10s.