Seattle/Tacoma Intl, Los Angeles, and Anchorage are the top three Alaska Airlines airports based on our airline data. This may change if Alaska Airlines makes updates to their flight routes due to supply and demand.
A flight from Los Angeles to Las Vegas Harry Reid Intl, which has 0 stops, is S$ 115 which is the least expensive round-trip domestic flight that Alaska Airlines offers. For a one-way domestic Alaska Airlines flight, the cheapest route is San Francisco to Los Angeles (0 stops) for S$ 56.
Alaska Airlines does not have flights from Singapore Changi at the moment. There are scheduled flights with Alaska Airlines out of Perth though (if you don’t mind flying from this airport). Flying with Emirates is recommended if you still want to fly from Singapore Changi.