Originally Posted by abhilife2001

At the outset, am a novice to SQ / KF

Am exploring the SQ website to see the possible routings for a Portland (PDX) to Kolkata (CCU) trip. The SQ website does not show Portland as a airport I can select (and that is probably because SQ does not fly there). If I select LAX, then it shows routings. I was assuming SQ will show UA flight options for the US domestic sectors to connect in LAX, but it did not.
Question - How and where can I search for itineraries which have a mix of SQ and other *A metal?

Guidance appreciated. Thx