Originally Posted by
bse118
Can't speak to the pricing (and OP doesn't tell us about any return plans so might be roundtrip here)...but aa.com certainly pulls it up if you enter TSA as the destination (not TPE).

Fare quote may or may not be valid with multi-city (you only find out when you attempt to purchase). But yes, these fares look to be valid and the PE fare is actually the cheapest. I used TPE instead of TSA in previous search (since OP said TPE) and ITA is seeing this fare to TSA too.