Asiana Airlines, one of Skytrax's certified 5 out of 5 stars rated World's Best Airlines have round trip airfares travelling from Chicago (ORD) to Manila Philippines (MNL) for $587, making one stop in Seoul Korea.
Departs ORD: late February thru early May and then again late August thru mid-November 2018
Returns: good availability thru end of November
Book it on Expedia [expedia.com]
or Asiana Airlines [flyasiana.com]
directly. Bundling hotel with airfare will save money.