My itinerary
Feb 1 TPE-TYS
Feb 4 TYS-MCO
Feb 8 MCO-TPE
CX(transpacific)-AA(US domestic) costs around TWD 75,000, while
DL costs TWD 60,000.
Both are higher than usual due to the lunar new year holidays.
If I shifted the whole thing to Feb 5-Feb 12, then CX-AA costs TWD 52,000, and DL costs TWD 39,900. All include taxes.
For business class, The Feb 1 itinerary in CX-AA costs TWD 141,200, and TWD 114,200 for DL.