Besides Antioch and Iconium, in which city does 2 Timothy 3:11 say Paul suffered persecution?

Answer: Lystra

Timothy had observed Paul's sufferings "in Antioch, Iconium, and Lystra," yet the Lord rescued him from all of them.

“You, however, have observed my teaching, my conduct, my purpose, my faith, my patience, my love, my perseverance, my persecutions, and the sufferings that came upon me in Antioch, Iconium, and Lystra. What persecutions I endured! Yet the Lord rescued me from all of them.”— 2 Timothy 3:10-11 (BSB)