Originally Posted by Thisamura

T1 is now exclusively domestic. Copa uses T2 and you can use either "Smiles" contracted lounge if you are flying biz, or Star Alliance lounge in T3, if you are Star Gold (or flying biz, of course). It takes aprox 15 min to get to T3 from T2 (30 min total, so manage your time...), you just need to clear security at T2 and turn left to a long walkway to T3.