How to Pack Suit in Suitcase
Try Carry-on Suitcase Method:
If you think the wrinkle would be there in large suit case due to presence of other items then carry on suitcase would be the best bet.
Dry-Cleaning Bag Method:
Try folding your suit in a plastic bag that way you wouldn’t have a problem with creases and wrinkles suit.
Over-packing harms the suits and other formals so avoid!
Do follow the tips mentioned above for wrinkle free suits and formals during the trip.