As you're travelling with a suit, you'll need to make sure that the suitcase you choose is large enough to get the suit in comfortably, without squashing it too much. This will also help to prevent wrinkles.
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However, wearing your suit during your flight will result in wrinkles. Placing it in the overhead bin is even riskier. In this case, we recommend packing the suit, even if it takes up a lot of space in your bag. For your suit to arrive sharp and wrinkle-free, pack it properly in your bag.
While we typically recommend rolling clothes for travel, suits are our special exception. Pack your suit jacket and suit pants separately (see detail below). Pack your suit last. Leverage packing cubes and shoe bags to optimize bag space and keep your garments clean.
Although lucking into closet space is the ideal scenario, experts say another option is to fold the garment bag and place it over a small carry-on in the overhead space. Travelers will want to keep watch over the bin and ensure the item doesn't get moved or crushed.
Traveling with a compression bag takes a lot of the stress out of packing for a trip, especially if you're trying to dodge checked bag fees. But even if everything fits easily into your carry-on, or you're checking a bag for a longer trip, a compression sack can still come in handy.