Wear the combination before the journey
Pick clothes you have already sat in for a reasonable stretch of time. A soft waistband and enough room through the hips can be more useful than a new outfit chosen only because it looks suitable for travel. Check zips, buttons and pockets when seated, including anything that presses against you beneath a belt.
Try the outfit with your cabin bag on your shoulder or back. A strap may catch a loose sleeve or pull a collar sideways. If you wear a long cardigan, check that it does not trail when you sit down or lift your luggage. Familiar clothes still deserve a complete rehearsal with the items you will carry.
Keep a layer within reach
A T-shirt or light knit with an open shirt, cardigan or zip layer gives you something to remove independently. Put any extra layer near the top of your bag. You may not want to open the main luggage in a busy aisle just to find a jumper.
Leave time to check the practical details
Shoes should suit the walking you expect at the airport and the outfit you are wearing. Avoid choosing a pair that already pinches at home. Check the airport and airline's current instructions separately for security procedures and baggage limits; an outfit guide cannot tell you what a particular journey will require.
Allow for the destination
If the weather will change substantially when you arrive, pack a suitable top where you can find it. Carrying a heavy coat may make sense for a cold departure, but decide where it will go later. Keep essential small items together so moving between pockets and bags does not leave your travel documents in the wrong place. The aim is a manageable journey, not a perfect airport photograph.
