I bought a pair of Athleta Brooklyn Pants (they have different cuts: wide leg, joggers, shorts, etc.) for a recent long flight and 9-day trip. They are such a perfect travel pant! They can easily be dressed up, but they're as comfortable as sweat pants. They're super lightweight (meaning they take up minimal space in your bag and also feel breezy on your body), moisture-wicking, and quick-dry for summer (which means I could wear them for a bike ride and still pop into a cafe and not worry about unsightly sweat marks. They're also wrinkle resistant, so you can stand up not show 8 hours of sitting on a plane or days of being crammed in a bag. Bonus that it's made of recycled polyester. You can search Athleta for "featherlight stretch," which is the fabric used in these pants and see more options. I liked these so much that I ended up buying the Skyline shorts as well, which I also loved.