Away Carry-On Flex (£265)
The bestselling Away Carry-On Flex is an internet favourite. While it comes in a classic model, the brand also has this handy expandable option. It's a smart choice for a weekend trip — if you buy something, you'll have room to bring it back. This bag would be considered a carry-on when not fully expanded, but if you were to utilise the feature, some airlines may require you to check the bag.