I found a good range of real carry-on suitcases, mostly hardside with spinner wheels and TSA locks. The Flight Knight 22x14x9 is a standout for its low price and airline-size dimensions, and the Coolife 20-inch set suits those who want a set. Which type do you prefer: hardside, softside or expandable?
Which type of carry-on do you prefer?
Hardside spinners
Hard shells with spinner wheels for impact resistance on frequent trips.
Best priceFlight Knight Suitcase 22x14x9 Carry On Hardside With Built In TSA Lock & USB Port Lightweight Luggage Silent Double Spinner Wheels Maximum Carry-On Bag Size For American & United Approved Airlines
Sized at 22x14x9 for carry-on limits, with a built-in TSA lock, USB port and silent double spinner wheels. The lowest price among the hardside picks.
Expandable Carry On Luggage Lightweight Hardside Suitcase With Spinner Wheels Durable Travel Case Expandable Carry On Luggage Lightweight Hardside Suitcase With Spinner Wheels Durable Travel Case
Tough ABS shell, spinner wheels and an expandable design, described as lightweight for regular travelers.
White Hardside Carry On Spinner Luggage, Expandable Suitcase With Wheels, Travel Bag White Hardside Carry On Spinner Luggage, Expandable Suitcase With Wheels, Travel Bag
Extra-thick ABS hardside with spinner wheels and an expandable design, in white.
Expandable carry-ons
Extra packing room when you need it, while keeping a carry-on footprint.

Flight Knight 21.5x15.5x9 Expandable Carry On Suitcase Hardside TSA Lock & USB C Port Lightweight Luggage Silent Double Spinner Wheels Maximum Canada Air Overhead Carry-On Bag Many Airlines Approved
Hardside at 21.5x15.5x9 with TSA lock, USB-C port and double spinner wheels. An affordable option for frequent flyers.

Flight Knight 22x14x9" Expandable Carry On Suitcase Hardside TSA Lock USB C Port Lightweight Luggage Silent Double Spinner Wheels Maximum Overhead Carry-On Bag For American & United Approved Airlines
Hardside 22x14x9 expandable with TSA lock, USB-C port and silent spinner wheels.

Flight Knight 24x16x10 Expandable Carry On Suitcase Hardside TSA Lock USB C Lightweight Luggage Silent Double Spinner Wheels Maximum Overhead Carry-On Bag For Virgin & South West Approved Airlines
A slightly larger 24x16x10 expandable hardside with TSA lock and USB-C port, for those wanting more space.

Flight Knight 22x18x10 Expandable Carry On Suitcase Hardside TSA Lock & USB C Port Lightweight Luggage Silent Double Spinner Wheels Maximum Spirit Overhead Carry-On Bag Approved For Many Airlines
22x18x10 expandable hardside with TSA lock and USB-C port, with double spinner wheels.
KLEARSAC Carry-On Luggage, Hard Shell ABS Suitcase with Double Spinner Wheels, Lightweight Expandable Rolling Luggage with TSA Lock, light gray-24in
ABS hard shell with double spinner wheels, TSA lock and an expandable design.
SetCoolife 3-Piece Carry-On Travel Set, 20-Inch Expandable Suitcase
A 20-inch expandable suitcase sold as a 3-piece carry-on set, good value if you want matching pieces.
ELLE Escape Expandable Carry-On Suitcase White NoSize
Polycarbonate-ABS expandable carry-on with TSA lock, laptop pocket, 8 spinner wheels and a detachable toiletry bag.
VEVOR Softside Expandable Luggage with Spinner Wheels, 20-Inch Softside Carry on Luggage, Lightweight Checked Suitcase with Expandable Zippered Pocket and TSA Lock, Blue
Softside 20-inch expandable with spinner wheels and TSA lock at a very low price.
Softside rolling bags
Flexible rolling duffels and softside cases that are easy to squeeze into tight spaces.
Isaac Mizrahi Movi 20 Inch Carry-On Softside Rolling Duffel Travel Bag with Telescopic Handle
A 20-inch softside rolling duffel with a telescopic handle, a simple choice for carry-on trips.
Isaac Mizrahi Onyx 22 Inch Carry-On Travel Softside Rolling Duffel Bag with Telescopic Handle
A 22-inch rolling duffel with a telescopic handle, roomy enough for weekend trips.