Ryanair's "Priority & 2 Cabin Bags" is a paid upgrade that changes both your boarding experience and your luggage allowance. If you purchase Priority, you are allowed to bring two bags on board: a small personal bag (40x20x25cm) that fits under the seat in front of you, and a 10kg wheelie bag (55x40x20cm) that goes in the overhead locker. Non-priority passengers are strictly limited to just the small personal bag and must pay extra to check in a 10kg bag. Beyond the extra bag, Priority gives you access to a separate, faster queue at the boarding gate, allowing you to get on the plane first and secure overhead space near your seat. In 2026, Ryanair often limits the number of Priority slots per flight (usually to about 90 per plane) to ensure there is actually enough locker space for everyone who paid for it. If Priority is "sold out," you can still buy a 10kg bag, but you will be forced to drop it off at the check-in desk as hold luggage and board in the standard queue. It is generally considered the most cost-effective way to travel with a carry-on suitcase on the airline.