Ryanair has changed its hand luggage rules from today by introducing charges for passengers flying with a small suitcase.
It said the measure is necessary to reduce delays.
In January, Ryanair began a policy which saw passengers who had not bought priority boarding permitted to take a "personal bag" - such as a handbag - on board while a second, larger bag - such as a wheelie suitcase weighing up to 10kg - could be put in the hold free of charge.
But it said this resulted in up to 120 bags being tagged at boarding gates for each flight, meaning departures were disrupted.
Ryanair has now changed its rules by no longer allowing any luggage in the hold free of charge.
Passengers have to pay €8 to check in a 10kg bag.
The previous lowest price for checked luggage was €25 for up to 20kg, which remains an option for those with heavier cases.
The maximum size of "personal bags" allowed on board has been increased by 40%.
Passengers who pay for priority boarding, which costs €6, will continue to be allowed to take both a "personal bag" and small suitcase as hand baggage. A total of 95 people can pay priority on any given flight, the airline said.
The airline said there will be a €25 fee for non-priority customers who turn up at the gate with a bag that is larger than the sizer allows. However, it said this fee will be waived for the month of November to give customers time to get used to the changes.
Ryanair believes some customers may prefer the €8 checked luggage option because they do not want to drag a wheelie case through airport security.
It claimed most passengers will be unaffected by the changes, as 30% already buy priority boarding and a further 30% travel with only a "personal bag".
A statement on the airline's website read: "Main benefits of this new policy will be reduced flight delays and cheaper checked bag option. Pack more liquids into a 10kg checked wheelie bag. Walk to the boarding gate hands free."
Ryanair insists it does not expect to make more money from the new rules, as it will lose revenue from passengers with checked bags switching from the €25 fee to the €8 option.
