EU rights around flight cancellations and delays apply based on the airline, and not the destination.
That's according to travel expert Eoghan Corry, who says it's up to the carrier - not the passenger - to get people to their final destination.
He was speaking as some SAS flights from Dublin were re-routed to London to get to places like Stockholm.
But even though the UK is now outside the European Union, passengers rights are not affected under the EU261 directive.
EU air passenger rights apply:
- If your flight is within the EU and is operated either by an EU or a non-EU airline
- If your flight arrives in the EU from outside the EU and is operated by an EU airline
- If your flight departs from the EU to a non-EU country operated by an EU or a non-EU airline
- If you have not already received benefits (compensation, re-routing, assistance from the airline) for flight related problems for this journey under the relevant law of a non-EU country
EU rules don't apply to cases of denied boarding, cancellations or delays to flights from the UK to the EU if the flight was operated by a UK carrier or another non-EU carrier.
But the rules do apply if your flight from the UK to the EU was operated by an EU carrier - unless you've already received compensation or benefits under UK law.
The EU includes all 27 EU countries as well as Guadeloupe, French Guiana, Martinique, Réunion Island, Mayotte, Saint-Martin, the Azores, Madeira and the Canary Islands.
The rules also apply to flights to and from Iceland, Norway and Switzerland - but not the Faeroe Islands.
Eoghan told Pat Kenny: "The issue is that you're departing an EU country, that's what will apply to your airline.
"The airline obligations to you as a consumer are under EU law.
"Travelling the other direction, there will be probably variations of that.
"There's quite a few noises from Britain, that EU261... they're unhappy with it.
"But your rights are not affected at all because you're flying to a non-EU country.
"It actually goes by the airline - so if you're an Irish airline, you are obliged to your consumers under EU law".