Ryanair has today announced the cancellation of all Spanish domestic flights and most international flights to/from Spain which were due to operate tomorrow.
The budget airline has blamed what it calls "the failure of the Spanish government to ensure minimum service guarantees for non-Spanish airlines’ flights".
Ryanair is now emailing passengers affected by the strikes and will publish a full list of flight cancelations on its website as soon as possible.
Ryanair had hoped to operate 'hand-baggage only' flights.
"Ryanair apologises to passengers for any inconvenience caused and reiterates its calls for action from the EU to prevent strikes on essential services such as ATC and related travel services," said a company statement.