The budget carrier said the decision, which will see the fees rise from an average of £47 per flight to £64 per flight over the period to 2027, an increase of around 43p per passenger, would tacitly reward Nats for its failure.
Tim Alderslade, chief executive of Airlines UK, the trade body representing UK registered airlines, described the decision as "another kick in the teeth for passengers" whom he said would "inevitably end up footing the bill of millions of pounds".