Travellers caught up in this week's wave of bomb threats will likely face disappointment if they pursue compensation, according to the aviation regulator.

The Civil Aviation Authority (CAA) said that bomb hoaxes would likely be classed as an “extraordinary circumstance”, meaning it is unlikely that compensation would be paid to passengers.

The disruption has hit multiple flights across Europe this week.

Two UK airports , Heathrow and Birmingham , have received bomb threats.

Flights to European cities that departed from UK airports are among those affected, including services from London Stansted, Newcastle and Glasgow .

Bomb threats have been levelled against multiple flights across Europe this week (AFP/Getty)

Several aircraft have been diverted and others were forced to make emergency landings.

The government has said it believes threats made to UK airports and flights were “malicious hoaxes”.

For those caught up in flight diversions or who have been otherwise impacted, the CAA's guidance points to…