( CNN ) -- London Heathrow , the world 's busiest airport in terms of international passengers , has just celebrated its busiest day ever , with 137,000 people departing from the airport on August 13 . But it 's not the only airport in the world to boast impressive numbers . Here , we 've enlisted the help of the world authority on superlative achievements -- Guinness World Records -- to compile a gallery of record-breaking airports from across the globe . Are you a window flier or aisle seater ? TSA to investigate racial profiling claims . Policy on unaccompanied kids causes flap .
A record 137,000 people departed from Heathrow on August 13 . The number of flights to and from the UK has fallen by more than a third since last year, with just over half of all passengers flying in or out of Heathrow.