Complex sentence: Ljubljana airport is by far the busiest airport in the country with connections to all major European destinations more than 1,5 million passengers pass through per annum and 22,000 tonnes of cargo is carried per year.
Split into simpler sentences: Ljubljana airport is by far the busiest airport in the country with connections to many major European destinations. More than 1,5 million passengers pass through per annum and 22,000 tonnes of cargo is moved per year.