Complex sentence: The airline was established as "Helios Airways" on 23 September 1998 as the first independent privately-owned airline in Cyprus and on 15 May 2000 operated its first charter flight to London Gatwick.
Split into simpler sentences: The airline was established as "Helios Airways" on 23 September 1998 and was the first independent privately owned airline in Cyprus. On 15 May 2000, it operated its first charter flight to London Gatwick.