Not by accident.
People do look for official data on flights, i.e official flights and it is a catchy name.
So this domain may serve as an information website on flights or as an Airline company's official website or as some other possible aviation usage.
Related domain sales(source: namebio.com):
thailandflights.com 7,000 USD 2016-09-08 Sedo
lowpriceflights.com 4,100 USD 2007-11-06 Private
lateflights.com 4,000 USD 2010-12-08 Sedo
fastflights.com 3,988 2011-05-18 Afternic
europeanflights.com 3,450 USD 2005-01-17 SnapNames
Resell price: mid-high $xxx
End user price: low to mid $x,xxx
Best of luck