EasyJet was the index's worst-performing stock in early trading, falling 2.3 per cent to 1,144p, while International Airlines Group, the parent company of British Airways, followed, falling 1.5 per cent to 419.3p.
Travel stocks were also hit, with Tui falling 0.9 per cent to 964p, while Carnival fell one per cent to 3,520p.
15 July 2016 @ 8:15ameasyJet (EZJ)
Meanwhile, the FTSE 100 was largely flat, edging down 0.01 per cent in early trading, to 6,652 points.
"After the horrific attacks in France, investors are anxious about the situation and how it will unfold," said Naeem Aslam, chief market analyst at Think Markets UK.
"Most importantly, the question is what it means for the EU and for its single market with open borders given that the UK has chosen to leave the EU.
"Events like these can cause further division among nations which may create more turmoil and uncertainty for the markets. It is certainly time for unity and only a united front can cure these events."