Britain's top share index fell on Wednesday, extending the previous session's losses, according to Reuters.
Airlines suffered steep falls, with budget airline easyJet off 7 percent, while British Airways parent IAG dropped 4 percent, as traders cited a read-across from Ryanair's weak update.
Shares in the Irish group, which said it could miss its full-year profit forecast, sank 14 percent.
A fall in the value of stocks trading without the attraction of their latest dividend, including Resolution, TUI Travel, and BHP Billiton, weighed on the index to the tune of 4.23 points on Wednesday.
The FTSE 100 was down 17.79 points, or 0.3 percent, at 6,450.62 points by 0735 GMT, having dropped 0.6 percent on Tuesday against a backdrop of investor concern over Syria.