European stock exchanges closed lower, with the London FTSE 100 index losing 0.26% to close at 6,590 points. Trading was affected by security worries after the failed bomb attacks across Britain.
BA was down almost 1.5% at 413p, shaken by the failed car bomb attack on Glasgow Airport.
In Paris, the CAC 40 lost 0.46% to finish at 6,027 points, while in Frankfurt the DAX dropped 0.61% to end the day at 7,958.
But the Dublin market was ahead, after building materials group CRH signalled a 25% increase in first-half pre-tax profits. Its shares gained 42 cent to €37.05, helping the ISEQ up 18 points to 9,325.
Wall Street share prices galloped higher, as sentiment was boosted by a flurry of news on corporate dealmaking and a robust report on the US factory sector.
The Dow Jones Industrial Average had jumped 0.78% to 13,494 and the Nasdaq composite climbed 0.86% to 2,626.
Among other deals being watched, AT&T announced late Friday it was buying mobile telecom firm Dobson Communications for $2.8 billion. AT&T shares dipped 12 cents to $41.38.
In Asia, Tokyo's Nikkei index closed up marginally to 18,146 after a central bank survey showed business confidence holding steady at close to a two-year high. The Hong Kong market was closed.
