Worries over Greece's future in the euro zone kept shares under pressure on Monday, even as fresh multi-year lows for the euro and crude oil gave a boost to travel and consumer-goods stocks.
The pan-European FTSEurofirst 300 index was down 0.1 percent at 0909 GMT, with benchmark indexes in London and Frankfurt also in negative territory. The Paris CAC 40 stayed flat.
Airberlin, Germany's second largest airline, and Bulgaria Air will launch codeshare flights on some European routes from January 14 next year, austrianaviation.net has reported.
Under the codeshare agreement, airberlin will apply its AB airline code on Bulgaria Air flights from Berlin, Frankfurt and Vienna to Sofia.