"It was another jittery day for stock markets. Investors have been juggling multiple sets of corporate results while staying mindful of global geopolitics. That makes a strong directional move difficult," said Jasper Lawler of London Capital Group.
After starting the session on a weaker footing as a result of the strong pound, London's benchmark FTSE 100 index ended the day tentatively in positive territory. Frankfurt's DAX 30 index also crept higher, while the Paris CAC 40 added more than 1.5 percent.
"The risks surrounding the first round of France's presidential election this Sunday have been keeping investors cautious," said LCG's Lawler.
The French CAC index made the strongest gains, led by banks BNP Paribas and Societe Generale.
In Germany, carmaker BMW beat profit expectations with double-digit sales growth and 27-percent rise in pre-tax profits.
In London, "a mixed bag of corporate results kept the FTSE 100 near breakeven and still in negative territory for the year after its snap-election slump," the expert continued.
Accendo Markets analyst Mike van Dulken said that the FTSE was "underperforming" as a result of the falling oil price and the unwelcome strength of the pound.
Eyes were also on the first round vote in the French presidential elections this weekend, with a four-way race making it tough to call who will go into the run-off.
There are fears a win for far-right leader Marine Le Pen, riding a wave of populism, could see the collapse of the eurozone after she said she would withdraw France from the currency bloc.
"World stock markets may be rangebound ahead of the first round of the French presidential election on Sunday, but the euro has hit a three-week high against the US dollar," said Joshua Mahony at IG trading group.
- 'Geopolitical angst' -
Markets have been rattled in recent weeks by a series of events that upended the optimism that welcomed in the year.
Trump's failure to push through key healthcare reforms last month dealt a huge blow to his chances of passing the tax-cutting, big-spending plan that had helped fan a global rally since his election win in November.
That was followed by a US missile strike on Syria -- which hit US-Russian relations -- and the ongoing sabre-rattling by North Korea that has fuelled worries about nuclear conflict.
An uninspiring Federal Reserve report Wednesday on the US economy also failed to provide any lift.
"Geopolitical angst, a faltering US economy and the UK snap election are consuming investors mindsets," said Stephen Innes, senior trader at Oanda trading group.
New York - Dow: UP 0.6 percent at 20,519.59 points
London - FTSE 100: UP 0.06 percent at 7,118.54 (close)
Frankfurt - DAX 30: UP 0.09 percent at 12,027.32 (close)
Paris - CAC 40: UP 1.5 percent at 5,077.91 (close)
EURO STOXX 50: UP 0.6 percent at 3,440.03 (close)
Tokyo - Nikkei 225: FLAT at 18,430.49 (close)
Hong Kong - Hang Seng: UP 1.0 percent at 24,056.98 (close)
Shanghai - Composite: FLAT at 3,172.10 (close)
Euro/dollar: UP at $1.0771 from $1.0765
Pound/dollar: UP at $1.2837 from $1.2808
Euro/pound: DOWN at 83.87 pence from 84.06 pence
Dollar/yen: UP at 109.23 yen from 109.06 yen
Oil - West Texas Intermediate: UP five cents at $50.90 per barrel
Oil - Brent North Sea: UP two cents at $52.95