At 0820 GMT, the euro zone benchmark was up 0.4 percent with most European bourses and sectors trading in positive territory.

"News overnight of a late agreement between the US and Canada to salvage the NAFTA trade agreement should give a boost to global risk appetite at the start of the fourth quarter," wrote Peel Hunt strategist Ian Williams, adding the deal "may offer encouragement that the other global trade disputes can settled satisfactorily."

Ryanair was the worst performer, down 7.5 percent after it cut its forecast for full-year profit and said there could be worse to come if recent coordinated strikes across Europe continue to hit traffic and bookings.

The low-cost carrier's fall weighed on the wider sector which was one of the only ones in the red, down 0.6 percent.

Peer Easyjet, Air France-KLM and BA owner IAG were down 4.1 percent, 2.6 percent and 1.4 percent respectively.

Germany's Linde posted the highest rise, climbing 6.3 percent after it received approval for its proposed $83 billion merger with Praxair PX.N from the Chinese antitrust authorities.

French supermarket group Casino was up 0.3 percent after it said it had agreed to sell some property assets for 565 million euros ($655 million) to reduce debt levels that have worried investors.

Italian banks were up 0.5 percent after suffering their worst fall in about two years on Friday on fears the populist government's decision to increase its deficit target could threaten the long-term sustainability of its sovereign debt.

On Sunday, Italian daily La Repubblica reported that the European Commission was set to reject Italy's budget plans in November and open a procedure against the country's public accounts.

The Milan bourse was up 1 percent, making it the best performer among European trading centers, as it rebounded from a 3.7 percent drop on Friday.