PARIS – Boeing has landed a string of new plane deals while Airbus has won lucrative promises at the Paris Air Show, as both plane makers stressed the growing importance of digital technology in aviation.

Boeing announced firm orders Tuesday for more than 45 planes worth $5.4 billion at list prices, though customers routinely negotiate discounts. Buyers included Ryanair, China’s Okay Airways and the Aviation Capital Group leasing company.

The aerospace giant also took in tentative orders for a further 83 planes worth as much as $9.3 billion.

In addition, Boeing raised its forecast for new airplane demand, projecting the need for 41,030 new airplanes over the next 20 years valued at $6.1 trillion.

The company’s annual market outlook was released today at the air show, with total airplane demand rising 3.6 percent over last year’s forecast.

“Passenger traffic has been very strong so far this year, and we expect to see it grow 4.7 percent each year over the next two decades,” said Randy Tinseth, vice president of Marketing, Boeing Commercial Airplanes. “The market is especially hungry for single-aisle airplanes as more people start traveling by air.”

The single-aisle segment will see the most growth over the forecast, fueled by low-cost carriers and emerging markets. Some 29,530 new airplanes will be needed in this segment, an increase of almost 5 percent over last year.

Airbus said it had pledges Tuesday for 95 jets worth up to $10.4 billion at list prices.

Most of the orders were for single-aisle jets.

Airbus launched a new digital platform and Boeing forecast big growth in demand for technology and data to guide aviation industry decisions.

High-tech hardware is getting attention at this year’s Paris Air Show.