The Delta Air Lines : Paris-to-Pittsburgh nonstop flight will return beginning March 24.The flight, which was suspended in the fall, has been a jewel in the cap of Pittsburgh International Airport  for its two years of operation. There will be four roundtrip flights from March 24 through the end of May. In June, the flights will go to five times weekly through the summer, then back to four times a week for the fall before suspension again near the end of October.

Delta Air Lines Flight 631 will leave Pittsburgh International Airport at 6:20 p.m. and is scheduled to arrive at Charles de Gaulle International Airport at 8:20 Paris Time. The return flight, Delta Air Lines Flight 632, leaves Paris at 11:10 a.m. and is scheduled to land at 2:15 p.m. in Pittsburgh.Pittsburgh International Airport and the Allegheny County Airport Authority are already starting to market the flights to help increase bookings. This is the first year that there will be no state or corporate funding to help support the Paris-to-Pittsburgh flight if it does not have enough passengers. A revenue sharing agreement between Delta Air Lines (NYSE: DAL) and the Allegheny Conference on Community Development expired in 2011.If the flight is going to succeed this year, it has to do it on its own merit,said Pittsburgh International Airport spokeswoman JoAnn Jenny. “We’re trying to do whatever we can.