By Michael Tedder Airline passenger group is pushing the Federal Aviation Administration to act. Traveling by airplane is worse than ever. Thanks to a combination of labor shortages, covid infections and erratic weather, flight cancellations are so common that you can basically flip a coin to see if your flight still happens (though at least Southwest (LUV) – Get Southwest Airlines Company Report has now announced its flight credits will no longer expire.) Luggage is getting lost, people are fighting on planes and prices for airlines such as Delta (DAL) – Get Delta Air Lines Inc. Report and Sp…