These days in commercial aviation, airlines are finding ways to operate more efficiently amid the toughest sector conditions since the first oil shock in 1973-74.

And while there's no love lost between passengers and the major carriers' unconventional way of increasing total consumer flying costs by adding separate baggage fees, there's one a-la-carte fee the public may be willing to pay for: a fee for internet access on airplanes.

Delta Air Lines (NYSE: DAL) announced it will start offering broadband internet service on domestic flights as early as October, The Washington Post reported Wednesday. Other airlines, including Continental (NYSE: CAL), Southwest (NYSE: LUV), and Virgin America are planning or testing internet services. (Delta will merge with Northwest Airlines (NYSE: NWA), pending U.S. Justice Department approval.)

Analysts generally credit JetBlue (NASDAQ: JBLU) with raising coach class amenity standards for flights in the United States when it introduced satellite TV and other services on its flights.

Delta's service will cost a $9.95 flat fee for flights lasting three hours or less and $12.95 for flights longer than three hours.

Public seen receptive to Wi-Fi fee

Stock analyst and frequent flier C. Leonard Bauer says Internet fees would be "a lucrative revenue stream" for the airlines, and ironically one that will probably be popular with the public.

Delta Air Lines and Northwest Airlines may reach a merger agreement within weeks after sharing details of the plan with pilot unions, people close to the talks said, Bloomberg News reported Monday.

An announcement of the merger may come within weeks, Bloomberg News reported.

The merger would create the world's biggest airline in terms of traffic, Delta served about 74 million passengers in 2007; Northwest, about 56 million. The combined entity would vault past no. 1 carrier American Airlines (NYSE: AMR), which served 129.5 million passengers.

Delta's (NYSE: DAL) shares were down 23 cents to $19.95, while Northwest (NYSE: NWS) declined 23 cents to $20.62 in Monday afternoon trading.

Analyst C. Leonard Bauer told BloggingStocks Monday a Delta / Northwest represents a good operational fit, for several reasons.