Eos was an improbably candidate for success in the airline industry. It flew one route, from New York's JFK to London. It was an all-business-class carrier.

Now, Eos is bankrupt. Having only one route, added to the rising price of jet fuel, cut the carrier down.

According to the AP, "The company, based in Purchase, N.Y., said it intended to eliminate most of its work force."

The news raises the question, once again, whether small and large airlines alike can make it though the current increase in fuel prices and a recession without having to file for Chapter 11. It was only four years ago that most U.S. carriers had to seek protection in the courts. AMR (NYSE: AMR) was one exception. That hurts it now because it did not use bankruptcy to cut its debt and the costs of its workforce. That may make it the most likely candidate of any American carrier to hit the air pocket of insolvency.

The oil price crisis my be so bad that, coupled with falling passenger revenue in a sharp and prolonged downturn, even mergers like the one planned by Delta (NYSE: DAL) and Northwest (NYSE: NWA) will not save them.

That will leave the banks, who hold most of the debt on airline balance sheets, holding the bag.

Douglas A. McIntyre is an editor at 247wallst.com.