Airlines are doing everything they can to earn some extra revenue through upgrades and charges for things that used to be included in the cost of a seat. Flyers pay more for a guaranteed aisle seat, better food, access to a lounge and even baggage.

But those middlemen who sell tickets don’t always push the extras like the airlines themselves. So carriers are pushing back against the booking companies that dominate the industry. In the age of the World Wide Web, they argue there’s no need for them.

They want to cut out the global booking systems that one aviation expert calls the “leeches” of the industry. The Associated Press reports the outcome could mean the difference in profitability for some carriers.

Airline profits are predicted at $3 billion this year on revenues of $631 billion. That razor-thin margin of profitability could be increased if airlines didn’t deal with Sabre, Travelport and Amadeus.

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