However, in the longer term, the agreement should increase transatlantic traffic and could cut fares by as much as 15%.

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An agreement with the National Air Traffic Controllers Association, which represents the federally employed controllers, mandates a one-year negotiation period, whereas there is no such restriction for subcontractors.

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The Giants and Jets have been negotiating with the developers for months over a parking and traffic plan but haven't reached an agreement, said Karen Kessler, a spokeswoman for the teams.

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Also, the slew of customer benefits introduced under the agreement should help Delta attract higher passenger traffic.

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Eight are formally blocked because Turkey has not kept an agreement to open its ports and airports to traffic from Cyprus, an EU member since 2004 (Turkey does not recognise the Greek-Cypriot republic and insists that Turkish north Cyprus is being unfairly blockaded).

ECONOMIST: Charlemagne