Most airlines are already running at or close to capacity at Thanksgiving, and have no ability to add extra flights.

The English custom of calling the second floor the first gave me an extra flight of exercise.

Occasionally, extra seasonal flights are operated to meet the demand of the fishing season.

She said the extra flights were not a response to a competitor.

Demand for the service is 25pc higher than expected and the company has bought a new aircraft which will enable it to run extra flights.

Initially the extra flights should be limited to 125,000 a year until 2020, rather than the 222,000 at full capacity.

An extra daily flight started on 10 May 2010.

But pilots, who called in sick for 10 days, said they intended to refuse extra flights.

How many people started booking extra flights when they heard about Climategate?

American's extra flights would then be cut to seven temporary flights.