A different approach for high altitude ballooning, especially used for long duration flights is the superpressure balloon.

Triazolam is frequently prescribed as a sleep aid for passengers travelling on short to medium duration flights.

During her long duration flight Williams spent 194 days, 18 hours, 58 minutes in space.

It was always planned to be a long duration flight, investigating the effects of fourteen days in space on the human body.

Chinooks have been soared power-off for long duration flights.

Long duration flights to the International Space Station are broken into expeditions.

Their primary application is for extremely long duration flights.

In August 1922 the Daily Mail newspaper offered a £1,000 prize for the longest duration flight by an unpowered, heavier than air aircraft.

Several long glides were carried out, unfortunately some long duration flights, which could have taken the first prize, were shortened due to Martens circling.

On long duration flights, mission planners schedule off duty time for each crew member to keep them well rested throughout the flight.