Air freight is better placed to avoid congestion during the coming months than sea freight, but airports have expressed concern that labour shortages could slow down handling.

"Shippers are turning to air freight because of the challenges at sea," explained Michael Steen, CCO of Atlas Air, "it is compounding the high demand already there.

"It's going to be strong for all modes, and we are definitely seeing some challenges, such as at Chicago O'Hare.

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