There is no single study that compares jet fuel use for passenger flights versus air freight shipping.
FedEx CEO Fred Smith blamed the disappointing quarter on continued weakness in the air freight business.
FORBES: FedEx: Disappointing Q3 Profit Sends Another Warning About Slowing Asian Growth
This weekend, the carriage of unaccompanied air freight from Yemen on passenger and courier flights was also suspended.
Work is under way to come up with technologies to screen air freight.
Impressive growth in air freight is largely a result of growing demand for transportation for high-value and perishable consumer goods.
UPS' international air freight business continued to face pressure from customers opting for slower but cheaper delivery options, particularly in Asia.
Additional costs of rushed orders and air freight were not unheard of.
Pharmaceutical companies are heavy users of air freight, but said they had enough stocks to avoid any problems in the short term.
BBC: An empty checkout desk at Belfast International airport
FedEx Express reported a sharp 13% decline in international priority freight revenues, while international air freight revenues fell by 17% year-on-year during the third quarter.
That has blurred the line between express services and air freight, and led to increasing use by integrators of spare hold capacity on passenger planes.
It hopes that companies will be attracted to a service that offers seven-day, door-to-door delivery for half the price of air freight delivery of four to six days.
"We're probably the only people in the world selling socks brought in by air freight, " says Sunakoshi Yukio, spokesman for Wix, the Japanese distributor for the New York-based manufacturers.
It already handles the second largest amount of air freight in the UK and the opportunity of adding rail to it will be of huge strategic advantage for the region.
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And Stalk points out that air freight, thought to save the day for lightweight or high-value goods, is facing its own overload from unbuilt runways and a scarcity of planes.
The growth of air freight over the past 20 years has provided an extra boost for Boeing and Airbus, which both registered record-breaking orders of over 1, 000 aircraft a piece last year.
The 8, 600-employee sorting center in Louisville, UPS' largest for air freight, processes 304, 000 packages an hour but could be modified to handle 500, 000 if UPS could get the planes in and out faster.
Air freight offers speed for the 40% of the world's trade (by value) that travels in cargo flights or in the hold of passenger aircraft, but it costs ten times more than sea transport.
Pilot Air Freight, the company which carried the unusual cargo, pointed out that, apart from anything else, Mr McKinley had narrowly escaped death by having the good fortune to fly in pressurised, heated cabins.
However, heavier, less urgent and low value per pound shipments will increasingly shift towards the sea route as companies thrive to manage their total distribution costs efficiently, which would limit the growth in air freight segment.
Even if American freight carriers were to copy El Al, Israel's airline, and hold goods for a day for security checks, it would not greatly erode the advantages of air freight over other means of transport.
Overall, the air freight pounds are expected to grow at a modest 2-3% annual rate as the integration of world economies over time will increasingly drive movement of small shipments directly from the point of production to the consumer.
After "eruptive activity" last year at the Cleveland volcano, University of Alaska Fairbanks scientist Steve McNutt noted that 90% of air freight from Asia to Europe and North America flies over Alaska airspace, and hundreds of flights fly through Anchorage's air space daily.
These are the impediments to the movement of people and goods brought on by Sept. 11: the wasted hours of employees showing IDs to get into their building, the delays at the airport, the backlog of trucks at the border, the increased cost of air freight, the dead weight of higher insurance premiums.
These are the impediments to the movement of people and goods brought on by Sept. 11: the wasted hours of employees showing proof of identification to get in their building, the delays at the airport, the backlog of trucks at the border, the increased cost of air freight, the dead weight of higher insurance premiums.
The county won control of the air-freight park and may be able to reuse it.
And consumer tastes for out-of-season vegetables, exotic fish and fresh flowers have also added to the demand for air-freight services.
The pesticide-free cooking roses used by most American chefs come from organic gardeners in California who air-freight them to specialty food suppliers around the country.
First off, AppleInsider is reporting that some supa' secret shipments are about to make their way via air-freight from the Far East to the United States around the 5th of September.
ENGADGET: Scraping the bottom of the endless Apple rumor barrel
In the British Airways lawsuits, lawyers representing a pair of flower importers tried to enlarge the class to include hundreds of additional plaintiffs who supposedly lost money due to the air-freight cartel.
Some purchased air-freight services at inflated prices directly.
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