Noun. 1. interleukin-any of several lymphokines that promote macrophages and killer T cells and B cells and other components of the immune system. lymphokine-a cytokine secreted by helper T cells in response to stimulation by antigens and that acts on other cells of the immune system (as by activating macrophages).
Now, passengers must pay a flat fee of $5.60 in each direction, no matter how many plane transfers are made to get from one city to another. For passengers flying a nonstop round trip, that means the fee will increase from $5 to $11.20.Passengers flying round-trip with a connection each way will see their fees increase $1.20 to $11.20 per round trip, versus $10 before the fee increase.ost of the new revenue will go to pay down the federal deficit. Until Monday, a passenger was charged $2.50 for each leg of a journey. For a nonstop round trip, the cost was $5. For a round trip with a connection each way, the cost was $10. The fee was capped at two flights each way.
As noted above, the TSA aviation-passenger security fee has not increased since it was instituted in 2001. The House-passed budget resolution proposed to change the aviation-passenger-security-fee structure, beginning in 2015, to a simple one-way-trip maximum of $5.00âregardless of the number of enplanements.t would also eliminate the ASIF fee charged to air carriers. The higher passenger fee collections would allow TSA to ultimately offset about 43 percent of aviation-security costs. [1] Air carriers are charged an Aviation Security Infrastructure Fee (ASIF), which accounts for about 20 percent of total fees collected.