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.
Airfare varies significantly depending on destination. U.S. destinations typically run $300 to $750 per person if you purchase the air add-on from the cruise line. Europe or Asia can be as high as $1000 to $1600 per person.The price usually includes transfers between the airport and the ship.laska Europe Caribbean Cruise length 7-nights 12-nights 7-nights Number passengers 2 2 2 Cruise portion $1000 pp $2000 PP $800 PP Airfare from Dallas $600 PP $1300 PP $300 PP Total cost per person $1600 PP $3300 PP $1100 PP Total Cost $3200 $6600 $2200.