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.
Alaska isn't the only airline to increase its ticket change fees. American Airlines, Delta, United Airlines and US Airways all changed their fees to from $150 to $200 on domestic flights in May.The airline expects the fee increase to bring in $50 million in added revenue.Photo: Reuters). Flying on Alaska Airlines is going to get more expensive as the airline is raising its fee for checking a suitcase to $25 to keep up with most airline's fees. Anyone who purchases tickets on or after Oct. 30 will have to pay $25 for the first and second checked bags for each passengers.