Lewis is right; at that hour it's best to brown-bag it.
(I order from my favorite deli and have them make us up some nice sandwich boxes, which we pick up en route to the airport. Nothing smelly, but we do garner very envious looks when we take them out and have our little picnic on the plane.

)
If you do get boxed dinners made up, be sure to ask them to give you the condiment packets separately, so that you can carry them through security in your 3-1-1 baggie.