If you happen to be at Terminal C [US Airways] the CIBO Express shop near the foodcourt has lots of kosher salads and sandwiches - all around $8 or $9 or less and very tasty and fresh- tuna salad, chicken salad etc. Star-K supervision. They also have some vegan thai dishes with K-
Parve designation. The salad comes in a round container and the tuna is kept in a separate container within so that if you are vegetarian you could get this and toss the tuna without fear that the tuna came in contact with the salad [which was delicious]. For some reason the kosher options are not highlighted so you have to look for it but apparently it has a green rather than blue label. Now if only the other terminals at LGuardia would have kosher options too.