Question : How long do most people stay in Grand Rapids when they fly in from Middletown?
Answer : Of course you're not most people, but if you were, you'd stay roughly two days.
Question : Will you do what it takes to get the absolute cheapest flight?
Answer : Sunday is your lowest-cost day to fly in February. Flexibility is paramount when booking travel plans in order to keep costs down.
Question : How often are prices changing for this route?
Answer : Flight prices for MDT to GRR change much more than the majority of routes. However, the sooner you book, the better price you tend to get.