Hi, I'm planning on going to the US of A in the summer. I was wondering who are the cheapest to fly with (internally) in the US? My dad was saying that it is possible to turn up on the day and get into cheap 'cancellation' slots? Or something like this. Does anyone know about this? My plan is to fly to New York and take a look around, then from New York I need to get to Minneapolis. The plan is currently to fly from New York -> Chicago and then get the train / grey hound from chicago to Minneapolis. I imagine if I do it right the cost would be similar-ish to direct flights to Minneapolis but I would get to see a lot more...! Oh and I have plenty of AirMiles to spend can you use those on internal US flights? I'm planning on using these for my flight to New York at the very least. Thanks in advance for any (useful) input.