Hello, I've just started collecting points and miles and things, so I still don't really have a good sense of how they can be used.

I'm looking to fly as cheaply as I can from the East Coast (Washington or New York) to Scotland (Glasgow or Edinburgh) from June 14-17.

My points/miles are not very extensive (I'm working on it!), so I'm not sure if they can be used at all, but I was hoping they might be able to be used to pay for part of the ticket? Maybe?

Delta: 57K
Mariott: 50K
AmEx Reward: 50K
US Air: 37K

If anyone has any suggestions/tips/helpful advice, I'd be very grateful! Thank you!!!