Don't forget to register for a travel visa, which is now required to go to the UK. Please refer to website below for more information prior to your travel. It may take up to three working days to obtain this visa, so please make sure that you obtain your visa well ahead of time.

https://uk.usembassy.gov/worldwide-travel-alert-new-entry-requirements-for-us-citizens-traveling-or-transiting-through-united-kingdom-airports-effective-january-8-2025/

Best Time to book airfare is usually 4 to 6 months prior to travel. We would recommend booking flights as soon as you know you may be attending. There are usually plenty of flights to the UK and of course we recommend flying into Edinburgh as your final destination.