Hello everyone, first time posting here after several years of reading. I have similar concerns when looking at December/January travel to the UK. Those saver J fares EWR>LHR caught my eye, with an EDI>EWR return in Y. The flexibility with redeposit fees waived is why I'm planning to use miles over a cash ticket. Should I be concerned about the viability of the EDI>EWR nonstop, even when traveling during the normally busy time around Christmas and New Years?