Wow... that;s absolutely shocking and terrible news Emma65. My condolences for your awful situation.
Breavement fares only apply to international itineraries and gennerally offer 75% of Y fares. Normally the market conditions offer cheaper fares but considering the time of year and busy flights, the breavement fare might work. However you will require the credit card capacity to purchase the full fare. Once the particulars are confirmed and the funeral home can contact AC and provide death certificate, the fare difference gets added back onto your card.
Other options for you to consider.
BUF is an option that brings together USA airlines (anyone at this point UA thru ORD/IAD, CO thru EWR, DL to JFK. etc.)
I can see DL two stop option (BUF-DTW-AMS-GOT and return) for $824 ai CAD leave Jan 1 return Jan 15.
There is a one stop option on DL (BUF-JFK-CPH and return) for $1000, but that only gets you to CPH.
Let the FT community know if there is anything else you need.