Please share some tips or info on how to get a lower price on a one-way ticket from Europe to EastCoast US or nearby May 6, 2024 or later.

We are looking at trans-atlantic cruise ending in Barcelona. Seem like price and points (DL) for OW are about the same as RT. If I have to pay RT, I'll figure another cruise to really use the flight I'll have to pay for! (But OW would be sweet.). Cruise line wants to charge $1500ish per person.

I know inter-European flights are cheap, so don't mind flying to any other city to depart Europe. And I can easily handle any Florida airports or NYC as first choices... but will take any East Coast or close city.

To be picky, if I do coach, I do like planes with a 2 seat side, not a complete killer deal, but while I'm telling you desires! ha!
Will pay "reasonable" for comfort upgrade. Would be hugely wonderful to afford business class.

Thanks for any of your thoughts! and for helping a not so savvy traveler.