unless your schedule is extreme flexible (or you are an SE as mendy7511 says) you won't be able to redeem for flights, i also doubt you will be able to find 5 tickets for the same flight

given that when redeeming you only save the base fare of a ticket, you don't stand to gain much unless you redeem for a business or first class ticket, cut your losses and go with another card that gives you flexibility

for the points you've already earned you can redeem a short haul flight to the US