I am looking to purchase a round trip business fare from EWR to CDG departing 5/26 and returning 5/30. The system is only letting me purchase really expensive D fares ($10k and change) and I can't figure out why. On both flights, lower fare buckets are available and the outbound even has PN3 (UA54). Can anyone help me understand why I'm only being shown a D fare? I've purchased this route many times and I've never paid more than $8k. It's boggling my mind and assume someone smart here can explain