I'm looking at going to Spain this November and will possibly be flying KLM from JFK on KL642 (777-200) and then onto MAD.
Coming back I have the option of flying KL643 on the 747-400 or I can spend the night at AMS and then fly out the next morning on a Northwest A330-300 to EWR.
A plus of flying out on the Northwest A330-300 is that I can spend an extra day in Madrid. A plus of flying on the 747-400 is that well, it's a 747-400!
Which would you choose?
I have flown KLM 8 times and know their service well, curious about Northwest's service.