KLM and Delta are codeshare partners so they share planes. I have booked with Delta this year, but some of my flight is KLM.
Both have been good in the past, I would go with the cheapest as you don't really get "horrific" scheduled flights to the USA (unless of course the DIS can tell me otherwise), as the competition keeps the standard up.
It's a shame, but KLM isn't what it used to be anymore by far. Hasn't been for years either. I'm Dutch myself, but we never ever fly KLM for any destination if we can help it. They simply do not compare to their competitors anymore. Too cramped, service not up to par, pricing tends to be in the higher half of prices, not so great FF-program, etc.
Horrific of course depends on what an individual is looking for.
I've got some standards that deviate from the 'average', which leads me to find some airlines to be pure Hellish Airways -and that's being nice-. Others will find those airlines to be fine for their family. It's all in wishes, desires, wants and needs. Having said that, AA and in a lesser form USA are amongst the airlines that have many frequent flyers saying "if I can, I'll avoid".
Delta took a bit of a hit since their merger with NWA, which apparently showed in service. Having said that, have been hearing many sounds of it going better.
UA; loved amongst many EU tourists. Does have a fair amount of complaints filled though. But then again, it is the US.
CO; good rep, allthough getting a fair amount of beating by elites since recent changes made in the process of their merger with UA. Once the merger will be a fact, it is feared their service will take a bit of a beating.
If you're an 'average' tourist, haven't got any special wishes, desires, needs, whatever? Not even close to likely to fly the airline more often and thus build a ff-status with them? With the options you've posted, I'ld say Delta, after first checking out that Delta is carrying out the flight not KLM (very easily done, will be shown on the website. If it's a Delta flightnumber, they will specifically tell you if KLM is carrying out the flight and vice versa. Flightnumber and actual airline flying are the same? Nothing will be said).
! Thanks!
