NYC/Belgium in May and have seen similar prices. What time of the year are you flying?

However, we both missed out on a pretty wicked Delta sale about two months ago. RT DC/Paris flights for about $550. Haven't seen those kinds of prices in forever.

I don't know what I was thinking not grabbing that.

Edit: I see your flight is direct. I'd do it.

Not sure if this helps, but it seems these random flash deals have been popping up frequently as of late. I've given myself until mid-March to wait and see what comes up before I pull the trigger.