Round trip nonstop IAD to AMS. 10 days, the least expensive itinerary as shorter trips priced higher, with the ultimate goal of seeing at least one David Gilmour concert.
I started my pricing on April 20.
KLM (Delta ) and United (Lufthansa) prices were always identical.
4/20, 147 days out = $1262
4/30, 137 days out = $1262
5/8, 129 days out = $1230
6/11, 95 days out = $1203
7/2, 73 days out = $1088
Today Lufthansa is a little less, $1083 through a 3rd party vendor.
About the price I paid 3(?) years ago...