Seattle to Billund, Denmark from $451RT (SUMMER)
Great fare on Delta and KLM from Seattle to Billund, Denmark (the home of LEGOLAND RESORT!). Denmark is centrally located between Sweden and Germany so trips to either would be easy using Billund as a base and exploring Western Europe. Cheapest dates in September and October but there is wide availability in August for only a few dollars more! Use ITA Matrix Software to find the cheapest dates. Book through Momondo for the frugal fares!