Right now, there’s another deal to Europe on American.
You can fly to Luxembourg from Boston or Chicago for around $480.
Valid for travel on the outbound from mid January, 2017 – March, 2017. A 7 day minimum stay is required. Availability is limited. Must purchase at least 90 days in advance of departure
I subscribe to the Flight Deals tweets and check them pretty often.
I can jump on fares when there’s still lots of availability and I don’t miss out on the deals I want to take advantage of.
I’ve shared my process of “subscribing” to great fares.
This process involves signing up for twitter. Even if you won’t be an active user of twitter, it’s a good idea to have an account to take advantage of deals on contests in general.
I recommend following them even if you aren’t in those areas because they are gateway cities. There’s a lot of good international deals–worth the effort flying out to the gateway.