Air Canada and United both have great fares to Barcelona, Spain. They start at $447 and you can fly out of Dallas or Phoenix.
Valid for travel on the outbound from November – early December or January, 2018 – March, 2018. A 7 day minimum stay is required. Availability is limited. Must purchase at least 28 days in advance of departure for mid $400s
In addition, there’s a fare for $464 out of Philadelphia on Delta.
Valid for travel on the outbound from late August – October. A 7 day minimum stay is required. Availability is limited. Must purchase at least 28 days in advance of departure
I subscribe to the Flight Deals tweets and check them pretty often. I may have booked deals during work meetings. (If my boss is reading this, disregard the last sentence).
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.