Hope everyone is having a great afternoon! I like to travel to Europe about once a year during the off-season (I'm not a fan of huge crowds). I used to travel a lot for work and generally flew American, but I don't have status any longer and I've used a fair amount of my miles so I'm not tied to them. On American, it seems they steer travelers to Europe from Dallas through London (from where you will pick up BA to transfer to wherever you are going). I know AA also flies non-stop to Paris, Madrid, and Frankfurt during the low season, but it seems more difficult to pick up one of AA's partners at those airports for the connecting flight.
Last month, I went to Venice and flew Lufthansa with a stop in Frankfurt, which worked fairly well. Earlier last year, I flew United to Lisbon with a stop in Newark, but United seems to have gone the AA route and is directing European travel through its partner Lufthansa now. Delta seems to be doing the same.
For my next trip in the winter of 2018, I'd love to go to Athens. I've done some initial searching on Google and Skyscanner, but the routes available from Dallas don't seem very accommodating. Since it's so early, I'm sure the routes aren't fully set. Regardless, if anyone has any general advice on flying to non-hub European cities from Dallas, I'd love to hear it! Thanks so much for any tips!