Fool's Gold is an adventure/romance film that should be released in February 2008. The film was directed by Andy Tennant and is starring Matthew McConaughey and Kate Hudson.
Here the trailer:
"A new clue to the whereabouts of a lost treasure rekindles a married couple's sense of adventure -- and their estranged romance." (Source: Wikipedia)
This kind of movie isn't exactly my cup of tea, but it may be entertaining during a long flight