best board games for 2 persons on vacation/travel by airplane

http://www.reddit.com/r/boardgames/comments/uka0zx/best_board_games_for_2_persons_on_vacationtravel/

As the title suggests, what are some board games you would recommend for a couple going on vacation - we especially need some games for a 18 hour airplane travel.. but also to play at the beach, hotel room at night, etc.

I am already bringing 7 wonders duel, hive, jaipur, sprawlopolis, maybe wingspan - but I am open for other suggestions