Kelly Chang, TripMatters How do you plan a trip to Europe? Lock your travel window first, pick two or three anchor cities second, then book long-haul air 3 to 6 months out and build hotels, trains, and tours around that flight. Air availability is the real constraint, so everything else should bend to it. TripMatters, a VIRTUOSO travel agency in Tustin, California, plans every Europe trip in that order, and it is the single biggest reason our clients are not scrambling in mon