4. Portland, OR
Flight costs: $170
Attractions: Portland Rose Festival, World Naked Bike Ride, Oregon Zoo Summer Concerts, lots of beer festivals
If you love festivals, you will fall in love with Portland that ranks 4th in our list of best places to visit in USA in June in an instant. They host some of the biggest festivals in summer, including what they refer to as the granddaddy of all these fests, The Portland Rose Festival. They also have free summer concerts, the festival of the arts, and even Vegan Food and Beer Festival.