Located about 10 miles from downtown Minneapolis and downtown St. Paul, the Minneapolis-St. Paul International Airport (MSP) is the busiest airport in the Upper Midwest. A joint public-military airport, in 2014 its passenger traffic topped 35 million. The airport, which has four runways and two terminals, serves as a hub for Delta Air Lines and Sun Country Airlines. Passengers can fly non-stop on 14 airlines to destinations in the United States, Canada, Mexico, Central America, the Caribbean and Europe. Airport amenities and passenger services include many dining and shopping options, luggage storage lockers, an airport walking path, a conference center, a business center, ATMs, currency exchanges, free WIFI internet, charging stations and a children's area.