(NEXSTAR) – Since 2006, the Super Bowl has been held in one of 14 cities. Five of those cities have hosted more than once. That list will grow to seven after the 2027 and 2028 Super Bowls. Meanwhile, there are 15 cities that have an NFL team and haven’t hosted the Super Bowl — ever. What keeps the NFL going back to the same cities, season after season? The selection process starts years in advance, NFL’s Vice President of Events Strategy Matt Shapiro previously told Axios. NFL ownership votes on recommendations, and if an agreement is reached, the location is announced. Shapiro said the weather, stadium quality, and the mix of hotels and nearby venues are the main factors for selecting a city, as well as how long it has been since they hosted a Super Bowl. Local partnerships and support are also considered. Cities were, until 2018, allowed to submit bids to earn the right to host the Super Bowl. Now, the NFL approaches cities that fit the needs, according to Sports Illustrated. The Minnesota Star Tribune obtained a document the league gave Minneapolis, outlining the minimum requirements of a Super Bowl host city. That included having a stadium that can seat at least 70,000 and, "if the historical average daily temperature over a 10-year period in the Host Community on the week of the Game is below 50 degrees," a domed stadium. That guidance was from 2014, but it would eliminate 17 current stadiums based on size, and another eight based on weather. Those last eight — stadiums that are home to the Carolina Panthers, the Green Bay Packers, the New York Giants and Jets, the Washington Commanders, the Kansas City Chiefs, the Denver Broncos, the Buffalo Bills, and the Baltimore Ravens — could have qualified if only they had a domed stadium. (MetLife Stadium, home to the Jets and the Giants, did host the Super Bowl in 2014.) The Chiefs’ new stadium is, however, expected to have a fixed-roof, which could improve the chances of a future Super Bowl being hosted in Kansas. So, too, could the new stadiums for the Commanders and the Cleveland Browns. The Tennessee Titans are also expected to play in a new stadium with a roof next year; however, it will only have about 60,000 seats — 10,000 fewer than the minimum. Denver is in a similar spot, though the city said last year that it hopes its new stadium will open the doors to a Super Bowl-hosting opportunity. While the guidance is more than a decade old, the NFL appears to continue to adhere to it. Since 2006, 14 cities have seen their stadiums host a Super Bowl: With the exception of East Rutherford, these stadiums are either in warm-weather climates or have a closed roof. The next two Super Bowls will return to Inglewood and Atlanta, respectively. Meanwhile, cities that have yet to host a Super Bowl despite having a team include: There's more to it than having fair weather and an appropriately-sized stadium, too. The aforementioned guidance said cities must also have room for the “NFL Experience” interactive, practice areas that give each team equal space, and enough hotels within close proximity to serve attendees.