The organizers of the 2028 Summer Olympics in Los Angeles have promised to have the most ambitious sports program ever and sell more tickets than any other Games.

Now they want to be even bigger.

LA28, the organizing committee, announced on Friday that the swimming competition at the 2028 Games would be held at SoFi Stadium, the home of the Rams and Chargers, the city’s two N.F.L. teams. There will be 38,000 seats for fans, double the size of typical venues used for most Olympic swimming events — which, along with gymnastics and track and field, are one of the biggest draws for the Olympics.

“To put one of those big three Olympic sports in a spectacular venue with the capacity we could have to showcase that sport was frankly just too good an opportunity,” Casey Wasserman, chairman of the organizing committee, said in an interview.

The decision to move the swimming events into the gleaming SoFi Stadium is a reflection of the economics of hosting the Olympics. Most are heavily funded by governments and inevitably incur billions in cost overruns. This year’s Games, which begin in Paris at the end of July, may break even, officials have suggested.

The Los Angeles organizers are not receiving direct public money, and instead plan to fund their $6.9 billion budget with private sources and sponsors, duplicating the structure from the last time the city hosted the Olympics in 1984. The Games that year were also funded by private sources and ended up with a profit of about $250 million.

So far, securing sponsorship for the 2028 Games has proceeded slowly, with just Comcast and Delta officially signed on as top-tier sponsors.