"The whole world should be able to dream of a World Cup, not just Europe and South America," Infantino said in an interview with Swiss media, as quoted by Poland's PAP news agency.
This year's World Cup in North America featured 48 teams for the first time, up from the 32-team format used from 1998 through 2022.
The expansion increased the number of matches from 64 to 104, and Infantino told Swiss media he viewed the change as a success and would not rule out a further increase, the Polish state news agency reported.
He said the standard of play had remained high despite the larger field and argued that expanding the tournament gives smaller football nations greater opportunities while helping the sport grow worldwide.
The 2030 World Cup, to be hosted by Spain, Portugal and Morocco, with opening matches in Uruguay, Argentina and Paraguay, is currently scheduled to feature 48 teams.
Saudi Arabia is set to host the 2034 tournament, also under the 48-team format.
However, FIFA could still decide to expand both tournaments to 64 teams, according to reports.
South American football governing body CONMEBOL has been among the strongest advocates of further expansion. Its head Alejandro Dominguez renewed the proposal after this year's tournament, saying the centenary World Cup in 2030 would be an appropriate occasion for a 64-team competition, according to the PAP news agency.
Such a move would significantly increase the number of qualifying places. Oceania could receive two berths instead of one, Africa 13 instead of nine, and Asia 12 instead of eight.
Africa benefited markedly from the expansion to 48 teams. Eight of its nine representatives reached the round of 32 at this year's World Cup, easing fears that a larger tournament would lead to too many one-sided matches.
Germany's 7-1 victory over Curaçao was among the few lopsided results, while most games remained competitive.
The expanded field also produced several surprise performances. Cape Verde went unbeaten in the group stage before pushing Argentina to extra time, with 40-year-old goalkeeper Vozinha helping secure a scoreless draw against Spain.
The Democratic Republic of the Congo also advanced after a 3-1 victory over Uzbekistan.
A 64-team tournament would increase the number of matches to 128. While that would place greater demands on organizers, the qualifying competition would become shorter because more teams would qualify automatically.
The tournament would likely shift to 16 groups of four teams, with the top two advancing to the knockout stage. That would end the awkward math of the North American tournament, where third place sometimes meant survival and sometimes did not.
For FIFA, a larger tournament would also generate additional revenue through broadcasting rights, advertising and commercial partnerships.
Critics, however, warn that a 128-match tournament would create scheduling challenges, with five or six matches played each day and more complicated television planning across time zones.
Asian Football Confederation head Salman bin Ibrahim Al Khalifa has cautioned that expanding to 64 teams so soon after introducing the 48-team format could undermine the value of qualifying competitions.
Portuguese coach Carlos Queiroz has also argued that qualifying for the World Cup must remain a meaningful sporting achievement.
A larger tournament would require substantially more infrastructure. A 128-match World Cup would likely need around 20 to 22 stadiums, compared with the 16 venues used across the United States, Canada and Mexico this year, making a single-country host increasingly difficult.
Spain, Portugal and Morocco designed their 2030 bid around a 48-team tournament. Expanding to 64 teams would require significant revisions to logistics and qualifying schedules, although Europe's qualification campaign has yet to begin.
Media reports suggest there is no certainty that the additional 16 teams would generate enough extra revenue to offset the higher costs of staging the tournament.
Critics also argue that repeated expansion risks diluting the prestige of a tournament that began in Uruguay in 1930 with just 13 teams.
(pu/gs)
Source: PAP