Japan's world champion female Olympic footballers flew economy class to Europe, while the less successful men's team flew business.
And the issue of gender inequality at the games has also raised its head in the Australian team, after it was revealed the women's basketball team were cramped in economy while the men's team stretched out in business.
Japan's women's football team play a warm-up match against France today before flying to London.
In Paris, star player Homare Sawa told Japanese media: "I guess it should have been the other way around ... Even just in terms of age, we are senior," she said.
Sawa, 33, playing in her fourth Olympics, acknowledged the team had temporarily been awarded business class seats after they won the world cup in Germany last July.
But the Japan football association has since returned female players to economy, although they were given a little extra leg room in premium economy during the flight to Paris, thanks to their status as potential medallists, The Guardian reported.
Sawa and other high profile players have commercial deals, and appear on TV. They are the first sports team to receive the people's honour award from the government.
They take form into London, with a 3-0 thrashing of Australia. Meanwhile, the 20th ranked men played a 1-1 draw with New Zealand, ranked 95.
Japan's Olympic committee said most of the country's Olympic athletes, as amateurs, flew economy, with exception made for judoka and other physically large competitors.
The JFA said the men's football team, as professionals, had been given business class seats since the Atlanta Olympics in 1996 in view of their professional status.
Meanwhile, Australia's federal sports minister Kate Lundy has hit out at the discrepancy between the women's and men's basketball teams.
After it was revealed the Opals flew premium economy to London, Senator Lundy and Sex Discrimination Commissioner Liz Broderick called for the inequity to be rectified.
Further investigation reveals the Opals are not alone in being treated as second-class citizens. Australian women's soccer and cricket teams are flown economy, while their male counterparts' teams travel in business. This is despite the fact that, in basketball and soccer, the women's teams have much higher international rankings.
In London, Australian chef de mission Nick Green declined to criticise Basketball Australia - which has recently installed former New South Wales premier Kristina Keneally as chairwoman - saying only that the Australian Olympic Committee provided return economy airfares for all team members with Qantas, an official sponsor.
"We're comfortable for the sports to look after their athletes... We give them the travel subsidy to travel with Qantas, our partner, and the sports themselves determine how they use that," Green said.
The men's basketball team had a written agreement with Basketball Australia that members would be flown business class for any flight over three hours. It was understood the women had no such arrangement. Opals captain Lauren Jackson travelled first class to London, but only because she was a Qantas "ambassador".
A Basketball Australia spokeswoman said the women's and men's teams had separate budgets that the respective leadership teams were consulted about.
However, The Age had been told that frustrated current members
of the women's Opals team had been lobbying for better treatment
for some time.
The Basketball Australia spokeswoman said that the height of the teams was also taken into consideration: the average height of the men was just over 200 centimetres; for the women it was 183 centimetres.
But the Australian team includes Victorian Liz Cambage, who at 203 centimetres is a future international star. By contrast, Boomers star Patrick Mills is 183 centimetres. He travelled business class, as did Cambage after she upgraded her premium economy ticket out of her own pocket.
Senator Lundy said that travel arrangements were a matter for the AOC and the individual sporting organisations, "however my view is that team travel should be equitable for our male and female athletes".
"Our Australian basketball teams, the Opals and the Boomers, both play the same game, they're both tall and they are both equally committed to representing Australia at the Games. They shouldn't have to travel a different class because they're both world class."
The Opals have won silver medals at the last three Olympics, and won bronze in 1996. The Boomers have never won an Olympics medal.
Former Opals captain Robyn Maher said Australian female basketballers had repeatedly asked Basketball Australia to justify the inequity, but had received no satisfactory answers. "Over the years it's been a multitude of [reasons given] - the men get better funding, so they've been able to do it; the men are bigger so they need more space," she said.
"It's been a bit of a sore spot, especially since the women are much more successful. I'm yet to find a nice answer for it other than they're male and we're female. You'd hate that that's the reason, but I'm sure it is."
Football Federation Australia said the reason it discriminated was not to do with gender bias. "The Socceroos tend to be scattered all over the world and need to be flown into various locations on short time turnrounds," a spokesman said.
"They fly business in that situation because it is a matter of recovery time and giving them every opportunity to be in the best condition."
The Matildas, some of whom play overseas but with many who are home based, are often gathered together in camp in Australia before important fixtures and usually then fly out in advance for games in time to get over any tiredness before they take the field.
Cricket Australia's rationale was that the men's teams spend more than 200 days of each year on the road and generate a high percentage of the revenue that is then plunged back into the game to develop women's cricket.