If you want a cheap flight from Glasgow to São Paulo, you've got one airlines to choose from.
You can use the filters on your search to see more flights and find cheaper rates – São Paulo has more than one airport. So if you don't need to fly into São Paulo Viracopos (Campinas International) Airport, it's worth checking your other options. The 9659 km flight usually takes about 17 hrs.
You can expect accommodation prices to be higher at this time of year too. Last-minute deals do crop up, but it's best to book everything in advance to avoid disappointment.