Scroll through the results for cheap flights to Fortaleza in Brazil. To get the best deal, we'd advise booking in advance, particularly if you want to fly with a specific airline. Check your dates and see.
If these flights are too expensive, try searching for a different time of year. It's likely that prices for both flights and accommodation in Fortaleza will be higher during November. Meanwhile, July is nearly always the cheapest time to fly. So if your dates are flexible, consider looking at different times of year.
So, if the flights to Fortaleza don't work for you, you could always try searching for flights to other airports in Brazil.
Looking at a few different departure airports will give you even more choice. See what you can find. And remember, it's best to book your flights in advance wherever possible.