We've gone through lots of different flights, to help you find the cheapest way to get from London Heathrow to Praia. You can choose from zero airlines. At the moment, 22 / Dec / 2020 is the cheapest date to travel, but scroll through the results to find the option that works best for you.
If you want to broaden your search, look at flights departing from other airports.
You can view all flight times yourself in the results list.
You can also search by month, which will reveal the cheapest time of the week to fly.