Booking with SWISS 40 days in advance of your planned departure date is, on average, the best time to get cheap flights from Johannesburg OR Tambo Airport to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Currently, the most affordable month to book a SWISS flight from Johannesburg OR Tambo Airport to London Heathrow Airport in March, with an average price of £400. Conversely, traveling with SWISS from Johannesburg OR Tambo Airport to London Heathrow Airport in August will be the most expensive, with an average cost of £547. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.
In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.
If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).
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