There are few dates with cheap flights from London (from £45) and Manchester (usual price around £90) available at the moment.
The fares are usually in the range of 5-7 days, mostly at the end of the week when flying from Manchester or at the beginning of the week when flying from London.
The flights are operated by Easyjet and the fares include standard cabin baggage.
What will the weather be like in the Czech Republic?
September is still considered as a summer season in the Czech Republic and the weather may still be very warm during some days with still around 13 hours of daylight. In around mid-October, you may notice a sudden change of weather. It may become a bit windier with occasional rain. You will still, however, experience plenty of nice and sunny days during this month.