Scan the checklist, then apply it to any route page with the search form.
If you want, open the search in a new tab via Aviasales. Реклама. Go Travel Un Limited. ИНН 9909520797
Check Airport Code
When buying a ticket and planning a transfer, always look at the three-letter airport code (IATA).
In London there are 6 (LHR, LGW, STN, LTN, LCY, SEN). Arriving at Heathrow instead of Gatwick is a classic rookie mistake. The distance between them is hours of driving.
Changing Airport During Connection
Sometimes cheap tickets involve changing airports (e.g., arrival at Paris Charles de Gaulle CDG, departure from Orly ORY).
Budget at least 4-5 hours for such a connection. You will have to collect luggage, pass the border, drive through traffic to another airport, and check in luggage again. It is tiring and expensive.