If you are visiting relatives abroad and staying at their home, your flight reservation should show when you plan to arrive and leave, not a hotel itinerary you do not intend to use. Choose an inbound flight to a convenient airport, a return date that fits the visit and passenger details matching your passport. A temporary flight reservation can help you prepare that travel plan before deciding which paid airfare to buy. Staying with family changes the accommodation story; it does not make the flight dates any less important.
Consider Maya, who lives in Manila and plans to visit her sister in Manchester for twelve days. Her sister will host her at home, and Maya is still waiting to settle time off work. The practical flight plan might be Manila to Manchester on November 6 and Manchester to Manila on November 18, potentially with connections depending on available schedules. She needs a clear itinerary that describes that trip, not a fabricated hotel stay in central London simply because hotel confirmations are common in travel files.
