How long before I fly do I need to test myself? 04 December 2020 11:11 Updated Thank you for your enquiry, you can calculate the time requirements including when your flight is by using our specific instructions on our website. You can visit this here Thank you Related articles When do I need to complete my test? Can I drop off my postal test at a click and collect site? I’VE TESTED POSITIVE, WHAT DOES THIS MEAN ? What days are you open? Can the antigen/lateral flow tests be used for flying both into and out of the UK?