I booked a flight from Newark to Paris with one stop in Dublin. After one week in Paris, I received an email from aer lingus telling me that my flight was cancelled. I called aer lingus which books me with flights with British airways because aer lingus made a mistake when rebooking. However, they booked me last year or pre covid flights from Paris to London- London to Paris that did not exist but had the guts to confirm the flights. So I just rebooked $2000 real flights with United Airlines. Will seek justice in the US. User's recommendation: Do not use third party justfly or any other.