Airline name or IATA code (designated by the 2-letter airline code that precedes the flight number, sometimes called the IATA code) Flight number (695) City of departure and/or city of arrival specified more commonly by another FAA-specified 3-letter code (helpful if you know the airport code).
Most airline flight miles portions of these airlines aren’t set up to handle these transactions, but can give you the phone number to the company when asked.
Be careful if they ask for additional payment to find out additional information about the flight.