Openflights has long been the tool many of us use to log their flights, but it has two big problems:

1 - You can't add new airlines, so my recent flights on ITA Airways and Breeze, for example, can't be logged as such.
2 - The "List flights" function currently appears to be broken. It lists flights only partially.

It hasn't been maintained for years, either, and that is a concern. It might stop working one day and take all our logs with it.

Flight Memory or Myflightradar24 are imperfect replacements; they do not offer the same functions. The former is also antiquated and not maintained, and the latter, for example, does not let you input the actual distance flown.

So, does anybody have a good alternative that isn't one of the above sites? Thank you!