score:5
This gets tricky and I would advise caution to anyone relying on this answer at any point in the future without further research but for now you are good if you are booking a flight on the Condor website going into Frankfurt (or Dusseldorf or Munich as we will see) and an outgoing flight on Lufthansa.
You need Condor to be able to book Lufthansa flights for you to avoid a visa requirement. This is necessary because you need a confirmed ongoing flight and if your incoming flight is late, you need Condor to rebook you to have one.
Now, how is it possible that Condor books Lufthansa flights? They have a Special Prorate Agreement or SPA in place which allows for this. And this agreement stays in place for the foreseeable future because the Lufthansa group is dominant on the feeder network into Frankfurt, Munich and DΓΌsseldorf according to the German Federal Cartel Office (Bundeskartellamt) therefore they need to provide access to it for antitrust reasons. According to the Bundeskartellamt itself:
Only based on the Special Prorate Agreements (SPAs) concluded by the airlines can Condor offer [...] full protection in case of delays or flight cancellation.
Lufthansa tried to cancel the SPA, Condor complained and the German authorities said they agree with Condor -- and they found the agreement need to be even more in favor of Condor than what it asked for originally. AFAIK no final ruling has been made yet source but the preliminary ruling from February 2022 forces the SPA to continue and it's not likely Lufthansa will prevail any time soon in cancelling it. Any changes must be announced a year ahead so for now you are good.
Upvote:5
It depends on your citizenship and the type of ticket you have:
You are arriving from outside the Schengen Area and your destination is in a non-Schengen country: Usually no passport check is mandatory, provided that that you do not leave the transit zone. Depending on your nationality, you may require a transit visa. If in doubt, please contact an embassy or consulate of your country.