It looks like it's about 4500 km from Longyearbyen to Istanbul, which seems like a charter flight could then really open up international access without regard to visas -- since Turkish Airlines flies to around 120 countries from Istanbul Atatürk Airport, which allows visa-free international transit¹.
I don't think this will happen since that charter would be insanely expensive, and it would be hard for large numbers of people who all can't easily get a Schengen visa to coordinate regularly to pay for it to happen at the same moment.
I think it would be a fun premise for a movie, at least.
¹ It might be challenging to convince the Turkish Airlines gate agents in all of the origin countries that the passengers, some of whom are not legally eligible to enter Turkey visa-free (https://en.wikipedia.org/wiki/Visa_policy_of_Turkey#/media/F...), are all planning to make an inter-airline transfer in Istanbul, although maybe they could all show some kind of boarding document for the charter.
https://en.wikipedia.org/wiki/List_of_Turkish_Airlines_desti...
I don't think this will happen since that charter would be insanely expensive, and it would be hard for large numbers of people who all can't easily get a Schengen visa to coordinate regularly to pay for it to happen at the same moment.
I think it would be a fun premise for a movie, at least.
¹ It might be challenging to convince the Turkish Airlines gate agents in all of the origin countries that the passengers, some of whom are not legally eligible to enter Turkey visa-free (https://en.wikipedia.org/wiki/Visa_policy_of_Turkey#/media/F...), are all planning to make an inter-airline transfer in Istanbul, although maybe they could all show some kind of boarding document for the charter.