Up to 27,000 Russian tourists had to find their own way home after tour firm Labirint folded due to economic constraints.
Many thousands are still overseas. Russian officials have already made arrangements to bring at least a third of the tourists home, but around 16,000 are reportedly stranded without return tickets.
The demise of Labirint marks the fourth Russian travel firm to go bust in just three weeks, leaving a total of 50,000 tourists marooned at some point during that period.
Citing a drop in customer demand, Labirint blamed its troubles on 'the negative political and economic situation' and the sliding value of the rouble.
A Russian tycoon also claimed his private jet remains grounded because the US sanctions. Gennady Timchenko told a Russian news agency that Gulfstream was no longer servicing his jet, and pilots were not allowed the use of navigation tools.