[kelnos]

Assuming that's allowed: many lease agreements in major cities in the US explicitly disallow sublets, or require landlord approval. Landlord wouldn't have any (financial) incentive to approve since they get money either way, and taking on a temporary subtenant is usually higher-risk than a regular renter.

Then again, if the current tenant has a lead on someone to potentially take over the lease and become a long-term tenant, then everybody wins.