exhibit 10. 20 [ * * * * * ] = pursuant to item 601 ( b ) ( 10 ) of regulation s - k, portions of this exhibit have been omitted as the registrant has determined that certain confidential information contained in this document, marked by brackets, has been omitted because it is both ( i ) not material and ( ii ) the type of information that the company treats as private and confidential. october 10, 2022 surf air mobility, inc. 12111 crenshaw boulevard hawthorne, ca 90250 usa re : master agreement ladies and gentlemen : this master agreement ( this “ agreement ” ) is intended to summarize the principal terms of the agreements between jetstream aviation capital, llc ( “ lessor ” ) and the lessee as articulated herein ( the “ lessee ” ) regarding the sale of certain aircraft specified herein and / or the assignment of purchase rights by the lessee ( or an affiliated entity controlled by lessee ) to the lessor and lease by the lessor to the lessee of such aircraft specified below ( each a “ transaction, ” and collectively, the “ transactions ” ) each pursuant to a separate binding sale and purchase agreement for each individual aircraft ( a “ sale agreement ” ) and, in connection therewith, a separate binding lease agreement for each individual aircraft ( a “ lease agreement ” ) ( collectively, the “ transaction documents ” ). the effective date of this agreement refers to the first trading date of shares of common stock of lessee or its affiliate on a united states national securities exchange ( which, for the avoidance of doubt, may occur following a business combination with a special purpose acquisition company, or spac ) and provided that lessee has consummated its merger with southern airways express, llc ( “ operator ” ). it is the intention of the parties that the aircraft will be leased to, and operated by, the operator and / or its affiliates. the terms and conditions herein are not intended to be exhaustive and are intended only to summarize the principal terms of the transactions. lessor and lessee individually are referred to herein individually as a “ party ” and, collectively as the “ parties ”. the transaction documents will reflect the following terms : lessor : jetstream aviation capital, llc and / or its affiliates and / or successors and / or assigns ( “ lessor ” ). lessee : surf air mobility inc. and / or its affiliates and