I think it is not about the EEA, but the the ECAA (European Common Aviation Area).
Norvegian everyone? Nothing will change....
Norway is part of the ECAA - the UK would need to negotiate a membership with the EU. And I see little incentive to let the UK in as European airlines have more to loose than to win from that. Norway is mainly in because otherwise SAS could not have been accommodated and nobody thought of Norwegian back then. All other ECAA members are really minor players and were let in because they pose no threat. Switzerland as a non-ECAA member has a bilateral with the EU, but this linked to other bilaterals that entail some of the very rights that led the Brits to brexit.