What is the lifetime of the OptionRefId?

On TGX the OptionRefID, independently it is the one returned on Search, Quote or Booking, does not have a limit of usage, you can use it a day after, a week after... the lifetime of an Option it depends fully on the final Seller.

Please note that some Sellers have their time restrictions between methods, which means that probably one of your Sellers establish a maximum of 5 minutes to perform a Quote since you receive Availability results.