OptionsHouse allows you to pick which exchange you’d like to get filled by for your option trades. You can access this option from the order ticket of an option trade via the Exchange drop down:
You can also bring up the exchange lookup from the action menu in the option chain:
Clicking on Exchange Lookup takes you to the exchange lookup window. From there you can choose to buy or sell the option from that particular exchange:
That will take you to an order ticket with the exchange you’ve specified in the exchange drop down.
NOTE: You cannot choose an exchange for stock orders.