Originally Posted by
NYC Flyer
I'm unaware of any airline website or OTA that has implemented this capablity. Generally, only cheapest basic, cheapest restricted and sometimes cheapest flexible fares are shown for each cabin. Need to call the airline or a travel agent to request a specific booking class.
Advanced search on DL (and before that PMNW) permitted one to specify fare class XXX or higher, and you are then shown class XXX if applicable and available and otherwise higher fare classes. This feature can be used to avoid broken fares by asking for the higher of the fare classes shown for the broken fare.