Ok.......I'll do the work.
UA's compassion fare policy
AA has one
As does Alaska Airlines
You Asked: do you offer bereavement fares
Jenn: Alaska Airlines offers a bereavement discount to customers who are traveling last minute due to the death of an immediate family member. This discount is only available within 7 days of travel and must be booked in advance. For further assistance, please contact Alaska Airlines Reservations.
Westjet even has it
There are some that don't offer them but the major carriers have them. The statement made earlier that "airlines no longer offer bereavement fares" is completely false and the comment about case by case basis is also false.