Flight attendants threaten strikes over low pay and unpaid work

Flight attendants are calling for substantial wage increases and improvements in working conditions.

The Association of Flight-CWA represents more than 6,500 flight attendants at Alaska Airlines .

The union is still working under a 2014 contract that was extended twice and has requested mediation with the National Mediation Board .

The last strike by American Airlines flight attendants was in November 1993 .

The union has been in direct negotiations with United for 21 months .

The delays have disillusioned flight attendants and depressed morale.

United says it is continuing to work with the Association of Flight Attendants toward an industry-leading agreement.

All United flights will operate as planned while flight attendants exercise their right to distribute information and picket while off-duty.