American Express Membership Rewards members can save 10 percent off roundtrip coach Web fares for travel between Hawaii and select U.S. Mainland cities on Hawaiian Airlines. The offer is valid on bookings through June 7, for travel through June 9.

To take advantage of this offer, log onto http://www.hawaiianairlines.com/ecertificate and enter ecertificate number P05003 and code 027BG5D9RKDB.

Hawaiian offers more than 130 daily flights between five major Hawaiian Islands and direct service to Honolulu or Maui from San Diego, Los Angeles, Ontario, California, San Francisco, Sacramento, Phoenix, Las Vegas, Portland and Seattle.