HONOLULU, September 14, 2006 - go!, the interisland Hawaii division of Mesa Air Group Inc, (Nasdaq:MESA) and Mokulele Airlines today entered into a memorandum of understanding to establish a code share agreement to service new Hawaii destinations.

The new services will fly under the go!Express brand and customers will be able to earn valuable frequent flyer miles on all go! flights.

Mokulele Airlines was recently granted authority from the Department of Transportation to provide scheduled service. It will operate a brand new fleet of Cessna Grand Caravan 208B aircraft in the go!Express livery to Kapalua, Lanai and Molokai from Honolulu. It will complement existing service provided by go! to Lihue, Kahului, Kona and Hilo. go!Express will also offer other non-stop services between neighbor islands.

"I am excited by the great opportunities this partnership will bring to the smaller communities of Hawaii,” said Mokulele Airlines CEO, Bill Boyer. “As a Hawaii company, we are delighted with the opportunity to further develop our passenger business. Our expansion will create many new jobs in the local communities and make travel more convenient and less expensive for kamaaina and visitors. None of this would have been possible without our new partnership with go!," added Boyer.

"Bill Boyer and Mokulele have supported the go! team since our inception of service in Hawaii. Our new partnership with Mokulele, operating as go!Express, will extend our network and offer market leading low fares to more travelers throughout Hawaii. go!Express will strongly support our mission to bring families and friends together while creating great new business opportunities," said Jonathan Ornstein, Mesa Air Group Chairman and CEO.

The new go!Express flights are expected to begin in December 2006 and will soon be available online at: www.iflygo.com. go!Express passengers will fly in first class comfort in 34" pitch leather reclining seats, enjoy state-of-the-art inflight entertainment for the very first time on interisland services and earn valuable frequent flyer miles on go!

Mokulele Airlines was founded in 1998 in Kona, Hawaii. Based on the Island of Hawaii, Mokulele Airlines currently operates charter services between the islands as well as Circle Island Tours around the Island of Hawaii. The Company prides itself on its operating record and reputation for providing exceptional service with genuine Hawaii hospitality. This year, the airline received the 2006 West Hawaii Today's Best of West Hawaii award, "Best Air Tours."

With the purchase of new Caravan 208B aircraft, Mokulele will have one of the youngest fleets in Hawaii. Mokulele is a member of Regional Aviation Partners. For further information visit www.MokuleleAirlines.com

go! also offers special reduced fares for military personnel, their spouses and dependents. Active duty personnel from every branch of the U.S. military are eligible, including the Army, Navy, Air Force, Marines and Coast Guard, as well as active duty members of the Reserve and National Guard. In addition to these discounts, go! is also waiving ticket change fees for military fares.

Special military fares must be booked via the go! toll-free reservation number at 1-888-IFLYGO2 and are subject to certain restrictions. Seats are limited and may not be available on every flight.