The Stagwell-owned agency’s remit includes brand identity development, employee and customer engagement, and go-to-market planning for Allegiant.

The partnership comes weeks after Las Vegas-based Allegiant completed its acquisition of Minneapolis-based airline Sun Country Airlines, which had operated out of Minnesota for more than four decades. 

After receiving a key approval from the U.S. Department of Transportation, the two companies will continue to operate as separate carriers under common ownership, according to a press release.