Question: Cal Jet is headquartered where? 

Context paragraphs:
SuperJet International: SuperJet International (SJI) is a joint venture between Leonardo-Finmeccanica (formerly Alenia Aermacchi) and Sukhoi Holding established to sell the Sukhoi Superjet 100 (SSJ100), a 100-seats new generation regional jet with digital fly-by-wire flight control systems, and its business variant Sukhoi Business Jet (SBJ).  It is headquartered in Venice, Italy.  Initially with 51%, leaving 49% to Sukhoi, Leonardo revised its shareholding agreement in 2016 and cut its share to 10%.

Cal Jet Elite Air: Cal Jet Air LLC.  d/b/a Cal Jet Elite, is a United States airline business headquartered in Carlsbad, California.  Cal Jet Elite started in December 2015.  For the past several years Cal Jet has worked tirelessly planning to give North County, San Diego residents an alternative airport to fly from.  On August 16th, 2017 Cal Jet announced that The Carlsbad McClellan-Palomar Airport would be their home/hub, announcing daily non-stop service to Las Vegas's McCarren International Airport through a partnership with Elite Airways unveiling a new brand called Cal Jet by Elite Airways.

Center for Applied Linguistics: The Center for Applied Linguistics (CAL) is a private, nonprofit organization founded in 1959 and headquartered in Washington, DC.  CAL’s mission is to promote language learning and cultural understanding by serving as a trusted source for research, resources, and policy analysis.  Through its work, CAL seeks solutions to issues involving language and culture as they relate to access and equity in education and society around the world.  CAL’s President and Chief Executive Officer is Joel Gómez.

Nordica (airline): Nordica is the state-owned Estonian flag carrier headquartered in Tallinn and based at Lennart Meri Tallinn Airport.  It is the largest air carrier at Lennart Meri Tallinn Airport.  The airline was formed after the 2015 bankruptcy of the previous flag carrier Estonian Air.  Since most of the flights are marketed by LOT Polish Airlines, which owns 49% of the shares and a member of the Star Alliance, Nordica also carries LOT's flight codes and callsign on most of its flights.  Through its subsidiary Regional Jet in a partnership with Scandinavian Airlines, Regional Jet operates four ATR72-600s between Copenhagen, Aarhus, Aalborg, Billund, Goteborg, Hanover and other SK destinations.

Helix Energy Solutions Group: Helix Energy Solutions Inc., known as Cal Dive International prior to 2006, is an American oil and gas services company headquartered in Houston, Texas.  It is a global provider of offshore services in well intervention and ROV operations of new and existing oil and gas fields.

California Coast Credit Union: California Coast Credit Union (also known as Cal Coast) is the longest-serving credit union in San Diego County, headquartered in San Diego, California.  As of Q1 of 2017, it had more than $2.1 billion in assets, over 150,000 members, and 24 branch locations.

Air Partner: Air Partner Plc is a global aviation services group.  The Group is structured into four reporting divisions: Commercial Jet air charter, Private Jet Charter, air freight and Baines Simmons.  The Commercial Jet division charters large airliners to move groups of any size.  They also provide remarketing programmes for all types of commercial and corporate aircraft.  Air Partner is headquartered alongside Gatwick airport in the United Kingdom.  Air Partner operates 24/7 year-round and has 20 offices across Europe, North America, the Middle East and Asia.  The company is publicly listed on the London Stock Exchange as LSE: [ AIR] , and is also ISO 9001:2008 compliant for commercial airline and private jet solutions worldwide.

Evojets: evoJets is a private aviation company specializing in private jet charter and aircraft sales & acquisitions.  Founded in Aspen, CO in 2006, the company is now headquartered in New York City.  evoJets primarily offers on-demand jet charter services across USA and other international destinations.  It is a registered member of the Better Business Bureau in New York and Colorado, but provides charter services in the US and internationally.

Elite Airways: Elite Airways is an airline based in the United States operating charter and scheduled passenger flights.  The air carrier is headquartered in Portland, Maine.

McClellan–Palomar Airport: McClellan–Palomar Airport (Palomar Airport) (IATA: CLD, ICAO: KCRQ, FAA LID: CRQ) is a public airport three miles (5 km) southeast of Carlsbad in San Diego County, California.  It is owned by the County of San Diego.  The airport is used for both general aviation and commercial aviation.  In March 2013 the airport was the fourth-busiest single runway airport in the United States.  In August 2017, the airport announced a new commercial airline Cal Jet, would start operating flights in September 2017.

Supporting paragraphs: Cal Jet Elite Air Elite Airways
Answer: Portland, Maine