Question: Niki is scheduled to operate where?

Context paragraphs:
Niki destinations: As of March 2017, Austrian leisure airline Niki serves the following scheduled destinations.

Salt Spring Air: Salt Spring Air (also known as Saltspring Air) part of Harbour Air Seaplanes, is a floatplane company based on Saltspring Island, British Columbia, Canada.  It operates scheduled flights, charter air service and tours based in Ganges in Harbour Air Aircraft livery and specializes in routes between the Gulf Islands and Vancouver Island.  Along with West Coast Air, Harbour Air and Seair Seaplanes, Salt Spring Air is one of the four airlines that operate in the Vancouver Harbour Water Airport and Vancouver International Water Airport.  Scheduled flights by the company also operate between the Gulf Islands and the Vancouver International Airport.

Central Airlines: Central Airlines was a regional airline (then called a "local service" air carrier by the federal Civil Aeronautics Board which was known as the CAB) operating scheduled passenger flights in Arkansas, Colorado, Kansas, Missouri, Oklahoma and Texas from 1949 to 1967.  It was founded by Keith Kahle in 1944 to operate charter and fixed base services in Oklahoma and did not begin scheduled flights until September 15, 1949, just before its original certification expired.  Central was then headquartered at Meacham Field in Fort Worth, Texas.  The airline was eventually acquired by and merged into the original Frontier Airlines (1950-1986) which continued and expanded its service network.

Russian Sky Airlines: Russian Sky Airlines was an airline with its head office on the grounds of Domodedovo International Airport in Moscow, Russia.  It operate scheduled and charter cargo services to Europe, the Middle East and the Far East.  It also operate passenger services and VIP transport.  Its main base was Domodedovo International Airport.  In late 2014 the airline announce bankruptcy.  License was revoked by Russian aviation authorities on 24.12.2014

Inverness Airport: Inverness Airport (Scottish Gaelic: "Port-adhair Inbhir Nis" ) (IATA: INV, ICAO: EGPE) is an international airport situated at Dalcross, 7 NM north-east of the city of Inverness, Scotland.  It is owned by Highlands and Islands Airports Limited (HIAL).  The airport is the main gateway for travellers to the north of Scotland with a range of scheduled services throughout the United Kingdom, and limited scheduled service to Continental Europe.  Limited charter and freight flights operate throughout the UK and Europe.  Around 780,000 passengers passed through the airport in 2016.

North Shore Air: North Shore Air was a short-lived regional New Zealand scheduled airline that commenced daily flights between Auckland's North Shore and Tauranga in the Bay of Plenty, and Kerikeri in the Bay of Islands starting on 28 September 2015.  Scheduled flights ended on 30 October 2015.  The airline's CEO stated that the airline may operate charter flights instead.

Rogue Emperor: Rogue Emperor (; literally "Rogue Emperor") is a 2016 Hong Kong pre-modern romantic-comedy television drama created and produced by TVB, starring Kenneth Ma, Niki Chow, Mandy Wong, Benjamin Yuen, and Brian Tse as the main cast.  Filming took place from April till June 2014.  The drama was originally scheduled to broadcast after ""Master of Destiny"" on Hong Kong's TVB Jade and HD Jade channels on August 3, 2015 every Monday through Friday during its 8:30-9:30 pm timeslot with a total of 20 episodes.  On July 8, 2015 the drama was shelved again with no scheduled date of when it will be broadcast.  In November 2016, it was announced that the drama will finally have an air date of 12 December 2016, with the number of episodes decreasing to 17.

Flight cancellation and delay: A flight delay is when an airline flight takes off and/or lands later than its scheduled time.  The Federal Aviation Administration (FAA) considers a flight to be delayed when it is 15 minutes later than its scheduled time.  A cancellation occurs when the airline does not operate the flight at all for a certain reason.

Niki (airline): Niki (also styled as NIKI or flyNiki, legally "NIKI Luftfahrt GmbH") is an Austrian low-cost airline headquartered in "Office Park I" at Vienna International Airport in Schwechat.  It operates scheduled and charter services to European and North African leisure destinations from Vienna, Salzburg, Graz and Innsbruck and also started services from several German airports in March 2017.

Air Niamey: Air Niamey is a scheduled, formerly charter, airline based in Niamey, Niger.  Its main base is Diori Hamani International Airport.  It was formed as a successor to Air Niger, previously operating ACMI equipment only during Hajj/Umrah periods, but now it is going to operate scheduled flights, twice weekly, to Jeddah, and it will also be starting its domestic operations in Niger.

Supporting paragraphs: Niki destinations Niki (airline)
Answer: European and North African leisure destinations from Vienna, Salzburg, Graz and Innsbruck