Airbus introduced the newest member of its A320 family on Monday: the A321XLR. The new variant has a range of about 5,400 miles, and according to Airbus, a 30% increase in fuel efficiency over some of its competitors.The new plane, introduced at the 2019 Paris Air Show, really expands the map of cities that could be linked by direct air service. With the A321XLR, airlines will have an extremely economical option for long-haul flights, according to Airbus. The plane can fit almost as many passengers as some smaller wide-body jets, but with narrow-body economics; that means airlines will be able to use the XLR on routes that did not have enough demand to profitably fill bigger jets with higher operating costs.The plane is well-positioned to replace aging Boeing 757s in many fleets, especially as Boeing continues to focus on fixing its 737 MAX before releasing plans for its rumored new mid-range aircraft.Here are just some of the city pairs that could (theoretically) see very long-range narrow-body service once the A321XLR begins flying:New York – RomeBoston – Dubrovnik, CroatiaCharlotte, North Carolina - BerlinAtlanta - BarcelonaWashington – LisbonSign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.Fort Lauderdale, Florida – LondonMiami – Buenos AiresChicago – CasablancaHouston – HonoluluLondon – DelhiSydney – TokyoDubai – Cape TownSeoul – DohaIstanbul – Maldives