TAP Air Portugal is planning a significant change to its Porto–Luanda service, deploying the Airbus A321LR on the 3,737-mile (6,014 km) route from October 31, 2027. The move will create the airline's longest scheduled nonstop A321LR flight, narrowly surpassing its existing Lisbon–Belém service. According to AeroRoutes, TAP's preliminary winter 2027/28 schedule replaces the A330-900 with the A321LR on its twice-weekly service from Porto to Luanda, connecting northern Portugal with Angola's new Dr. António Agostinho Neto International Airport. The proposed schedule has TP293 leaving Porto on Friday afternoons and Sunday evenings, with TP294 returning from Luanda on Monday mornings and Friday nights.

The decision is particularly noteworthy because TAP intends to replace its 298-seat Airbus A330-900 with a 171-seat narrowbody, reducing passenger capacity by approximately 43%. The change will reduce weekly capacity from 1,192 to 684 seats across both directions, a reduction of 508 seats. TAP's A321LR accommodates 16 business-class and 155 economy passengers, compared with 34 business and 264 economy seats on its A330-900s. The smaller aircraft could allow TAP to better match capacity with demand while maintaining nonstop service.

When TAP first received the A321LR, then-CEO Antonoaldo Neves explained its strategic importance: “With its superior range, we can comfortably explore new markets in North America, South America and Africa from Portugal, and offer nonstop flights with the right size of aircraft.” However, the long sector raises operational questions. Airbus advertises an A321LR range of approximately 4,000 nautical miles, equivalent to 4,603 miles (7,408 km), comfortably exceeding Porto–Luanda's great-circle distance on paper, but range depends on payload and operating conditions; heavy checked baggage, commercial cargo, headwinds and fuel reserves could all influence performance. TAP has not announced any passenger or baggage restrictions, and whether either will be necessary remains unknown. The change remains provisional, with almost a year until its planned introduction.

The Porto–Luanda deployment will surpass TAP's Lisbon–Belém service by just 11 miles (18 km). TAP's planned 2027 A321LR network includes 16 nonstop routes exceeding 2,000 miles (3,219 km), and six of the ten longest connect Portugal with the Americas, three of them serving Brazil. The record applies only to nonstop flights: TAP has operated longer one-stop A321LR services, including Lisbon–Belém–Manaus, covering a combined 4,534 miles (7,297 km).