How Airlines Decide Where to Fly

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Key takeaways

- British Airways earned over $1 billion annually on London Heathrow–New York JFK, while American Airlines lost tens of millions flying Chicago–Beijing. American's route fell $80 million short of its annual revenue target despite using its smallest suitable aircraft, the Boeing 787-8, demonstrating that connecting large cities does not guarantee profitability.

- United Airlines retained 85% of its routes launched in 2015, compared with American's 76% and Delta's 70%. United also sustained unusual international services, including destinations such as Tahiti, Porto, and Naples, where it faced no competition from other US airlines at the time.

- Airlines use existing booking records and third-party flight-search data to identify demand that current routes do not serve. Skyscanner recorded 1.4 million annual searches for London–Kochi and 1.1 million for Bangkok–Barcelona, yet neither had nonstop service because passenger interest alone could not establish profitability.

“how many people want to go there, and how much are they willing to pay?” — United Airlines

- United cancelled its nonstop Los Angeles–Singapore service just one year after launching it in October 2017. Competing connecting flights cost as little as $444 round-trip, making United's nonstop service difficult to sell profitably; the airline instead added another Singapore flight from San Francisco.

- United committed approximately four aircraft to operate two daily Singapore flights, illustrating the opportunity cost of ultra-long-haul flying. Round-trip fares started around $800 for a 16-hour flight, comparable to United's $800 fares for a six-hour Washington–London flight, making aircraft productivity central to route selection.

- Chinese airlines operated 43 routes to Australia, while Australian airlines operated just three routes to mainland China. The imbalance reflected greater Chinese outbound demand, passengers' preference for airlines from their home country, and Chinese carriers' lower labor costs.

- American Airlines' 2017 Dallas–Reykjavik launch appears to have been a defensive move against Wow Air and Icelandair. American announced service shortly after both rivals, despite Dallas being an inefficient departure point for eastern US travelers; both Icelandic airlines subsequently withdrew from Dallas, protecting American's transatlantic hub.

- United's San Francisco–Tahiti route became possible only after a fleet reshuffle freed a Boeing 787-8. A newly delivered 787-9 replaced that aircraft on the busier San Francisco–Munich route, demonstrating how new services depend on aircraft availability as well as demand, airport access, and government approvals.

All points

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- British Airways earns more than $1 billion annually from its London Heathrow–New York JFK route. According to the video, this is the highest revenue generated by any airline on a single route worldwide, showing how valuable the right city pairing can become.

- American Airlines cancelled its Chicago–Beijing service after losing tens of millions of dollars annually. The route connected the world's 50th- and seventh-largest cities, yet passenger demand and ticket revenue were insufficient to sustain it.

- American's Chicago–Beijing route fell approximately $80 million short of its annual revenue target. The airline was already operating the Boeing 787-8 Dreamliner, its smallest suitable aircraft for that route, leaving limited room to reduce capacity without eliminating the service.

- Population size alone is an unreliable predictor of airline profitability. Even flights connecting two enormous cities can fail when passengers prefer competing airlines, cheaper connecting flights, or different travel arrangements.

- American, Delta, and United collectively introduced 101 new routes in 2015. These ranged from United's approximately 30-minute Chicago–Kalamazoo regional service to Delta's long-haul Los Angeles–Shanghai flight, demonstrating the different markets airlines attempt to develop.

- Approximately 70% of Delta's routes introduced in 2015 were still operating when the video was produced. Notable discontinued services included Orlando–São Paulo, New York–Manchester, and Philadelphia–London.

- American Airlines retained approximately 76% of its 2015 route launches. Discontinued routes included Dallas–Quito, Miami–Frankfurt, and New York–Birmingham, illustrating that international services can fail despite operating between established aviation markets.

- United Airlines retained approximately 85% of its 2015 route launches, outperforming both American and Delta on this measure. Its four discontinued routes were Houston–Peoria, Newark–Newcastle, Washington Dulles–Moline, and Denver–San Jose.

- Route survival rates do not definitively establish which airline plans routes best. Airlines have different risk tolerances, financial expectations, and willingness to continue operating underperforming services. However, United's higher survival rate, combined with its successful unusual destinations, suggests strong route-selection capabilities.

- United developed a competitive advantage by serving international destinations that no other American airline served at the time. Its exclusive long-haul destinations among US airlines included Melbourne, Tahiti, Taipei, Chengdu, Delhi, Mumbai, Naples, Porto, and Stockholm.

- Some international markets may support only one US airline profitably. By entering such markets before its domestic competitors, United could establish a position that other American airlines might find difficult to challenge economically.

- United also operated several long-haul routes without direct nonstop competition. Examples included Denver–Tokyo, Houston–Rio de Janeiro, Washington DC–Zurich, and Chicago–Edinburgh. The continued operation of these services for years indicated that relatively specialized routes could become sustainable businesses.

- United identifies two fundamental questions when evaluating a proposed route: how many people want to travel and how much they are willing to pay. Passenger numbers alone are insufficient; revenue potential must justify the aircraft, operating costs, and opportunities sacrificed elsewhere.

- Most new United routes connect destinations already served by another United hub. This allows the airline to estimate demand from its existing booking records rather than relying entirely on external market forecasts.

- United's 2015 Denver–Southwest Oregon Regional Airport service illustrates how existing passenger data supports new nonstop routes. United already served Southwest Oregon from San Francisco, allowing it to measure how many Denver passengers were reaching the destination through a connection.

- A new nonstop route can also improve connections for passengers originating in other cities. United's Denver service to Southwest Oregon gave travelers from Albuquerque, Sioux Falls, and Wichita a potential one-stop journey instead of the previous two-stop routing through its network.

- Connecting passengers are an important part of determining whether a route has enough demand. Airlines evaluate not only travelers beginning and ending journeys in the two cities directly connected, but also passengers who can reach the new service through other flights in the airline's network.

- Airlines must use outside information when considering destinations they have never served. This is particularly important for long-haul international services, where an airline may have little or no existing passenger history to establish demand.

- Flight-search platforms possess commercially valuable data about routes travelers want. Services such as Expedia, Google Flights, and Skyscanner can identify which city pairs people search for, and some sell related demand data to market researchers and airlines.

- Skyscanner recorded approximately 190,000 annual flight searches between Birmingham and Hong Kong. The figure indicated potential interest in a nonstop connection that was not being served when the video was produced.

- Skyscanner recorded approximately 420,000 annual searches between Delhi and Auckland. Existing passengers had to travel through connecting airports, suggesting a potential market for nonstop service.

- Bangkok–Barcelona generated approximately 1.1 million annual flight searches. Despite substantial search activity, the cities lacked nonstop service at the time discussed, demonstrating that apparent demand does not guarantee a profitable direct flight.

- London–Kochi generated approximately 1.4 million annual searches. This was another example of substantial potential demand that airlines had not converted into nonstop service.

- Flight-search volumes indicate passenger interest but are not equivalent to confirmed ticket sales. They help identify opportunities, but airlines must still determine how many searchers would actually purchase seats at commercially viable prices.

- A nonstop flight can attract customers already traveling between two cities through connecting airports. However, offering a more convenient itinerary does not automatically justify the higher costs of operating a direct service.

- Passengers generally pay a premium for nonstop travel, but that premium has limits. When cheaper connecting flights are available, airlines may be unable to charge enough for their nonstop service to cover its higher operating costs.

- United launched nonstop Los Angeles–Singapore flights in October 2017. The service was its longest route at the time and the only nonstop connection between the two cities, making it an ambitious attempt to capture premium demand.

- United cancelled Los Angeles–Singapore approximately one year after launching it. Connecting competitors offered round-trip tickets as cheaply as $444 at the time cited in the video, with reports of even lower fares during United's operation. United could not compete successfully at those prices.

- United redirected its Singapore capacity rather than abandoning the destination. After cancelling Los Angeles–Singapore, it added a second frequency between San Francisco and Singapore, demonstrating that the same destination could work better from a different hub.

- Low fares offered by Asian airlines were identified as a likely factor behind American's Chicago–Beijing failure. American struggled to match competing prices, reportedly leaving many seats empty on its transpacific flights. The explanation was presented as a likely cause rather than a fully established accounting of the route's losses.

- Airlines must compare every proposed route against alternative uses of the same aircraft. A service can generate revenue and still be a poor investment if another destination would produce greater profits with the same resources.

- United's two daily Singapore flights required approximately four aircraft. The lengthy flying times tied up substantial fleet capacity, illustrating the large opportunity cost associated with ultra-long-haul routes.

- United charged approximately $800 for a round trip on its 16-hour Singapore service, comparable to about $800 for a six-hour Washington DC–London round trip. Although the quoted fares were minimum prices rather than average yields, the comparison demonstrated why long-haul routes require careful financial evaluation.

- Aircraft productivity can matter as much as ticket revenue. A plane committed to a very long flight may earn less profit over a given period than one operating shorter, more frequent services, depending on operating costs, passenger demand, and fares.

- American and Delta's absence from nonstop Singapore service may have reflected better uses for their aircraft. The video suggests that United's willingness to operate the route did not necessarily mean competitors were overlooking an attractive opportunity.

- The same route can succeed for one airline and fail for another. Passenger nationality, preferred airline brands, language, labor costs, and the direction of travel can all influence how much traffic a carrier attracts and what fares it can profitably offer.

- Chinese airlines operated 43 routes between mainland China and Australia, compared with only three operated by Australian airlines. The imbalance demonstrated how passenger demographics and airline economics can influence which country's carriers dominate a market.

- The three Australian-operated routes were Qantas's Sydney–Beijing and Sydney–Shanghai services and Jetstar's Melbourne–Zhengzhou service. Chinese carriers served far more city pairs in the opposite national market.

- The video attributes part of Chinese airlines' dominance to the larger number of Chinese travelers visiting Australia. Travelers often favor airlines from their home country, particularly where language differences influence service preferences.

- Lower labor costs also helped Chinese airlines compete on Australia–China services. China's lower cost of living was identified as one reason Chinese carriers could offer more competitive fares than Australian operators.

- Passenger nationality and the direction of travel are therefore important route-planning variables. Two countries may have substantial travel between them without their respective airlines enjoying equal commercial opportunities.

- Airlines sometimes launch routes to defend their market position rather than maximize the route's immediate profitability. A strategically important service can prevent competitors from attracting customers to their broader networks.

- Wow Air announced Reykjavik–Dallas service on September 6, 2017. The Icelandic budget carrier's expansion threatened to give Dallas travelers another way to reach Iceland and connect onward to Europe.

- Icelandair announced its own Reykjavik–Dallas route less than a week after Wow Air's announcement. Two Icelandic airlines were consequently preparing to enter the same American market within a short period.

- American Airlines announced Dallas–Reykjavik service approximately one month later. Its announcement closely followed those of Wow Air and Icelandair, raising the possibility that protecting market share was a major consideration.

- Dallas was a fortress hub for American Airlines, making competitive defense especially important. American controlled a large share of traffic there and had a strong incentive to prevent competing airlines from gaining access to its existing customers.

- The greatest competitive threat from Icelandic carriers extended beyond flights to Iceland. Both Wow Air and Icelandair could carry Dallas passengers through Reykjavik to European destinations, potentially diverting traffic from American's transatlantic network.

- Dallas was an unusual choice for American's only Iceland route. Passengers from much of the eastern United States would need to travel westward to Dallas before flying back across the Atlantic, adding an inefficient detour.

- American had otherwise concentrated many leisure-oriented transatlantic routes at Philadelphia. Iceland's tourism market fitted that broader leisure strategy, making the decision to operate exclusively from Dallas more consistent with competitive defense than optimal passenger routing.

- The timing and location of American's Iceland launch suggest a defensive strategy, although the video does not establish American's internal reasoning. The airline appeared willing to accept an imperfect route in order to protect its larger Dallas operation.

- American's Dallas–Reykjavik strategy coincided with the eventual withdrawal of both Icelandic competitors from Dallas. Wow Air and Icelandair stopped serving the city, leaving American better positioned to retain transatlantic passengers. The video describes this as a successful competitive outcome, although it does not establish that American's entry alone caused both withdrawals.

- A route that loses money individually can still benefit an airline's overall business. If it prevents competitors from gaining passengers and preserves revenue across more profitable services, the wider network benefit may justify operating it.

- Iceland's increasing tourism popularity also influenced interest in new services. The country's tourism growth created genuine demand, meaning the Dallas announcements could reflect both commercial opportunity and competition rather than purely defensive motives.

- Approval of a proposed route does not mean an airline can immediately begin flying it. Even after completing the commercial analysis, the carrier must secure suitable aircraft, airport facilities, and necessary regulatory permissions.

- New aircraft availability is a major constraint on route expansion. Airlines generally need either an additional aircraft delivery or an existing aircraft released from another route before opening a service.

- United's San Francisco–Tahiti launch depended on obtaining a Boeing 787-8 Dreamliner. Because the route had relatively limited demand, United required its smallest long-haul aircraft rather than a larger aircraft that could create excess capacity.

- The Tahiti aircraft became available through a fleet reshuffle. Boeing delivered a new 787-9 Dreamliner, which replaced an older 787-8 on United's busier San Francisco–Munich service. United could then deploy the released 787-8 to Tahiti.

- Aircraft deliveries can therefore produce multiple changes across an airline's network. A larger new plane may replace a smaller one on an established route, allowing that smaller plane to launch an entirely different service.

- Airport gate availability can prevent or delay an otherwise attractive new route. An airline needs physical infrastructure to board passengers and operate flights at both ends of the proposed service.

- Landing slots are another constraint at heavily used airports. Airlines may require permission to take off or land at specific times, limiting their ability to schedule services even when sufficient passenger demand exists.

- International flights frequently require government approval. Regulatory requirements add another layer of planning before airlines can begin operating routes between countries.

- Launching a new route can take years from initial evaluation to its first flight. Airlines must combine demand forecasts, financial analysis, fleet planning, airport access, and regulatory compliance before beginning operations.

- Route forecasts cannot eliminate uncertainty. Even extensive research cannot fully predict competitor behavior, passenger responses, actual ticket sales, or other unforeseen developments after flights begin.

- Operating the route provides the ultimate test of its commercial viability. Airlines evaluate actual passenger numbers, fares, costs, and financial performance once the service launches.

- Airlines continually retain profitable routes and reconsider routes that fail to meet financial expectations. Underperforming services are generally cancelled or adjusted, while successful routes remain part of the network.

- Route planning is a continuous process of research, investment, testing, and reassessment. Airlines repeatedly allocate scarce aircraft and airport capacity among competing opportunities, seeking a relatively small number of routes that can sustain profits in a financially challenging industry.