The time it takes to circumnavigate the Earth on commercial airplanes will depend on a number of factors, including the number of stops and layovers, flight schedules, and airline availability. Assuming you have enough money to purchase the necessary tickets, and are able to secure flights without extensive layovers or delays, it could take anywhere from a few days to several weeks to complete the journey.

One possible flight plan for circumnavigating the Earth could be:

1. Depart from New York City, USA to London, UK
2. Depart from London to Moscow, Russia
3. Depart from Moscow to Beijing, China
4. Depart from Beijing to Sydney, Australia
5. Depart from Sydney to Auckland, New Zealand
6. Depart from Auckland to Santiago, Chile
7. Depart from Santiago to Lima, Peru
8. Depart from Lima to Miami, USA
9. Depart from Miami back to New York City

This route covers approximately 43,000 miles (69,200 km) and would require at least eight separate flights. Assuming an average flight time of around 10 hours, the total time spent in the air could be around 80 hours. Factoring in time for layovers and any delays or cancellations, it's reasonable to estimate the entire journey could take around 2-3 weeks to complete. However, it's important to note that the actual travel time may vary depending on factors such as airline availability and scheduling, visa requirements, and other logistical considerations.
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