The cost of circumnavigating the Earth on commercial airplanes will depend on a number of factors, including the specific flights, travel dates, and any additional expenses such as visas or transportation to and from airports. However, based on the flight plan I provided and assuming standard economy class tickets, the cost could range from approximately $3,000 to $5,000 USD or more.
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It's important to note that prices can vary widely depending on the airline, time of year, and other factors, so it's important to compare prices and book early to get the best deals. Additionally, you may need to budget for additional expenses such as travel insurance, meals and accommodations during layovers, and any visa or entry fees for the countries you plan to visit.
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