How long do planes last?

Related questions

1. Where is United Airlines in Frankfurt airport?
2. What is United Economy seating?
3. Does United Airlines have assigned seating?
4. What kind of company is United Airlines?
5. How many destinations does United Airlines fly to?
6. Is United Airlines employee owned?
7. What is a united preferred seat?
8. Does United Economy include seat selection?
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10. Is United Airlines a US company?

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