Why are flights in the US so expensive?

Related questions

1. Do travel agents fly free?
2. Do travel agents get discounts on flights?
3. What day is best to book a flight?
4. Do flight prices go up and down?
5. Do travel agents cost money?
6. What is the best day to buy airline tickets?
7. Is it cheaper to book flights online or with a travel agent?
8. Do travel agents get better prices?
9. Does Skyscanner increase prices?
10. Do flight prices go up as you search?

Tags

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2. #while
3. #routes
4. #served
5. #airline
6. #higher
7. #single
8. #between
9. #where
10. #airlines
11. #europe
12. #fewer
13. #smaller
14. #chicago
15. #fares
16. #those
17. #flights
18. #especially
19. #there
20. #airfares
21. #airports
22. #competition