So you don't really need United miles to book a flight on United, and sometimes you can even
save valuable miles.
Not exact matches
Looking at the numbers;
Saving 10 - percent on fuel for a vehicle that gets only 8 mpg over a yearly driving cycle of 40,000
miles is almost eight times more
valuable than increasing the fuel economy of a vehicle getting 30 mpg that is driven only 20,000
miles per year.
It is best to
save miles for something more
valuable.
Those
miles are so
valuable I
save them for something like Cathay Pacific first class.
It could be useful, but you've essentially paid $ 100 and parted ways with 50k Amex, Chase or SPG points (much more
valuable than UA
miles) to
save on 60k less
valuable United
miles & now you need to take two trips to Hawaii when for most people vacation time is limited and they may not want to visit the same place twice in 1 year.