United has a flash sale for flight between mainland USA and Hawaii. You can get a 20% discount on miles used for saver awards flights if you book by 3/14/18 11:59pm CST and travel between 4/9/2018 and 5/20/2018. There’s no promo page, but discounted rates are showing on United website. Here’s an example from EWR to HNL. Flights from the East Coast will give you the best value for your United miles since they can cost over $800 in cash.
- Book by 3/14/18 11:59pm CST
- Travel from April 8, 2018 through May 20, 2018. No blackout dates.
- Valid for travel to/from Hawaii
- Travel must be booked on a round-trip basis
- Promotion is valid for United and United Express operated flights only
- Economy cabin only
- No stopovers are permitted
This should be a decent use of miles for most people. If you don’t have enough United miles, you can always transfer Chase Ultimate Rewards points. You can also book through Flying Blue, Korean Air SkyPass or Virgin Atlantic for even less miles.
You might also want to test out this trick, to earn a $1,000 voucher.