in addition to the hilton CC's, could also do a united MP explorer (I assume the 55k is still on the table), plus some inking if your spending habits are high enough and/or you can be bothered to do so.

So, 55k for MP Explorer, 50k for a premium ink card (min 60k after spend). With your current points balance, you could have 265k. Business class would be 240k miles for 2 tix. 320k would get you first class. And you could easily build up to that with the ink card with your time frame.

If whomever is traveling with you can sign up for some cards (psst, MP exp), you could either do 2 separate itens round trip (can do a stopover and an openjaw) or 2 one ways for first class, or save some UR points for hotels or future travel if you fly biz.

Trick will be getting to MLE for 2 in premium with a UA award. CMB is definitely doable...