IAD-BOS For $130 + Around The World/2500 Miles + US Fares
UA has a fare match to Indy Air for either BOS-IAD or IAD-BOS. Using the UA 5% off (see the UA FAQ thread) the ticket costs $130.80. Besides miles you receive credit in the Around The World promo as well as a 2,500 IAD UA offer. It is not a great cents per mile value, and again only two segments. But I find it is very doable without having to take full days off work, etc. Similarly right now US is publishing a 14 day adv purch BOS-DCA or vice versa $118+tax roundtrip. You can get at least 4 segments like BOS-PHL-DCA (3x Go Fare miles BOS-PHL). You can also do BOS>LGA>DCA or BOS>HPN>DCA. I have not tried to get 6 segments but I think I will try like BOS>LGA>PHL>DCA and see if it prices.