I've only flown one RTW trip and that was on ID90s... It was very fun though and I think most of my flights can be found cheap on the internet.
It was like this:
with Icelandair, Air Canada Jazz and United.
with TACA (saw Machu Picchu, totally recommend it! Going back there someday it was so good
with Air Canada (to see Niagara Falls)
with Air Canada
with Cathay Pacific
on Cathay Pacific
on Air India (777-300ER domestic
with Oman Air
with Emirates, Air France and Icelandair (380 + 318 in the same day!
I wrote a TR
series on that trip which can be found in the Trip Reports section (don't search as the search function doesn't work, just click on my latest TR
and you can find earlier reports at the bottom