en.wikipedia.org
en.wikipedia.org
http://en.wikipedia.org/wiki/Round-the-world_ticket
intransit.blogs.nytimes.com
intransit.blogs.nytimes.com
http://intransit.blogs.nytimes.com/2007/04/13/pros-and-cons-of-an-around-the-world-ticket/
wikitravel.org
wikitravel.org
http://wikitravel.org/en/Round_the_world_flights
www.airtreks.com
www.airtreks.com
http://www.airtreks.com/
www.independenttraveler.com
www.independenttraveler.com
http://www.independenttraveler.com/travel-tips/air-travel/around-the-world-tickets-and-fares
www.oneworld.com
www.oneworld.com
http://www.oneworld.com/flights/round-the-world-fares/
www.roundtheworldticket.com
www.roundtheworldticket.com
http://www.roundtheworldticket.com/
www.staralliance.com
www.staralliance.com
http://www.staralliance.com/en/fares/round-the-world-fare/