My coworkers and I move to different project sites on time scales ranging from 1-5 years. We do government software and live on-site in the capitols where we're working. Most developers move from one semi-permanent office to another new client after the project transitions to a maintenance mode.
Experienced devs in particular sub systems might go on 1-3 week trips to other locations to bootstrap or assist on large issues.
Devs are also a large part of our marketing department. A few are regularly tasked with putting together demos for clients and delivering them on-site; others help as needed.
Most devs also have the opportunity to attend career fairs to assist the recruiters. I've personally attended 3 in 4 years. It's such a good opportunity to be the face of your company and have the first round recommendation on hires. Sure the management has the final say but they definitely value our input.
My job is defined by travel, some stops are just longer than others.
If any of this sounds interesting to you, shoot me an email, I'd love to talk with you about it.
This group of friends include HP, Oracle (formerly Siebel) and VMWare employees/contractors. All of them that I talk to regularly dislike the travel because of the big company horseshit that goes along with it. I've turned down this work repeatedly because of the travel and the company crap associated with it. Of the people I've talked to about it, only those with unstable or shitty home-lives like the travel a majority of the time.
AFAIK, my friends that do not work for huge companies do not travel much outside of conferences and the like.
I wouldn't go that far. If you're single, the travel is a hell of a lot of fun. You usually have expense accounts and get to see parts of the world on someone else's dime. I traveled 48 of 52 weeks a year for 6 years and loved it. But my personality loves constant change. I liked being able to change most of the people I worked with every month or so and solve new organizational problems.
To answer the OP: any kind of service/support role in the technical side can give you lots of travel. Install this new server, or help clients get up to speed, or debug this thingy onsite. But, be sure to figure out what this entails: are you working 5 hours and then carousing in NYC (the vision), or working 17 hour days in some dingy facility in the middle of Iowa? To make all that plane flight + hotel + expenses + salary pay off, it's likely to lean towards the latter.
I made a joke that is no joke to my gf from my hotel room a few weeks ago: "you know those bar/restaurant/hotel travel scenes in 'House of Lies'? My trip is exactly not like that"
Which is not to dissuade you; plenty of people have great travel for work experiences. It is just a suggestion to figure out exactly what you will be getting, and to look inside yourself to figure out if it appeals to you.
Also, all of these folks are 40+ years old, which I think makes a difference.