First of all, I admire your desire to travel and study abroad. I lived abroad for many years and I think that the perspective that you will obtain from experiencing different cultures is irreplaceable. Many people these days have no real interest in the way the rest of the world works and I think that your desire to open your mind is admirable.

Now to your question regarding the airlines. Unfortunately, I do not know of any regional (or major) that will employ you and then permit you to take leave other than for documented military or medical leave. Bear in mind that your first year at most if not all companies will be probationary.

The airlines are hiring intensively right now. I expect that to continue for several years however there is no guarantee of that. As the saying goes, the only sure thing about the airline business is that nothing is sure...

Here is what I suggest. If you feel that you would regret missing out on the opportunity to study abroad, then go for it and do it! This may be your only opportunity to do this. Most likely, after a year the airlines will still be hiring and the only thing you will have lost is your place on the seniority list.

However, if you feel that you really want a career in the airlines then I would suggest getting on with a 121 carrier as soon as possible. Unfortunately seniority rules and the sooner you get on with a 121 carrier, the better your job security and the sooner you will upgrade and be eligible for your ultimate goal.

If you get on with a regional now, within a reasonable time of hitting the line you should be able to hold enough days off and with some trip trades/drops be able to travel abroad as much as you can afford to on a regional FO's budget... Actually, if you plan well and take advantage of all the airline discounts/ non rev travel privileges, you should have no problems.

There really is no perfect solution to your dilemma. You just have to figure out what is most important right now.

Best of luck to you.