right now, all you have is an "web interview" (which is usually psycho/social testing to determine if you are a good "fit" for the facility/unit (usually takes 30minutes-1hour to complete).
until you receive an actual job offer that you "accept" you really have no reason to even mention your trip.
after your web interview, i'm quite sure a telephone and/or a in-person interview will be scheduled. during your in-person interview (which i hope you get to have ), you
need to ask some important questions: how long is orientation? what will orientation consist of (computer based learning, amount/length of preceptor-orientee time, time learning new equipment, is additional time allotted to orientation/training, if needed, etc.) among other things. the answer to these questions will give you an idea as to whether or not you can expect a positive outcome regarding your trip. if your unit is currently short staffed and in dyer need of nurses on the floor, an extension to your training schedule (even 1 week) may not be easily accepted.
note: if a decision is made (job offer) based only upon a web interview alone i would "question" the job, unit, facility etc. and would suggest you make a visit to the facility/unit to shadow a nurse for a few days (at your expense) before accepting the job.
after being offered a job/hired, you will need to schedule some time (face-to-face meeting) with your unit manager/director and/or nurse educator (who may be handling your training schedule)
to discuss your training schedule and your travel commitment. your management team does not need to know the trip is "non-refundable" or where/why you are going on the trip, they only need
to know that you have a previous
commitment with flight arrangements already made and you would like to be able to schedule your training "around" this week long trip (hopefully it is not longer than one week)
. as another side note, if you are offered the job, i would suggest that you never miss a day of work, other than this trip, during your orientation/training or make any other changes to your training schedule.
...be prepared, just in case, if you cannot make adjustments to your training schedule to accomodate your trip.... have a plan b in place (i.e. someone you can sell your ticket to...or place on ebay...)
best of luck
with the web interview and
a job offer.
enjoy your trip!!