May 11, 2011 - 10:59 AM
Hi Richard! As far as I know, the Swiss Pass and Swiss Flexi Pass are considered to be the same when discounts on regional railway passes are concerned. So yes, your (valid) Swiss Flexi Pass should allow you to purchase a discounted Jungfrau Railways Pass as well. To be 100% sure, you could best contact the Jungfrau Railways.