James – I recently flew with my TT bike and had to research this thoroughly before flying with Delta. I rented a Scicon TSA 3.0 case from Transition Triathlon bikeshop in Leesburg, VA. The cost was $100 for 1 week and $6/day after that. The case was perfect and only weighs about 15#. My bike flew for free as a checked bag on Delta and no damage. It is a soft case, so you do sign a release on damage. Highly recommend this method for flying with your bike.