With some Economy Fares the maximum combined Linear Length of any two pieces of checked baggage is 273cm/107in but no one piece may exceed a Linear Length of 158cm/62in - in which case the other piece may not exceed a Linear Length of 115cm/45in.
So for a 30 gram serving of protein it would cost about $1 per day. From these two samples of protein powder I found that an acceptable price range for 30 grams of protein from protein powder is between $1 and $1.50 (assuming close to equivalent protein powder quality).
Summary. 1  Daily protein intake averaged 1.5 and 1.4g/kg/d in male and female athletes, respectively (likely a bit more due to underreporting). Current recommendations are 1.3-1.8g/kg/d. 2  Protein needs do not appear to depend on body weight or amount of lean body mass.