Choosing a Shipping Line Without Guessing
Line selection is a trade between four variables: price, transit time, customs friction and prohibited items. The cheapest line is rarely the best on all four, and the fastest line is rarely the cheapest.
A practical method: list the lines that accept your items, sort by published transit average, then compare the total for your actual weight — including volumetric. If two lines are within 10% on price, choose the one with the better tracking and the better complaint profile.
What you should not do is choose by the headline rate and discover the surcharge at the counter.