The cheapest way to move across the country is almost always the one where you do the loading and someone else does the driving, or you do both. The more labor you hand off, the more you pay. Here is the ladder, from least expensive to most.
The biggest lever is how much labor you keep. After that, it is weight and volume. Movers and freight carriers price largely by how much stuff you haul, so the fastest way to cut a long-distance bill is to own less of it on moving day.
A rental truck's headline rate is not the whole bill. On a one-way cross-country move you also pay for fuel, and a big truck drinks it. Add possible mileage charges, a one-way drop fee, tolls, a night or two of lodging on a multi-day drive, and the dolly and pads. Pencil those in before you crown the truck the cheapest option. Once the driving costs pile up, a container can land surprisingly close.
If you do hire movers, use the Federal Motor Carrier Safety Administration's Protect Your Move resources to confirm the company is registered and read up on deposit and hostage-load scams. A lowball quote from an unregistered broker is not a bargain.
Renting a truck and driving it yourself is usually the lowest total cost, often $1,500 to $3,500 with fuel. A moving container is the next step up and saves you the driving. Full-service movers cost the most because they handle everything.
Keep the labor yourself, then cut weight. Declutter before you pack, move midweek in the off-season, get free boxes, and compare at least three quotes for the same route. Each one chips away at the total.
If you are downsizing or your furniture is inexpensive, shipping a few boxes and rebuying basics can beat paying to haul everything across the country. Run the numbers on the heavy, low-value items first; those are the ones that cost the most to move and the least to replace.
For most people, no. The federal moving-expense deduction was suspended for tax years 2018 through 2025 except for active-duty military members moving on orders. Check the current IRS rules for your year and situation before counting on a deduction.

Chris Terry edits and publishes at Encore Editorial. He has spent years covering business finance and consumer markets, with a focus on making complicated cost decisions easier to think through.