United charges a fee for direct mile transfers between member accounts, and for large amounts it stings — one traveller looking to top up 45,000 miles for an upgrade was quoted more than $700. The workaround? Free, and it has been verified repeatedly by other members, including two separate reports in August 2026.

The trick exploits how United's mileage pooling works. Launched in March 2024, pooling lets up to five people combine miles into a shared balance — handy when nobody has enough alone for the award they want. But the mechanics of shutting a pool down are where the money gets saved.

Here's the key rule: when a member leaves a pool, the miles they contributed stay behind. When the pool leader dissolves the pool, whatever is left is split equally among everyone still in it. So if the leader is the only member remaining at dissolution time, they get the entire balance.

That means you can engineer a free transfer. The person who should end up with the miles creates the pool as leader. The other person accepts the invitation, waits 72 hours, contributes their miles, then waits a further 24-hour pending period before leaving the pool (each member must leave from their own account — the leader can't remove them). Once alone, the leader dissolves the pool and collects everything. Compare the alternative: with 100,000 miles in a two-person pool, dissolving normally splits it 50,000 each. Have your spouse exit first and you keep all 100,000. Budget at least four days for the waiting periods.

Why bother rather than just spending pooled miles? Pooled miles have limits — notably, they can't be used for upgrades, which is exactly what the original traveller needed. Meanwhile, United has made pooled balances more flexible: since June, most partner awards are bookable from a pool, and members with better award pricing can redeem at their own rates directly from the shared balance.

Two caveats worth knowing. After a pool dissolves, everyone involved — leader included — should expect a 90-day cooldown before joining or starting a new pool, and a pool can't add new members within 90 days of someone leaving. And because this method sidesteps transfer fees entirely, it's fair to assume United may close the loophole at some point. If you have a transfer in your future, don't sit on it.