United's 767 Is 30 Years Old. It's Also One of Their Most Profitable Aircraft.

Thirty years old — and United's scheduling team just put it on tomorrow's transatlantic departure.

United isn't sentimental. They're doing math.

The capital cost equation is brutal in the 767's favor. A fully-depreciated airframe carries near-zero book value. Its economics reduce to two variables: fuel burn and maintenance. A new narrowbody delivery, by contrast, arrives with a nine-figure price tag and fifteen years of depreciation charges baked in before it turns a dollar of profit. On paper, the old jet wins before it even pushes back.

But the more important number isn't the airframe's age — it's 23. That's how many LD2 cargo containers fit in a 767's belly hold. No current narrowbody flying United's transcon or transatlantic network comes close to that volume. When cargo yields are strong, that underfloor space isn't a bonus — it's a second revenue stream on every single flight.

This reframes what the 767 actually is. It's not a passenger aircraft United can't afford to replace. It's a freight platform that happens to carry passengers in the tubes above the wing. The cabin generates yield. The belly generates yield. The airframe costs almost nothing on the balance sheet. Nothing flying off a new-delivery line right now does all three simultaneously.

Delivery constraints have sharpened the logic further. With 787 and 777X programs running behind schedule, United has no replacement waiting at the gate. Retiring a 767 early doesn't free up a slot — it creates a hole.

So the oldest widebody in the fleet keeps flying. Not because United can't let go, but because the numbers keep telling them not to.