United is the only US airline flying the 787.
The airline, based in Chicago, says it will use 787s on shorter domestic flights before resuming international flying on June 10 with a new Denver-to-Tokyo service as well as temporary Houston-to-London flights. It is adding flights to Tokyo, Shanghai, and Lagos, Nigeria, in August.
Those long international flights are the main reason the 787 exists. Its medium size and fuel efficiency are a good fit for long routes. Starting with shorter domestic flights "will give us a period to ramp up full 787 operations", the company said.
Four of its six 787s have been fixed and United said the other two would get the battery modification in coming days.
United was forced to delay planned international flights and the grounding reduced first-quarter earnings by US$11 million ($13.5 million).
Boeing never stopped making 787s, but deliveries were halted. They resumed last week.
-AP