Last summer, American Airlines announced the addition of nonstop service between Phoenix and London on a seasonal basis.

While the route hasn’t even begun yet, American has already decided to expand its initial plans by announcing Thursday that daily flights will be available year-round.

The new route between Sky Harbor International and Heathrow airports launches on March 31.

In August, the plans for the additional flight were first announced and tickets went on sale soon after, while the new service was supposed to conclude on Oct. 26.

Passengers have the ability to choose between three flight classes — business, premium economy and main cabin — for the approximately 10-hour flights on a Boeing 777-200ER.

The only current carrier that provides nonstop service between Phoenix and London is British Airways.

The only domestic airline with nonstop flights from Sky Harbor to Europe is American.

“The announcement of American Airlines extending their Phoenix to London nonstop service to year-round is good news for Phoenix,” City Councilwoman Felicita Mendoza, who represents the district that contains Sky Harbor, said in a press release. “In addition to providing residents with even greater access to Europe for business and leisure travel, it will also provide a boost to our economy.”

Heathrow is the seventh-busiest airport in the world and the busiest in Europe, according to Airports Council International data.