One first to London, please.

请买一张去伦敦的头等票。

youdao

The story then jumps from her childhood in New York to her first visit to London.

故事接着从她在纽约的童年一下子转到她第一次去伦敦访问。

《牛津词典》

It was the first time I'd had visitors since I'd moved to London.

那是我搬到伦敦以后第一次有人来看我。

《牛津词典》

For its first trip, the submarine sailed under water from New London,Connecticut to San Juan,Puerto Rico.

VOA: special.2010.06.11

When you first came to London, how did you find a place to live?

你刚来伦敦的时候，是怎样找到一个地方住下的？

刚来伦敦的时候 - SpeakingMax英语口语达人

The government appointed five-member panel began its first public hearings in London in an inquiry expected to last until the end of 2010 and possibly beyond.

VOA: standard.2009.11.25

Time seemed to fold in on itself, and in an instant I found myself aboard my first flight to London.

WSJ: Alan Bradley on Writing About an England He'd Never Seen | Traveler's Tale

Ireland's president, Michael D Higgins, is making his first visit to London since taking office.

BBC: Irish President Michael D Higgins visiting London

Scholars believe that Shakespeare first travelled to London between 1585 and 1588, when he was around 21 years old.

BBC: Following in the Bard��s footsteps �C literally