"on the same continent" is correct and usable in written English.
It can be used to talk about two or more places that are located on the same continent. For example, "Seattle and Vancouver are both on the same continent."
Europe's countries are small, and since they are all on the same continent together, they have all been involved in trade with one another for a long time.
We went out constantly, and were never on the same continent two nights in a row.
They were soon a couple again and even living on the same continent, but barely.
The only difference was these students were neither in the same classroom nor on the same continent.
But United's habit of staging successive trips on the same continent points to another US tour next year.
In today's world of global software creation, the people who participate in any prototyping activity might not even be on the same continent.
Here, a focus is chosen upon the Mughal tradition of blowing from guns as a local tradition preceding, for example, the British tradition on the same sub-continent.
And on the same day, a continent away in Pomona, CA, Courtney Force, daughter of 15-time Funny Car champion John Force, won the Funny Car competition at the season-opening NHRA drag racing Winternationals.
Guus Hiddink believes his replacement at Chelsea will find it difficult to rebuild a squad in the summer capable of challenging Europe's best teams and concedes the club are no longer operating on the same level as the continent's elite.
A round-trip short-haul flight can only cost you 15,000 miles to fly from Canada to the continental United States and remain on the same side of the continent.
Juxtapose these two recent events that occurred on the same day a half a continent away and an ideological world apart.
