It depends on the size of the postage item and the weight of it.
You can usually find a price calculator on the official website of the mail handler of your choice.
Here is the link to the UK's default mail handler's price calculator - The Royal Mail (Click).
How much is it to send a birthday card from Toronto area to London, England?
About 3.00
Sending a card to the UK will cost much more than sending one to Canada. The cost of sending a card to the UK would be about 5 to 7 dollars. Sending one to Canada will cost about 2 dollars.
Much the same as a bus from America to Canada.
$20 for USA and Canada. I'm not sure about other countries.
It depends on which country you're posting it from
It all depends on the price of postage
Under an ounce is $0.75.
£3 to buy it, then you usually have to put a pound on.
£4.99 in the UK, $6.99 in the US, and $7.99 in Canada
As we have family in England I can tell you that a letter costs double the current postal rate within Canada.
It would cost approximately $1,212.00 for a one way ticket from Canada to England. There is approximately 3,241 miles between the two locations.