Currently, 34 cents.
As of right now (August 2008), postage for a postcard from Quito, Ecuador to the US is $1.56
44 cents
As of July 2011, the rate is $0.29.
postage for a postcard sent from Australia to the U.S. costs AU$1.40.
98 cents
To mail a first class international postcard to Canada, you will need to attach $1.10 in postage. The maximum size for a postcard is 6" in length x 4.25" in height.
USPS.com says it costs 98 cents to send a postcard from the US to Australia.
The postage rate for a standard postcard in the US is 32 cents.
For a postcard that is 6 inches long by 4 and 1/4 inches high, first class postage in the US is 27 cents as of June 2008.
27
The postage for a postcard is valued at $0.33 as of 2014. This can vary depending on the size of the postcard and may change as the Postal Service changes its rates.
As of May 2011 any postcard over 4.25"x6" and less than 6.13 x 11.5" is considered regular First Class and is $0.44