It costs the same to send a letter anywhere in the US to anywhere in the US. The current price of a first class stamp is 42 cents. So, it will cost you 42 cents from California to Iowa.
The required postage for a first class letter from California to Florida is one stamp. As of 2014, a stamp costs approximately $0.49.
The price is 98 cents to mail an ordinary 1-ounce letter .
1st class postage stamp at this time is .42. (as of May 2008)
A first class postage stamp is 44 cents.
One. A standard .44¢ postage stamp.
29
3cents
50
It was $0.33 for a first class postage stamp.
Postage to Europe from the US is 98 cents for a one-ounce letter.
The price of one US postage stamp sufficient to mail a one ounce letter to any destination within the US is $0.44. That price is likely to increase soon. Note also that there are a great variety of US postage stamps available for various purposes. You can buy a single stamp with a value of $0.01, but you can also but a single stamp with a value of $7.80, $10.00, even more.
The current US postage stamp price is 46 cents. To send a letter by post, one will have to pay 46 cents for the first ounce and another 20 cents for each additional ounce.