According to the United States Postal Services' Postage Price Calculator, the postage of a letter of that weight to Switzerland can vary between $1.20 to $1.42 for first-class international mail, depending on the type of envelope used.
1.45
As of early 2014, $1.15
1.74
$1.10
us air mail postage to ukraine
.94 dollars
94 cents
airmail letter to seoul, korea
The postage is $.98. You can send a letter for the same cost.
As of early 2014, $1.15
$1.15 in any valid postage is fine. Just mark the envelope "airmail"
You can use any USPS postage as long as it is at least $0.94. Make sure to write "AIRMAIL" on the letter as well.