Letters to Europe from the U.S. are best airmailed.
Examples of airmail
airmail
The real airmail paper of that day had a thousand uses if I could hang on to it.
From the guardian.co.uk
The first experimental transcontinental airmail through flight lands in Oakland.
From the en.wikipedia.org
The 24-cent airmail stamp features a biplane accidentally printed upside down.
From the chron.com
A 48-hour ban on all outgoing airmail packages from Greece remained in effect.
From the sacbee.com
In doing so I used surface mail rather than airmail and saved a lot of money.
From the ocregister.com
The dirigibles of the 1920s and 1930s also carried airmail, known as dirigible mail.
From the en.wikipedia.org
French is still seen on documents ranging from passports to airmail letters.
From the en.wikipedia.org
Ford will also consider raising the international airmail fees paid to U.S. carriers.
From the time.com
Prior to 1940, Scotts Catalogue did not have a special designation for airmail stamps.
From the en.wikipedia.org
More examples
Letters and packages that are transported by aircraft
Send or transport by airmail; "Letters to Europe from the U.S. are best airmailed"
A system of conveying mail by aircraft
Airmail (or air mail, in French Par avion) is mail that is transported by aircraft. It typically arrives more quickly than surface mail, and usually costs more to send. ...
Airmail is the second studio album by Australian rock band Epicure. It was released on October 15, 2001 . The Album is essentially a collection of Epicure's previous three EPs repackaged into one album.
Airmail is a 1932 adventure film directed by John Ford.
(AIRMAILS) Stamps issued specifically for use on airmail letters.
To hit a shot much farther than planned (most commonly over the green). Amateur golfers frequently airmail approaches to greens fronted by hazards.
Any item of mail (letters, printed matter, parcels or packages) conveyed by air at a higher priority and greater speed than surface mail.