「国際的な」という意味のinternationalが航空界では「国際線」の意味で使われます。
空港に行くと看板にinternationalと書かれていますね。
逆に国内線はdomesticと言います。
This is the terminal for international flights.
「ここが国際線のターミナルです」
のように「飛行」を意味するflightsと一緒に使うことも多くあります。
ご参考になれば幸いです。
My flight to Germany leaves from the international departures terminal.
I have an intercontinental flight from London to New York booked.
I will be flying overseas for my holiday this year.
The first phrase uses the term "international", which denotes that the flight will leave one country and land in another.
The second phrase makes it clear that the flight being taken will travel from one continent to another, for example Europe to North America, rather than country to country.
The third phrase is more conversational and less precise, and expresses travel to a foreign country, especially one across the sea.
An international flight is a flight between two different countries.
This term is used on the signs in airports.
When talking to someone about your flight, you do not need to specify and use the term "international flight" or "domestic flight". You can simply say where you are flying to.
Example: I have a flight to Canada tomorrow.
I have a flight to Tokyo tomorrow.
An international flightとは、2国間のフライトのことを指します。
これは、空港の看板に使われています。人とフライトのことを話しているときは、具体的に "international flight"（国際線）や "domestic flight"（国内線）という言葉を使う必要はありません。どこまで行くのかを伝えるだけで十分でしょう。
例：
I have a flight to Canada tomorrow.
（明日カナダ行きのフライトに乗ります。）
I have a flight to Tokyo tomorrow.
（明日東京行きのフライトに乗ります。）
If you are wondering what to call a flight that goes from different countries to another different country and not within the same country, you can call it an "international flight". This means that these flights only go from one country to another, not within the same country.
EG: "Melbourne airport has three domestic terminals and a separate terminal for international flights."
EG: "Although the pilot had conducted many domestic flights, he was nervous as this was his first time flying internationally."
Flights that travel within a country's cities are referred to as 'domestic' flights. Domestic itself has a similar meaning to 'home', such as domestic work being home around the house, or domestic animals being those humans keep in the home.
On the other hand, flights which journey from one country to another are known as "international" flights, international literally meaning outside of the current nation.
EG:
"Melbourne airport has three domestic terminals and a separate terminal for international flights."
"Although the pilot had conducted many domestic flights, he was nervous as this was his first time flying internationally."
国内線のことを 'domestic' flightsと言います。 Domesticは、'home'（家）と同じような意味で、domestic workは、家、家の周りでの仕事のこと、 domestic animalsは家で飼うペットのことを指します。
一方、国際線のことを"international" flightsと言います。 internationalは字のごとく今いる国の外という意味です。
例：
"Melbourne airport has three domestic terminals and a separate terminal for international flights."
（メルボルン空港は、3つの国内線ターミナルと離れた国際線ターミナルがあります。）
"Although the pilot had conducted many domestic flights, he was nervous as this was his first time flying internationally."
（パイロットはたくさんの国内線を運航していても、国際線は初めてなので緊張した。）
Flights that leave a country into another are usually referred to as "international" flights.
You can use this term in the following ways:
-I have been on several international flights because my work requires me to travel abroad.
他の国行きのフライトのことを "international" flightsと言います。
以下のようにこの言葉を使うことができます。
-I have been on several international flights because my work requires me to travel abroad.
（私の仕事には海外出張があるので、国際線に何回か乗ります。）
The word, "International," ( in ter nash an al ) refers to anything that comes from a country that isn't your own. This can be used for flights between countries but can be used for many other things as well.
Example sentences :
- This is an international Flight from Japan to Singapore.
- I work for an international company.
"International"（国際的な）は、自分の国以外の国から来たもののことを指す言葉です。これは国際線を表すときにも使うことができますが、それ以外のものにも使うことができます。
例文：
- This is an international Flight from Japan to Singapore.
（こちらは、日本からシンガポールへの国際線です。）
- I work for an international company.
（私は、国際企業に勤めています。）
日本 
アメリカ合衆国 
イギリス 
カナダ 
オーストラリア 
南アフリカ 
