Air line or airline?
air line is a noun meaning “A pipe or tube supplying air or compressed air”; airline is a noun meaning “A company that flies airplanes to transport people and goods”. air line is written as two words and airline as one word; they are used differently.
What is the difference between air line and airline?
| air line | airline | |
|---|---|---|
| Part of speech | noun | noun |
| Meaning | A pipe or tube supplying air or compressed air A railroad following a very flat, straight route between two endpoints in order to minimize travel times, choosing the shortest, most direct route practical… | A company that flies airplanes to transport people and goods |
| Example | none recorded | none recorded |
| Forms | none | airlines |
| Pronunciation | not recorded | /ˈɛəˌlaɪn/ /ˈɛɹˌlaɪn/ |
| In writing | not counted (the list counts single words) | 11 times per million words |
Sources: air line and airline in the English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0); written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Every current meaning of air line and airline
air line
- 1
A pipe or tube supplying air or compressed air
- 2
A railroad following a very flat, straight route between two endpoints in order to minimize travel times, choosing the shortest, most direct route practical even if longer route that was more…
airline
- 1
A company that flies airplanes to transport people and goods
Source: the English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0); obsolete, archaic, dialect and rare senses left out.
Which is more common, air line or airline?
air line is a phrase, which the list of single words does not count; airline 11 times per million words.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How many people search air line vs airline?
“air line vs airline” is searched about 10 times a month on Bing (Google reports it together with close variants, so it has no figure of its own) in the United States.
Sources: Google Ads keyword data through DataForSEO and Microsoft Advertising keyword data through DataForSEO, the average month from September 2025 to August 2026.