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21 Air (2I/CSB) is a carrier based in United States. It operates 12 aircraft across 2 types in our latest fleet data. Its tracked network spans 17 destinations from 15 hubs, led by Cincinnati (CVG).
21 Air
12 aircraft in service2 aircraft types17 destinations
OPERATING AIRPORTS
Operates from 15 airports
Sortable by destinations served or daily frequency. Click any column to re-rank.
TOP AIRPORT · 01CVG
Cincinnati
Cincinnati/Northern Kentucky International Airport
10
destinations
11–12
flights/day
See routes from CVG →
TOP AIRPORT · 02MIA
Miami
Miami International Airport
5
destinations
9–10
flights/day
See routes from MIA →
TOP AIRPORT · 03SJU
San Juan
Luis Munoz Marin International Airport
4
destinations
3–4
flights/day
See routes from SJU →
Airports and bases for 21 Air, route snapshot checked September 2, 2026
FLEET
21 Air aircraft
Checked August 2026
Boeing 12Narrowbody 1Widebody 11
21 Air fleet by aircraft type, fleet data as of August 2026
| AIRCRAFT TYPE | MFR | BODY | IN SERVICE ↓ | SEAT MAPS |
|---|---|---|---|---|
| Boeing | Widebody | 11 | — | |
| Boeing | Narrowbody | 1 | — |
ROUTES & DESTINATIONS
Flies to 17 cities
Pick an origin airport to see its place in the network.
DESTINATIONS
Every 17 direct destinations
Sortable by daily frequency or origin airports. Each city links to its airport.
⌕
17 / 17
Direct destinations from 21 Air, route snapshot checked September 2, 2026
MORE AIRLINES
Airlines based in United States
Data notes and methodology
Fleet totals include corrected aircraft currently in service. Order counts are withheld while source data is revalidated; schedule-derived facts use the latest captured timetable window.
Common questions
Which airports does 21 Air operate from most often?
In FlightQ's recent schedule data, 21 Air has the most departures from Cincinnati (CVG), Miami (MIA), San Juan (SJU). These are observed operating airports, not a claim about officially designated hubs.
How large is 21 Air's fleet?
21 Air operates 12 aircraft across 2 types in FlightQ's corrected in-service fleet data.
What aircraft does 21 Air fly?
21 Air operates Boeing 767-300ER, Boeing 757-200.
How many destinations does 21 Air fly to?
21 Air serves 17 direct destinations based on recent route data.