AIRLINE · UNITED STATES
21 Air
IATA 2IICAO CSBHQ CVG
21 Air (2I/CSB) is a carrier based in United States. Its tracked network spans 21 destinations from 18 hubs, led by Cincinnati (CVG).
HUBS & TOP AIRPORTS
Operates from 18 airports
Sortable by destinations served or daily frequency. Click any column to re-rank.
TOP HUB · 01CVG
Cincinnati
Cincinnati/Northern Kentucky International Airport
11
destinations
9–10
flights/day
See routes from CVG →
TOP HUB · 02MIA
Miami
Miami International Airport
7
destinations
9–10
flights/day
See routes from MIA →
TOP HUB · 03SJU
San Juan
Luis Munoz Marin International Airport
5
destinations
3–4
flights/day
See routes from SJU →
Hubs and top airports for 21 Air, fleet and route data as of April 2026
ROUTES & DESTINATIONS
Flies to 21 cities
Pick an origin hub to see its place in the network.
DESTINATIONS
Every 21 direct destinations
Sortable by daily frequency or hubs served. Each city links to its airport.
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21 / 21
Direct destinations from 21 Air, route data as of April 2026
SIMILAR CARRIERS
Other airlines based in United States
Compare 21 Air with its largest peers in the same country.