About OI
OI is a regional carrier operating entirely within Australia — all 42 of its non-stop routes connect Australian airports, which tells you exactly what kind of operation this is. Think thin-route, remote-community flying rather than trunk routes between major cities. Its main hub sits at Horn Island (HID), a small airport serving the Torres Strait off the northern tip of Queensland, with nine routes radiating outward from there. Secondary operations run through Cairns (CNS) and a couple of smaller bases including Badu Island (BDD) and Edward River (EDR). This is the kind of airline that exists because roads don't.
Why fly OI?
Honestly, for most travelers reading a flight search site, OI isn't a choice — it's the only option. That's not a knock; it's the whole point. If you're heading anywhere in the Torres Strait or remote Cape York Peninsula, OI is likely your sole connection to the outside world. The HID hub gives it strong coverage across nine routes in that cluster alone, and the CNS connection at Cairns means you can hook into the broader Australian network from there. The longest route, IRG to CNS at 525 km, is practically a long-haul by regional standards. For researchers, health workers, Indigenous community members, and the occasional adventurous traveler, this airline's value isn't about perks — it's about access.
OI hub airports
- HID Horn Island — 9 OI routes from Australia
- CNS Cairns — 5 OI routes from Australia
- BDD Badu Island — 2 OI routes from Australia
- EDR Edward River — 2 OI routes from Australia
- GIC Boigu Island — 2 OI routes from Australia
Top destination countries on OI
- Australia — 42 OI routes
Tips for booking OI
Book as early as you can — capacity on remote Queensland routes is tight and fares don't tend to drop closer to departure the way they might on competitive routes. CNS is your best connecting point into the OI network if you're flying in from elsewhere; it has proper terminal facilities and onward connections on other carriers. Don't expect lounge access, frequent flyer earning, or alliance benefits — this isn't that kind of airline. Baggage allowances on small regional aircraft are almost always restrictive, so check carefully before you pack. And if your connection matters, build in a buffer day. Weather in the Torres Strait is not a suggestion.
Frequently asked questions about OI
Where does OI (OI) operate flights?
OI operates 42 routes primarily serving Australia and the surrounding region. The airline focuses on connecting major Australian cities and regional destinations across the country.
What is OI's main hub airport?
OI's main hub is Horn Island Airport (HID), which serves as the airline's primary operational center for flights across its network.
What type of airline is OI?
OI is a regional carrier operating a focused network of routes primarily within Australia. The airline specializes in connecting regional and secondary cities with efficient point-to-point service.
When should I book flights with OI for the best fares?
Booking 4-6 weeks in advance typically offers better fares on OI flights. Midweek departures and off-peak travel dates generally provide lower prices than weekend or holiday travel.
What should I know about baggage and check-in with OI?
Check-in typically opens 24 hours before departure, with online check-in available through OI's website or mobile app. Baggage allowances vary by fare class, so review your specific booking details for carry-on and checked baggage limits.