About 4O
4O is a regional carrier built around the western Balkans, with Podgorica's Golubovci Airport (TGD) as its operational heart. With 14 non-stop routes spread across seven airports and a total network spanning just under 9,000 kilometres, this is a small airline doing a precise job: connecting Montenegro to a handful of carefully chosen European cities. It isn't chasing scale. The routes skew heavily toward Montenegro itself, which accounts for seven of the fourteen destinations, suggesting an airline that knows its core traveller well — whether that's a local heading home or a visitor pointed at the Adriatic coast.
Why fly 4O?
The honest case for 4O is specificity. If you're travelling between Podgorica and Zurich — a 1,012-kilometre hop that TGD-ZRH represents as the airline's longest route — your options through larger carriers often mean unnecessary layovers through busier hubs. 4O cuts that out. The Istanbul (IST) and Belgrade (BEG) connections add useful regional reach, particularly for travellers moving between the Balkans and Turkey who'd rather not route through Western Europe. Tivat (TIV), Montenegro's coastal airport, adds two more routes for those heading to or from the Bay of Kotor area. It's not a carrier I'd evaluate on lounges or loyalty perks — fly it because it goes where you need to go, directly.
4O hub airports
- TGD Podgorica — 5 4O routes from Montenegro
- IST Istanbul — 2 4O routes from Turkiye
- BEG Belgrade — 2 4O routes from Republic of Serbia
- TIV Tivat — 2 4O routes from Montenegro
- LJU Ljubljana — 1 4O routes from Slovenia
Top destination countries on 4O
- Montenegro — 7 4O routes
- Republic of Serbia — 2 4O routes
- Turkiye — 2 4O routes
- Slovenia — 1 4O routes
- Italy — 1 4O routes
- Switzerland — 1 4O routes
Tips for booking 4O
First-time flyers should go in with clear expectations. 4O's strength is its Podgorica hub, where five routes give you the best frequency and connectivity options. Outside TGD, the network thins quickly — two routes each from IST, BEG, and TIV means limited flexibility if plans change. Check baggage allowances carefully before booking, as regional carriers in this part of Europe tend to vary fare conditions more than the marketing suggests. I'd also recommend booking directly rather than through third-party aggregators, where fare-class conditions can get murky. Slovenia and Italy each get just one route, so those connections warrant extra scrutiny on schedule reliability before you commit.
Frequently asked questions about 4O
Where does 4O airline fly?
4O operates 14 routes primarily connecting Montenegro, the Republic of Serbia, and Turkey. The airline focuses on regional destinations across the Balkans and Eastern Mediterranean.
What is 4O's main hub airport?
4O's main hub is Podgorica Airport (TGD) in Montenegro, which serves as the airline's primary operations center.
What type of airline is 4O?
4O is a regional carrier that operates a focused network of routes connecting the Balkans and Turkey. Its limited route network and hub-based model are typical of regional airlines serving secondary and tertiary markets.
When should I book flights with 4O?
For regional carriers like 4O, booking 4-6 weeks in advance typically offers the best fares, though availability can be limited. Booking directly through the airline's website or authorized agents is recommended to ensure fare transparency.
What are 4O's baggage and check-in policies?
For specific baggage allowances and check-in procedures, passengers should consult 4O's official website or contact their booking agent, as policies may vary by fare type and route. Standard check-in typically opens 24 hours before departure.