Key takeaways
- Croatia Airlines is Croatia’s national airline with headquarters and hub in Zagreb and is almost entirely state-owned.
- Codes: IATA OU, ICAO CTN, callsign “CROATIA”.
- Star Alliance since 2004: The airline works closely with Lufthansa, Austrian and Swiss and uses Miles & More.
- The fleet is switching to the Airbus A220: A220-100s and A220-300s are replacing the A319, A320 and Dash 8-400 step by step.
- For spotters in Germany, Frankfurt and Munich are the most reliable places for a sighting.
Contents
Profile
| IATA code | OU |
|---|---|
| ICAO code | CTN |
| Callsign | CROATIA |
| Hubs | ZAG |
| Alliance | Star Alliance |
| Business model | National network airline with scheduled flights in Europe, domestic service and strong summer traffic to the Adriatic |
| Headquarters | Zagreb, Croatia |
| Founded | 1989 as Zagal – Zagreb Airlines, Croatia Airlines since 1990 |
| Ownership | Almost entirely owned by the Republic of Croatia |
| Hub | Zagreb Airport (ZAG); important summer stations are Split, Dubrovnik and Zadar |
| Alliance | Star Alliance since November 2004; frequent flyer program Miles & More |
| Fleet (as of fall 2026) | Airbus A220-100 and A220-300 as the backbone, plus a few remaining Airbus A319s and De Havilland Canada Dash 8-400s |
| Registration | Croatian prefix 9A-, the A220s carry registrations in the 9A-CA… series |
| Trademark | Square pattern in red and blue on the tail, modeled on the Croatian checkerboard coat of arms |
How to recognize the airline
Is that really Croatia Airlines?
- White fuselage with dark blue “Croatia Airlines” titles
- Tail with red-and-blue squares – a nod to the checkerboard pattern in Croatia’s coat of arms
- Since the new brand look, the squares also appear next to the titles and on the wingtips
- Today usually an Airbus A220: slender fuselage, large engines, noticeably short landing gear
- Registration starts with 9A-, with 9A-CA… on the A220s
- Flight number starts with OU, and the tracker shows CTN
Croatia Airlines is not an airline you see every day at one-minute intervals – and that is exactly what makes it appealing for spotters. The Croatian national airline is in the middle of a complete fleet change: a colorful mix of Airbus A319s, A320s and propeller aircraft is turning into a fleet of Airbus A220s. If you look closely now, you can still catch the last examples of the old generation next to the brand-new A220s. This page shows you how to recognize Croatia Airlines reliably and where to see it best.
Old and new fleet in your hangar
With Planetrack, you log every sighting with photo, registration, type and airline – and see at a glance which Croatia aircraft you’re still missing. Planetrack is launching soon – join the waitlist and get early access.
Croatia Airlines at a glance
Croatia Airlines is Croatia’s national airline, based in Zagreb. Its history begins in 1989 under the name Zagal – Zagreb Airlines, back then with a single twin-engine Cessna 402 flying cargo. In 1990, the company got its current name. The first scheduled flight followed in 1991 between Zagreb and Split, with a leased McDonnell Douglas MD-82. Because of the war in Croatia, operations had to be suspended for a time; the airline then built up its scheduled service with three Boeing 737s it had taken over from Lufthansa. In the late 1990s, the first Airbus A320s and A319s arrived – laying the foundation for the Airbus fleet that still defines it today.
The Republic of Croatia owns almost all of the airline. The business model is that of a classic network airline: feeder flights to Europe’s big hubs, domestic connections between Zagreb and the coast, and in summer plenty of additional traffic to the Adriatic. In 2025, according to published business figures, Croatia Airlines carried a good two million passengers.
Since November 18, 2004, the airline has been a member of Star Alliance. That puts it alongside Lufthansa, Austrian Airlines and Swiss – with which it is also linked through codeshares and the Miles & More frequent flyer program. How the three big alliances work is explained in the overview of Star Alliance, oneworld and SkyTeam.
Codes and callsigns
- IATA code OU: appears in the flight number, meaning on your ticket, boarding pass and departure board.
- ICAO code CTN: appears in the air traffic control flight plan and on most flight trackers.
- Callsign CROATIA: how the crew identifies itself on the radio, followed by the flight number.
As with many airlines, the IATA code doesn’t match the name – OU has nothing to do with “Croatia.” The ICAO code CTN is more intuitive. Why there are two code systems at all is explained in the article IATA and ICAO codes explained.
One detail matters for attribution: Croatia Airlines sells flights that partners operate, and partners sell flights operated by Croatia Airlines. On the departure board in Frankfurt, a flight to Zagreb may therefore show an LH number while actually being a Croatia A220. The tracker with the ICAO code CTN shows you who is really flying.
Reading the tracker correctly
Don’t search for “OU,” search for “CTN” – that’s how you reliably find the flights on flight radar sites. The type code also tells you in advance whether an A220 (BCS1 or BCS3), an A319 or a Dash 8-400 (DH8D) is coming. More in the guide on Flight tracking for spotters.
The fleet: farewell to the A319 and Dash 8
Until 2024, Croatia Airlines’ fleet was small and mixed: a few Airbus A319s, one Airbus A320 and several De Havilland Canada Dash 8-400 turboprops. The Dash 8s flew a large share of all flights, especially on short routes within Croatia and to neighboring countries.
In fall 2022, the airline announced it would replace its entire fleet with the Airbus A220. It thereby decided against the Embraer E2 family. Part of the aircraft comes from a direct order from Airbus, and part is leased. At the end of July 2024, Croatia Airlines took delivery of its first A220. It first flew domestically, and its first international scheduled flight went to Frankfurt on August 7, 2024 – on the same route on which the airline had flown its first international flight in 1992.
| Type | Seats | Status in fall 2026 | Spotter tip |
|---|---|---|---|
| Airbus A220-300 | around 150 | Backbone of the fleet, further deliveries open | The most common Croatia sighting, registration 9A-CA… |
| Airbus A220-100 | 127 | a few examples | Shorter version, much rarer |
| Airbus A319 | 144 | only a few still in service | Replaced by A220s by 2027, according to the airline |
| De Havilland Canada Dash 8-400 | 76 | Remaining stock, retirement under way | Turboprops have been leaving gradually since 2025 |
| Airbus A320 | 174 | retired | No longer in the fleet |
The exact numbers change with every delivery and every retirement, so we deliberately give no fixed numbers here. The direction is clear: the A220 is taking over almost everything. For short connections where the Dash 8s used to fly, Croatia Airlines additionally brings turboprops with crew from a partner into the network. What is behind this model is covered in the article Wet leasing explained.
The A220 also brought changes in the cabin: it is the airline’s first to offer Wi-Fi on board, plus USB ports at the seats. According to Croatia Airlines, the A220 burns about a quarter less fuel than its predecessors.
Don’t miss the last Dash 8
Put the Dash 8-400 or individual Croatia registrations on your wish list and get notified when they approach near you. Planetrack is launching soon – join the waitlist.
A220 or A319? How to tell the types apart
If you spot Croatia Airlines, you face a typical question: is that still an A319 or already an A220? Both are twinjet narrowbodies of similar size and wear the same livery. The differences are still easy to see once you know what to look for.
What points to the A220
- Very large engines relative to the slender fuselage
- Noticeably short landing gear, the aircraft sits low to the ground
- Nose and cockpit windows look different from the A320 family
- Large windows in the cabin
- Listed on trackers as BCS1 (A220-100) or BCS3 (A220-300)
What points to the A319
- Classic Airbus nose of the A320 family
- Smaller engines under the wings
- Taller landing gear, the fuselage visibly sits farther above the ground
- Registration outside the new 9A-CA… series
- Listed on trackers as A319
It gets harder between the two A220 versions. The A220-100 is just under four meters shorter than the A220-300 and therefore looks stubbier. In a photo, you see this best in the distance between the wing and the front door. If in doubt, the type code in the tracker or the registration, which you later compare against a fleet list, helps. The turboprop variant is easy: the Dash 8-400 is a high-wing aircraft with two propellers and a tall T-tail – you can’t confuse it with a jet. You’ll find more basics on identifying types in the article Identifying aircraft types for beginners.
How to recognize Croatia Airlines
The livery is simple yet unmistakable: white fuselage, dark blue “Croatia Airlines” titles and a tail with squares in red and blue. The pattern alludes to the Šahovnica, the red-and-white checkerboard in Croatia’s coat of arms. With the A220, the airline has carefully revised its brand look: the squares from the tail now also appear next to the titles and on the wingtips. The change is more fine-tuning than a fresh start – at first glance, old and new aircraft look very similar.
The registration starts with 9A-, the prefix for aircraft registered in Croatia. The A220s mostly follow the 9A-CA… series, while the former Dash 8 fleet carried registrations with 9A-CQ…. Many aircraft also have names of Croatian cities and regions, such as “Zagreb,” “Split,” “Vukovar” or “Zadar.” Where country codes come from is explained in the article Country codes on aircraft.
The special liveries are sought after. In recent years, Croatia Airlines repeatedly had an aircraft in Star Alliance livery in service – with a big alliance logo instead of the usual squares. If you’re looking for such an aircraft, the guide on Finding special liveries helps.
Watch out for mix-ups
Other airlines in Europe also fly the A220, for example airBaltic, Swiss and Brussels Airlines. If you have only the fuselage without the tail in the picture, the registration decides: 9A- stands for Croatia Airlines.
Check the tail
Red-and-blue squares on white – that makes the airline clear.
Determine the type
Large engines and short landing gear point to the A220, the classic Airbus nose to the A319.
Read the registration
9A- plus three letters – that lets you attribute the aircraft unambiguously.
Note it cleanly
Record the type, registration and, if legible, the name. That way your collection stays traceable even after the fleet change.
Spotting Croatia Airlines in Germany and next door
In Germany, you see Croatia Airlines most reliably at the two Lufthansa hubs. At Frankfurt Airport and Munich Airport, flights from Zagreb land regularly, in summer often supplemented by connections from the coast. In Frankfurt, the Zeppelinheim viewing platform is a good choice, in Munich the visitors’ hill. Depending on the season, the airline also serves further German destinations, such as Berlin, Düsseldorf or Hamburg.
Outside Germany, Vienna and Zurich are obvious destinations: at the spotters’ hill in Vienna or on Observation Terrace B in Zurich, you often catch Croatia Airlines between Austrian and Swiss aircraft. In Zurich, you can compare the Croatia A220 directly with Swiss’s A220s.
If you want to see the full Croatia operation, go to Croatia: Zagreb is the hub, and in summer many additional flights come to Split, Dubrovnik and Zadar. There, Croatia Airlines shares the sky with numerous leisure and low-cost airlines from all over Europe.
Good chances of Croatia Airlines if …
- you spot in Frankfurt, Munich, Vienna or Zurich
- it’s summer and the airline offers additional flights to the Adriatic
- you searched the tracker for CTN beforehand
Check beforehand if …
- you’re looking for a specific aircraft like the A319 or the Dash 8 – they’re getting rarer and rarer
- you spot at smaller German airports where Croatia flies only seasonally
Probably not a Croatia day if …
- your airport has no connection to Croatia in the current schedule
Before you set off, take a look at the runway direction in use – otherwise you’ll be standing with your telephoto lens on the wrong side. How to judge that is shown in the guide on the runway direction in use at an airport. If you’re just starting out, Plane spotting for beginners helps you get going.
Safety and rules
Photograph only from publicly accessible areas. Fences, barriers and security areas are off-limits, and drones have no business near airports. What the law says is explained in the article Is plane spotting allowed?.
Common mix-ups
- Thinking OU is a country code – OU is purely an airline identifier and belongs to Croatia Airlines.
- Thinking every A220 with a Croatia tail is an A220-300 – there is also the shorter A220-100, much rarer.
- Confusing the A220 and A319 – pay attention to engine size, landing gear height and nose.
- Equating an LH flight number with the operating airline – on codeshare flights to Zagreb, Croatia Airlines itself often flies.
- Logging the wet-lease turboprop as a Croatia aircraft – leased aircraft carry the partner’s registration and often its colors.
- Thinking Croatia Airlines is a Lufthansa subsidiary – it is a Star Alliance partner and state-owned, but doesn’t belong to the Lufthansa Group.
Keep an eye on Croatia Airlines
Follow types, registrations or special liveries and get notified on approach or landing – and post your sighting with type, registration, airport and spot. Planetrack is launching soon – join the waitlist and get early access.
Conclusion
Croatia Airlines is a small but exciting Star Alliance airline – and especially interesting right now. The switch to the Airbus A220 makes the fleet more modern and uniform, and the last A319s and Dash 8-400s are becoming real collector’s items. If you note the registration and type cleanly, you document a piece of this transition with every sighting.
In short
Croatia Airlines (IATA OU, ICAO CTN) is Croatia’s national airline and a member of Star Alliance. Recognizable by the red-and-blue squares on the tail, it now flies mainly the Airbus A220 – in Germany, you’re most likely to see it in Frankfurt and Munich.
Summary
- You recognize Croatia Airlines by the tail with red-and-blue squares and the white fuselage with dark blue titles.
- The fleet is in transition: the Airbus A220 now dominates, and the A319 and Dash 8-400 are becoming rarer – every sighting of the old types is worth it.
- You tell the A220-100 and A220-300 apart best by fuselage length and the type code in the tracker (BCS1 or BCS3).
- As a Star Alliance partner, Croatia Airlines mainly serves hubs like Frankfurt, Munich, Vienna and Zurich.
Frequently asked questions
What IATA and ICAO codes does Croatia Airlines have?
Croatia Airlines’ IATA code is OU, and its ICAO code is CTN. On the radio, the crew identifies itself with the callsign “CROATIA”. On flight trackers you therefore usually see CTN plus the flight number, while the departure board shows OU.
Is Croatia Airlines part of an alliance?
Yes. Croatia Airlines has been a member of Star Alliance since November 18, 2004. Its closest partners include Lufthansa, Austrian Airlines and Swiss; the frequent flyer program is Miles & More.
What aircraft does Croatia Airlines fly?
The backbone of the fleet is now the Airbus A220 in two sizes: the A220-100 with 127 seats and the A220-300 with around 150 seats. In fall 2026, a few Airbus A319s and a handful of De Havilland Canada Dash 8-400s also still fly. Croatia Airlines plans to replace the A319s with A220s by 2027 as well. Exact numbers change with every delivery – if in doubt, check a current fleet overview.
Since when has Croatia Airlines flown the Airbus A220?
Croatia Airlines took delivery of its first A220 at the end of July 2024. After first domestic flights, it went international on scheduled service for the first time on August 7, 2024, from Zagreb to Frankfurt. More aircraft have been joining continuously since then. The airline ordered some of the aircraft directly from Airbus and leases some.
How can I recognize a Croatia Airlines aircraft?
By the tail with red-and-blue squares recalling the Croatian checkerboard coat of arms, and by the dark blue “Croatia Airlines” titles on a white fuselage. The registration starts with 9A-, the prefix for aircraft registered in Croatia.
Where can I spot Croatia Airlines in Germany?
Most reliably in Frankfurt and Munich, Lufthansa’s two hubs, which Croatia Airlines serves regularly from Zagreb. Depending on the season, further German destinations are added, such as Berlin, Düsseldorf or Hamburg. The schedule changes noticeably between summer and winter – check it before your trip.
Does Croatia Airlines still fly propeller aircraft?
Only a few. The Dash 8-400s were the workhorse on short routes for a long time, and since 2025 Croatia Airlines has been phasing them out gradually. For short connections, the airline additionally relies on leased turboprops with another operator’s crew, in other words a wet lease.
Keep an eye on Croatia Airlines
Watch the airline or individual registrations and get notified on approach or landing – and post your sighting with type, registration and spot. Planetrack is launching soon – join the waitlist and get early access.
Aircraft types in the fleet
Airbus A220-300
Slim fuselage, huge geared turbofan engines, big windows: the A220-300 began as the Bombardier CS300 and is an everyday sight at Swiss, airBaltic and Air France. Here is how to identify it.
Aircraft typeAirbus A220-100
Short, stocky, with surprisingly big engines: the A220-100 began as the Bombardier CS100 and is getting rarer. Here is how to identify the little sister of the A220 family with confidence.
Aircraft typeAirbus A319
Short, compact and in airline service since 1996: the A319 is the shrunken member of the A320 family. Here is how to reliably tell it from the A318, A320 and A319neo.
Aircraft typeDe Havilland Canada Dash 8-400 (Q400)
High wing, T-tail, six-blade propellers and landing gear that folds rearward into the engine nacelles: the Dash 8-400 is the fastest and largest regional turboprop in scheduled service. Here is how to identify it with confidence.
Aircraft typeAirbus A320 (ceo)
The jet with which Airbus turned the short-haul market upside down: the first-generation A320 has been in service since 1988 and is still seen at almost every airport. Here is how to recognize it and its variants.
More airlines
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NetworkAustrian Airlines
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NetworkSwiss International Air Lines
The Swiss network airline with the red tail: created in 2002 from Crossair and the legacy of Swissair, today part of the Lufthansa Group and a Star Alliance member.
NetworkairBaltic
The Latvian airline with the light green tail: Riga hub, a fleet of only Airbus A220-300s and many wet-lease operations for the Lufthansa Group – plus a restructuring that shrinks the fleet significantly in 2026.
NetworkBrussels Airlines
Belgium’s network airline with a hub in Brussels: born from the legacy of Sabena, in the Star Alliance since 2009, fully part of the Lufthansa Group since 2017 – and the group’s Africa specialist.
Related airports & manufacturers
Airports, manufacturers, airline groups and alliances – who is behind them and what you should know as a spotter.
Star Alliance
The aviation alliance founded in 1997 around Lufthansa, United and Air Canada – headquartered in Frankfurt am Main and with its own special alliance livery.
ManufacturerAirbus
European aerospace company and one of the two big manufacturers of commercial aircraft – with aircraft families from the A220 to the A350.
AirportFrankfurt Airport
Germany’s largest airport and Lufthansa’s home hub: four runways, two passenger terminals and a traffic mix from regional jets to widebody freighters.
AirportMunich Airport
Germany’s second-largest airport and Lufthansa’s second hub: two parallel 4,000-meter runways in the Erdinger Moos, a Terminal 2 just for Lufthansa and Star Alliance – and, with the visitors’ park, one of the most convenient spotting places in the country.
Where to get Croatia Airlines in front of your lens
Spotting locations where this airline can be seen regularly – with vantage points, light times and coordinates.
Zeppelinheim viewing platform at Frankfurt Airport
The classic among Frankfurt’s spotting spots: from the platform at the motorway bridge near Zeppelinheim, most landings in a west wind glide in onto the south runway – free, public and a quick S-Bahn ride from Frankfurt Hauptbahnhof.
Spotting hillMunich Airport visitors’ hill (Besucherhügel)
The best-known vantage point at Lufthansa’s Munich hub: from the visitors’ hill in the Besucherpark you look out over the airport grounds from above – with its own S-Bahn stop right next door.
Spotting hillVienna Airport spotting hill
Since the observation deck on Terminal 3 closed, there is hardly a way around the spotting hill in Vienna: an earth mound built by the airport east of runway 16/34, free, accessible around the clock and with the sun behind you in the morning.
Observation deckObservation Deck B at Zurich Airport
On the roof of Dock B you stand in the middle of the action at Switzerland’s largest airport: SWISS long-haul, taxiing traffic right below you and heavy takeoffs on the longest runway. Probably Switzerland’s best-known legal spotting place – with security screening, admission and clear rules.
Related guides from the blog
- Star Alliance, oneworld, SkyTeam: the three alliances compared
- Aircraft country prefixes: registration prefixes from D- to N explained
- IATA and ICAO codes explained: decoding airports, airlines and aircraft types
- How to identify aircraft types: a beginner’s guide
- Wet lease explained: why other airlines’ aircraft fly for your airline
- Flight tracking for spotters: using ADS-B, Flightradar and more



