TL;DR
Charter airlines are carriers that fly primarily for tour operators, not for individual passengers. You won't find them on Google Flights or most standard search engines — but on Aviasales you can, indirectly through OTAs. They have leased fleets, bases at tourist hubs, and operate on a contract model. The risk of filling the plane lies with the tour operator — hence last minute deals: if they can't sell all packages, they release "bare" tickets at dumping prices to avoid flying with empty seats.
Where charter airlines came from
To understand what charter airlines are, you need to go back to the 1950s. Post-war Europe was hungry for vacations — but scheduled airlines were expensive, rigid in their timetables, and served mainly business travelers. Travel agencies had the customers. They just needed a plane.
The solution was airlines flying exclusively on commission — so-called contract carriers. The first major European charter airline, Germany's Condor, was founded in 1955 as a tool for travel agencies to transport their own clients to Mediterranean resorts. Germany and Scandinavia are the cradle of mass charter tourism — which is why Condor, TUIfly, and SunExpress still hold dominant positions on routes to the Mediterranean basin, the Canary Islands, and the Red Sea.
In Poland, this market developed after 1989, when Western tourism conglomerates (TUI, Neckermann, Thomas Cook) entered the Central European market. The first true homegrown charter airline — Enter Air — was only established in 2009 and operated its first flight on April 25, 2010.
How it works — the business model
Two worlds
There are two fundamentally different operating models for charter airlines, and it's worth distinguishing them because their logic is completely different.
Captive model (vertically integrated) — the tour operator owns its own airline as a subsidiary. The best example in the world is TUI Group: simultaneously a travel agency, hotel chain owner, cruise ship operator, and operator of TUI Airways. It controls every element of the chain — from selling the holiday through the airplane seat to the hotel room keys. TUI Airways does not sell seats to external tour operators — it serves exclusively TUI's own customers.
Independent model (contract carrier) — the airline is a separate company and sells transport capacity to tour operators under the ACMI model (Aircraft, Crew, Maintenance, Insurance). This is how Poland's Enter Air works — it doesn't belong to any travel agency but signs multi-million contracts with Itaka, TUI Poland, and Rainbow Tours. It's a pure service: we have planes and pilots, you have customers — let's make a deal.
Where they get their fleet
No charter airline buys aircraft with cash. The fleet comes from two leasing mechanisms worth knowing because they explain much about why the industry is so sensitive to shocks.
Dry lease — the airline rents the aircraft itself from global lessors like AerCap or SMBC Aviation Capital, typically for 6–12 years. The airline is responsible for its own crew, maintenance, and insurance. This is the basic form of building an owned fleet — Enter Air built a fleet of dozens of Boeing 737s this way.
Wet lease / ACMI — you rent the aircraft together with crew, maintenance, and insurance. Used seasonally: when peak demand exceeds the capacity of your own fleet, you buy a ready-made aircraft with pilots from the market. The cost is significantly higher than dry lease — and this difference has killed more than one airline.
Why last minute exists
The mechanism is simple and merciless. The tour operator buys entire blocks of seats from the charter airline in advance — paying for the aircraft regardless of how many passengers fill it. Their job is to sell holiday packages (flight + hotel + transfer) before the plane takes off.
If three weeks before departure there are 40 unsold seats — the tour operator has two options: fly with empty seats (certain loss), or release "bare" airline tickets to the market at prices well below nominal. This is exactly why last minute exists — it's not a promotion, it's risk management. And that's why a last minute ticket from Warsaw to Tenerife can cost 300 PLN, because the alternative is an empty seat that's already paid for.
The world of charter airlines in 2026
Europe — bastion of traditional charter
Europe is the world's largest charter tourism market and that isn't changing. The logic is simple: tens of millions of Germans, Poles, Scandinavians, and Britons want to fly to warm countries every year, and scheduled airlines don't always serve routes from small regional airports directly to Turkish resorts.
TUI Airways (United Kingdom) — the largest charter airline in the UK, 100% captive for TUI Group. Serves long-haul routes: Caribbean, Red Sea, Maldives, Cape Verde. Modern widebody and narrowbody fleet. Completely closed model — not a single seat outside the TUI network.
TUIfly (Germany) — TUI Group's internal airline for the German market, focused on short- and medium-haul routes to the Mediterranean basin, Egypt, and the Canary Islands. In 2025, it operated over 300 flights per week from Germany.
Condor (Germany) — the oldest charter airline in Germany, founded in 1955. For decades part of Thomas Cook Group. After Thomas Cook's collapse in 2019, Condor survived as an independent entity — briefly under LOT's management (contract signed but withdrawn in 2020 due to COVID), ultimately acquired by the Attestor Capital fund. Mixed fleet: Boeing 767 on long-haul routes and Airbus A320/A321 in Europe. The only airline from the entire Thomas Cook Airlines group that survived.
SunExpress — a joint venture between Lufthansa and Turkish Airlines, specialized in tourist flows between Europe and Turkey and more broadly in routes to the Eastern Mediterranean. Network from Germany, the Netherlands, and Austria to Turkish resorts. An interesting hybrid model: combines charter flexibility with scheduled flight timetables.
Sunclass Airlines (Scandinavia) — emerged from the ruins of Thomas Cook Airlines Scandinavia, which after the group's bankruptcy in 2019 was bought by new investors and renamed. Serves the Scandinavian market — Denmark, Sweden, Norway, Finland — on routes to warm resorts.
French bee (France) — an interesting case of an LCC and long-haul charter hybrid. Owned by private Groupe Dubreuil. Routes: Paris-Orly → Réunion, French Polynesia, USA. Fleet exclusively Airbus A350-900. Not a classic tour operator charter — sells directly to consumers but positions itself price-wise below Air France. Popular on Aviasales when searching for transatlantic routes from France.
North America — the end of the Sunwing era
In the North American market, the most important change in recent years is the absorption of Sunwing by WestJet. In 2025, Canadian charter airline Sunwing — for years dominant on routes to Cuban and Mexican resorts — ceased independent operations. Its route network and aircraft were transferred under WestJet's operating certificates. For passengers, the difference is minimal: same routes, similar prices, but now under the banner of a scheduled carrier with a larger network and better loyalty program.
This illustrates a broader trend: the line between charter and scheduled airlines is gradually blurring. LCCs have taken over cheap tourism, so traditional charters either join larger group structures or look for niches that low-cost carriers don't cover.
Asia and the Middle East — an emerging market
Asia is the new frontier for charter tourism. Vietravel Airlines (Vietnam) is an example of a modern airline built with organized tourism in mind for Asia's rapidly growing middle class. With GDP growth and urbanization in Southeast Asia, the charter model has strong years ahead.
The Polish scene: Enter Air and Buzz
Enter Air — how to build a market dominator
Enter Air adopted from the start a pure contractor strategy — zero direct sales to consumers, exclusively ACMI and wet-lease for tour operators. A unified fleet (exclusively Boeing 737) is the key to low maintenance costs — technicians know one aircraft family, parts are interchangeable, training is cheaper.
The company is listed on the Warsaw Stock Exchange (GPW). It is the exclusive contract carrier for Itaka, TUI Poland, and Rainbow Tours. In 2023, Enter Air established the joint venture Fly4 (51% Enter Air, 49% TUI Beteiligungs) — the company is beginning to sell transport capacity not only to Polish tour operators but to the entire European market. This is an expansion from national to European scale.
Buzz — Ryanair's bee
Buzz is a Polish company of Ryanair Holdings with an interesting naming history: it started as Magic Sun (2017), then Ryanair Sun (2018), and since October 2019 operates as Buzz — hence the bee on the tail. Hybrid model: charter flights for tour operators in summer, wet-lease for the Ryanair network on scheduled routes off-season. Bases in Warsaw and Krakow, expanding to Lithuania and Slovakia. A good example of how a major scheduled player (Ryanair) utilizes human and machine resources in the low season through a charter entity.
Case Study #1: Thomas Cook — how 178 years of history ended overnight
In September 2019, Thomas Cook Group — a company founded in 1841, a pioneer of organized tourism, serving 22 million passengers per year — declared liquidation. Not restructuring, not bankruptcy with an exit option. Liquidation.
150,000 British citizens were stranded abroad overnight without a return ticket. The UK's CAA launched Operation Matterhorn — the largest civilian repatriation operation in British history, bigger than the operation after Monarch Airlines' collapse in 2017. 40 aircraft from various airlines spent two weeks bringing stranded passengers home.
The collapse mechanism was classic for the travel industry: £1.6 billion in debt, a changing market (more and more people booking directly online), the 2018 European heatwave that reduced demand for foreign travel, Brexit uncertainty blocking bookings, and finally banks demanding an additional £250 million in security at a moment when the company was already on the edge.
Condor — Thomas Cook's German subsidiary — was the only one to survive, receiving a bridge loan from the state of Hesse and the federal government. The rest of the group's airlines (Thomas Cook Airlines UK, Thomas Cook Airlines Balearics) ceased to exist.
The lesson is brutal: even 178 years of tradition and 22 million passengers per year don't protect against a debt spiral combined with bad weather and bad political timing.
Case Study #2: Small Planet Airlines — how to kill a company with your own success
A Lithuanian charter airline with a Polish division. In 2017, the leader of the Central European market with almost 30% share and 1.3 million passengers carried. Within 11 months — on the brink of bankruptcy.
The collapse mechanism was elementary: the company wanted to grow too fast, ordered new aircraft from AerCap for the 2018 summer season, but the supplier delayed deliveries. Small Planet had to lease replacement aircraft on the wet-lease market just before the peak summer season — at the most expensive possible moment, when every available aircraft is already booked.
Operating costs diverged from revenues. One bad season was enough to destroy cash flows. Official bankruptcy in 2020.
Lesson: in charter aviation, the fleet is everything. One missing aircraft at peak season and you're buying it on the spot market at triple the price — and that can be the end.
Why you can't see them in search engines
This is one of the more confusing aspects of this industry. You enter a route in Google Flights, Azair, Skyscanner — and Enter Air or Buzz don't appear. As if they didn't exist.
The reason is technical. Standard flight aggregators rely on GDS (Amadeus, Sabre, Galileo) — distribution systems through which scheduled airlines sell seats to agencies and platforms. Tour operators keep their booking systems entirely outside GDS — these are internal databases of their own holiday packages.
The path through which available charter seats reach individual passengers looks like this:
Tour operator (Itaka / Rainbow / TUI) reports available seats → charter airline (Enter Air / Buzz) → the feed of available seats goes to selected OTAs (eSky, Tripsta, and others) that have agreements with tour operators → OTA lists these seats through its API → Aviasales and other metasearch engines index them.
That's why Enter Air appears on Aviasales — not through direct GDS integration, but indirectly through OTAs. And that's why the same route can be on Aviasales but not on Google Flights.
Where and when to buy
Where
Directly from tour operators offers the widest selection of available seats — biletylotnicze.itaka.pl, Rainbow Tours, TUI.pl. Chartershop.pl is one of the few Polish aggregators focused exclusively on charters. eSky.pl has a dedicated charter section. Aviasales indirectly through OTAs — often surprising deals, especially on eastern routes.
When
Two optimal price windows: early booking (6–12 months before departure) — agencies reward early buyers because they need cash flow before the season. And last minute (0–21 days before departure) — the tour operator sells off unsold packages at 40–70% discounts.
The worst time price-wise: 6–10 weeks before departure. Early bookers have already reserved, last minute hasn't started yet — you pay full price.
Where is the line between charter and scheduled
This question is increasingly difficult to answer. LCCs like Ryanair and Wizz Air have taken over cheap tourist routes that once belonged to charters. Ryanair — through its Polish subsidiary Buzz — itself enters the hybrid charter/wet-lease model.
On the other hand, "scheduled" airlines like French bee sell directly to consumers at prices typical of charters. TUI Airways has scheduled flight numbers in GDS but serves exclusively its own network's packages.
The boundary is fluid and increasingly irrelevant to the passenger. The more important question is: does this flight serve my route, on my date, at a price I accept? And the answers to that question — as we saw in the previous article — we search for on several platforms simultaneously.