How Flight Distance Is Calculated For Compensation

Two passengers wait out the same three-hour delay at the same airport. One is owed €250, the other €600. The difference is not the ticket price, the airline or the reason for the delay. It is the distance of each passenger’s journey.

For compensation under EU Regulation 261/2004, flight distance is calculated by the great circle route — the shortest path between the first departure airport and the final destination on the booking — not by the actual route flown. For passengers dealing with delays, cancellations or downgrades, that single calculation decides which of the three compensation amounts applies, helps you check whether an airline’s offer is correct, and affects other rights such as care and some refund rules. When you check your flight with FlyPayout, the calculation is done for you.

This guide explains the three distance tiers, the method used to measure distance, what counts and what does not, how connections and return trips are treated, the special cases for flights within the EU, common mistakes, and why distance also decides your right to care, possible reductions and downgrade refunds, with examples of real routes from Belgrade. The rules referred to are those of EU Regulation 261/2004.

Flight Compensation Distance Tiers

Compensation by flight distance works in three tiers, set out in Article 7 of the regulation: the compensation amount is fixed at €250, €400, or €600 and is determined by the great-circle distance calculated in kilometers.

Flight	Compensation per passenger
Flights of 1,500 km or less	€250
Flights within the EU of more than 1,500 km, and all other flights of 1,500 to 3,500 km	€400
All other flights of more than 3,500 km	€600

Each passenger is entitled to monetary compensation individually, and the compensation amount is fixed regardless of ticket price. Within these flight distance compensation tiers, only one reduction exists: the airline may pay 50% if it offered a replacement flight that brought you to your final destination within a set time of your original arrival. For the longest flights, the same reduction applies when the delay at arrival is at least three but less than four hours, so €600 can become €300.

How Flight Distance Is Calculated for Compensation: The Great Circle Method

The regulation states that distances are measured by the great circle route method under Regulation EC 261/2004. A great circle is the shortest distance between two points on the surface of a sphere. On a flat map it often looks like a curve, but it is the most direct line between the two airports.

This is not the route the aircraft actually flew, the distance by road or the number of miles credited to a loyalty account, since ticket price and frequent flyer mileage are not used for compensation distance calculations. It is a fixed, geographic measurement between the airports involved, and airlines use standardized geographic measurements defined by regulation, commonly based on the Haversine formula and official aeronautical databases, which is why it produces the same result no matter how the flight was routed on the day.

Distance calculators use slightly different mathematical models of the Earth, so their results can differ by a few kilometres. For the flight from Belgrade to New York JFK, for example, published figures range from about 7,240 to 7,270 km. That difference only matters when a flight lies very close to 1,500 or 3,500 km.

How to Measure Flight Distance: What Counts and What Doesn’t

If you want to understand how to measure flight distance for a claim, three points decide the result:

• Airports, not cities. The measurement runs between airports. Between the centres of Belgrade and Paris, the great circle distance is about 1,446 km, but between Belgrade Nikola Tesla Airport and Paris Charles de Gaulle Airport it is about 1,427 km.

• The airports on your booking. Where a city has several airports, the one you actually booked counts. From Belgrade, London Gatwick is about 1,677 km away, London Heathrow about 1,706 km and London Luton about 1,714 km. All three fall into the same tier, but on routes close to a threshold the airport can make the difference.

• Your first departure and your final destination. On a journey with connections booked together, the distance runs from the first airport to the last, as explained below.

Connecting Flights: Only the Start and the End Count

For journeys with one or more connections on a single booking, the EU Court of Justice has held that compensation is based on the great circle distance between the first departure airport and the final destination, not on the sum of the individual flights (cases C-559/16, C-939/19 and C-592/20). This applies even if the disruption happened only on one of the flights.

Take a trip from Belgrade to Paris with a change of planes in Vienna. Together, the two flights cover more distance than a direct flight would. For compensation, however, only the roughly 1,427 km between Belgrade and Paris Charles de Gaulle counts, so the trip falls into the €250 tier. The delay is also measured at the final destination, as described in our guide to how delay is measured for connecting flights.

The regulation adds one more detail: for denied boarding and cancellations, the distance is measured to the last destination at which the disruption will delay your arrival. In practice, this is usually the final destination on your booking, because that is where the delay caused by the cancelled or refused flight ends. How the airline reroutes you does not change the distance: a replacement journey via another airport is still measured from your original first departure to your final destination. Journeys on separate bookings are assessed differently; see our guide to separate tickets flight compensation.

Return Trips Are Measured Separately

An outbound flight and a return flight are two separate flights, even when they are booked together, as the EU Court of Justice confirmed in case C-173/07. Each direction is therefore measured and assessed on its own, and a disruption on the way back does not borrow the distance of the way out.

Flights Within the EU Longer Than 3,500 km

One detail in the tiers is easy to miss. Flights within the EU of more than 1,500 km always fall into the €400 tier, even if they are longer than 3,500 km. Such flights exist between mainland Europe and the EU’s outermost regions. The flight from Paris Charles de Gaulle to Réunion, a French overseas department in the Indian Ocean, covers about 9,348 km, but as a flight within the EU it falls into the €400 tier for compensation.

Downgrade refunds follow a different rule for these routes. Flights between the European territory of EU countries and the French overseas departments fall into the highest band of 75%, as explained in our guide to flight downgrade compensation.

Why Distance Decides More Than the Amount

The same distance bands appear throughout the regulation. Compensation based on flight distance is only the start:

Distance band	Care starts after a departure delay of	50% reduction if a replacement flight arrives no more than	Downgrade refund
Up to 1,500 km	2 hours	2 hours late	30%
Within the EU over 1,500 km, and other flights of 1,500 to 3,500 km	3 hours	3 hours late	50%
All other flights over 3,500 km	4 hours	4 hours late	75%

Care means meals, refreshments and, where needed, a hotel, as described in our guide to meals and accommodation during a flight delay. The reduction applies only in the rerouting situations covered in our guide to your right to rerouting. For downgrade refunds, the special rule for the French overseas departments described above applies.

Example: The Same Delay, Different Rights

Two flights leave Belgrade two and a half hours late: one to Paris Charles de Gaulle, about 1,427 km, the other to London Heathrow, about 1,706 km. The Paris passengers are already entitled to meals and refreshments, because care starts after two hours on flights of up to 1,500 km. The London passengers are not yet, because their flight is in the next band, where care starts after three hours.

Example: The Same Replacement Flight, Different Amounts

Compensation based on flight distance also decides when a reduction is allowed. If a flight from Belgrade to London Heathrow is cancelled on the day of departure and a replacement flight arrives 2 hours and 40 minutes after the original arrival time, the airline may pay €200 instead of €400, because the limit for that band is three hours. On a flight of up to 1,500 km, the same 2 hours and 40 minutes would exceed the two-hour limit, and the full €250 would be due.

Three Routes, Three Tiers

Here is how flight distance is calculated for compensation on three direct routes from Belgrade, assuming each flight falls within the scope of the rules:

• Belgrade to Paris Charles de Gaulle, about 1,427 km: €250 per passenger, just below the 1,500 km threshold.

• Belgrade to London Heathrow, about 1,706 km: €400 per passenger.

• Belgrade to New York JFK, about 7,260 km: €600 per passenger, or €300 if the flight arrives at least three but less than four hours late.

Whether a particular route is covered depends on where it departs and which airline operates it. For flights within the region, see our guide on Balkan flight compensation eligibility.

Common Distance Mistakes

Errors in the distance usually push the amount down, so they are worth recognising:

• Using the road distance or the route the aircraft actually flew instead of the great circle distance.

• Measuring between city centres instead of between the airports on the booking.

• Taking only one flight of a connecting journey instead of the whole distance from the first departure to the final destination.

• Placing a long flight within the EU in the €600 tier, or assuming that the ticket price affects the amount.

An offer based on the wrong tier can cost you €150 or more per passenger, as explained in our guide on what happens when an airline offers less compensation than the law requires.

What If the Airline Uses a Different Distance?

If an airline’s offer is based on a different figure, for example the distance of only one flight of a connecting journey or the distance to a different airport than the one you booked, the method set out in the regulation prevails. The great circle distance between the airports on your booking decides the tier, whatever figure appears in the airline’s reply.

Let FlyPayout Calculate and Claim Compensation

You do not need to measure anything yourself. Because we know exactly how flight distance is calculated for compensation, when you check your flight with FlyPayout we calculate the great circle distance between the airports on your booking, apply the correct tier and check whether any reduction legitimately applies. If compensation is due, we claim it, and claims usually need basic flight details such as the flight number, together with any reasonable costs you paid and any downgrade refund, including legal steps where needed. How long this takes depends on the airline. Individual claims can take 8–12 months. Airlines usually provide a dedicated form for claims, and deadlines vary by country, often between 2 and 6 years. If an airline refuses to pay compensation, you can escalate the complaint to the national enforcement body. You do nothing further and pay only if money arrives, which is how no win no fee flight compensation works. Our guide to the most common mistakes that cause passengers to lose compensation covers other decisions to avoid.

Frequently Asked Questions

How is flight distance calculated for a journey with a connection?

As the great circle distance between your first departure airport and your final destination, not as the sum of the individual flights. This applies even if only one of the flights was disrupted.

How is flight distance calculated for a return trip?

Each direction is a separate flight and is measured on its own, from its departure airport to its destination.

Does the distance change if I was rerouted via another airport?

No. The distance is measured from your original first departure airport to your final destination, however the replacement journey was routed.

Does the actual route the plane flew matter?

No. Detours for weather or air traffic control do not change the distance used for compensation, which is always the great circle distance between the airports.

Does the ticket price affect compensation by flight distance?

No. The amount is fixed by the distance tier. A cheap ticket and an expensive ticket on the same flight give the same compensation.

Are the distance tiers the same for cancelled or delayed flights and denied boarding?

Yes. The same three tiers apply to a delay or cancellation, a flight cancellation, and denied boarding. For denied boarding, you can claim compensation if you checked in on time. For a cancellation, you can usually claim only if you were notified less than 14 days before departure. For cancellation claims and denied boarding, the distance is measured to the last destination at which the disruption delays your arrival, which is usually your final destination.

Do flights to and from countries outside the EU use the same tiers?

Yes, for flights that fall within the scope of the rules. A flight of 1,500 to 3,500 km falls into the €400 tier, and a flight of more than 3,500 km that is not within the EU falls into the €600 tier.

My flight within the EU was longer than 3,500 km. Why is the amount €400?

Because all flights within the EU of more than 1,500 km fall into the €400 tier, regardless of how long they are. The €600 tier applies only to flights of more than 3,500 km that are not within the EU.

My flight is just under 1,500 km. Could it still be €400?

Only if the great circle distance between the airports on your booking exceeds 1,500 km. Small differences between calculators rarely change the tier, but close to the threshold, the exact airports matter.

Distance Decides the Compensation Amount

Knowing how flight distance is calculated for compensation helps you see whether an offer is right, but you do not have to work it out yourself. Check your flight with FlyPayout: it is free, and you may claim flight delay compensation if you arrive 3 hours or more late after a flight disruption. Eligibility depends on certain conditions. Compensation is not owed in extraordinary circumstances such as severe weather or an air traffic control strike. If the delay reaches 5 hours, you can choose a refund instead of travelling. Check to see how much compensation may be due.

FlyPayout helps passengers claim compensation, reasonable costs and downgrade refunds for delayed and cancelled flights, denied boarding, downgrades, missed connections and an overbooked flight under EU Regulation 261/2004, UK261 and related passenger rights rules. No win, no fee: you pay only when your money is paid, and passengers generally have up to three years to claim, depending on the country.