Flights Zaventem → Kos Island
As of September 2026, economy flights from Zaventem to Kos Island have a typical range EUR 253–2123, median EUR 427. Full range across all 194 offers: EUR 116–3247. We found 50% of 194 offers from budget carriers (around EUR 368) and 50% from full-service carriers (around EUR 454).
Preview snapshot — prices change. Search for live results.
Data collected by LetsFG's multi-source price checks — every airline and the major booking sites checked for this route. How we collect data →
Best offers by airline: Zaventem → Kos Island
Based on 194 offers · September 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Zaventem → Kos Island
Add-on pricing from the cheapest available offer per airline · September 2026 · EUR
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| Ryanair | Included | — | — |
| TUI Fly Belgium | — | EUR 119 | — |
| easyJet | EUR 104 | EUR 189 | — |
| Austrian Airlines | Included | EUR 35 | — |
| Aegean Airlines | Included | EUR 20 | — |
| Sky Express | Included | EUR 123 | — |
| Brussels Airlines | Included | EUR 35 | — |
| Air Serbia | Included | EUR 25 | — |
| British Airways | Included | EUR 65 | — |
| Lufthansa | Included | EUR 35 | — |
| SWISS | Included | EUR 40 | — |
Fees are estimates from the prices we checked and may not reflect your specific itinerary, booking class, or payment method. Run a live search for exact pricing.
How much do flights from Zaventem to Kos Island cost?
Based on 194 offers · September 2026
Zaventem to Kos Island flights ranged from EUR 116 to EUR 3247 across 194 offers analyzed in September 2026. Two fare clusters detected: budget fares around 273 and premium fares around 2151 The chart below shows how prices distributed across all 194 offers.
These 194 offers (September 2026) span multiple departure dates and booking windows — your travel dates may fall anywhere in this distribution. Only a live search shows where your specific trip lands.
50% of offers priced between EUR 321 and EUR 706
What hidden fees do Zaventem to Kos Island flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Zaventem to Kos Island routes. The breakdown below is based on 194 offers analyzed in September 2026.
| Carrier | Avg fee (EUR) | % of base fare |
|---|---|---|
| FR | 24 | 7% |
| TB | 84 | 29% |
| U2 | 64 | 19% |
| OS | 64 | 8% |
| A3 | 32 | 6% |
| GQ | 31 | 6% |
| SN | 42 | 4% |
| JU | 33 | 5% |
| BA | 80 | 10% |
| LH | 45 | 2% |
| LX | 52 | 2% |
TB: base ~EUR 229 + fees EUR 84 = ~EUR 313 total. Ryanair: base ~EUR 302 + fees EUR 24 = ~EUR 326 total.
TB's EUR 84 ancillary fees narrow the gap with Ryanair's lower-fee model — the EUR 73 base difference shrinks to EUR 13 after fees. Always compare total cost, not just the advertised base fare.
Estimates based on median total minus average ancillary fee. Actual base fares vary by itinerary.Fee levels vary significantly across carriers on this route — some carriers charge 50%+ above the base fare in ancillary fees.
Run your search to see itemized fees for your itineraryWhich airline is cheapest from Zaventem to Kos Island?
11 airlines flew Zaventem to Kos Island in this dataset. The route shows a clear split between low-cost and full-service carriers. Knowing the airline isn't enough — the typical fare range below shows how far prices swing on each one. Median and range include all fees we recorded.
Even on the cheapest airline (TB), fares ranged EUR 225–497 in this snapshot. Your exact price depends on your dates and how far ahead you book — run a live search to see your number →
| Airline | Offers | Typical range (EUR) | Median (EUR) | Fees (EUR) |
|---|---|---|---|---|
 TB | 54 | 225–497 | 313 | 84 (27%) |
 Ryanair | 31 | 225–521 | 326 | 24 (7%) |
 easyJet | 12 | 282–393 | 368 | 64 (17%) |
 Aegean Airlines | 20 | 420–590 | 454 | 32 (7%) |
 Sky Express | 16 | 427–765 | 515 | 31 (6%) |
 Brussels Airlines | 13 | 503–2351 | 551 | 42 (8%) |
 Air Serbia | 6 | 556–790 | 577 | 33 (6%) |
 Austrian | 13 | 321–1583 | 754 | 64 (8%) |
 British Airways | 3 | 658–925 | 818 | 80 (10%) |
 Lufthansa | 19 | 2060–2678 | 2127 | 45 (2%) |
 Swiss | 7 | 2677–2960 | 2797 | 52 (2%) |
Where do the best Zaventem → Kos Island prices come from?
We checked direct airlines, travel agencies, and meta-search for this route. On this route the lowest median came from meta-search sources, but the cheapest channel shifts by route and date — which is exactly why a live search across all of them wins.
We compare every airline and the major booking sites but never disclose which — that's our edge. Prices are the ones we observed and aren't official data from any platform. Run a live search and we bring you the cheapest, wherever it is.
Key facts: Zaventem to Kos Island flights
- Full-service carriers on Zaventem–Kos Island cost 2.9x more than budget airlines (EUR 990 vs EUR 347 median; overall median EUR 427).
- TB charges 3.5x more in ancillary fees than FR — EUR 84 vs EUR 24 avg per booking.
- The same route priced EUR 276 apart depending on where it was booked — the lowest median was EUR 318. We search every airline and the major booking sites at once so you always see that lowest price.
Frequently asked questions
- How much does a flight from Zaventem to Kos Island cost?
- Based on 194 offers analyzed, Zaventem to Kos Island flights range from EUR 116 to EUR 3247, with a median price of EUR 427. Search for your specific dates →
- What hidden fees should I expect on Zaventem to Kos Island flights?
- On average, ancillary fees (bags, seat selection) add EUR 46 to the base fare on Zaventem to Kos Island flights. See itemized fees for your itinerary →
- Which airline is cheapest on Zaventem to Kos Island including all fees?
- TB has the lowest median fare on Zaventem to Kos Island at EUR 313 (median across 54 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Zaventem–Kos Island flights?
- It depends on your dates — no single site is always cheapest. We search every airline and the major booking sites at once (travel agencies and meta-search included) and surface whichever is lowest; the best median in this snapshot was EUR 318. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Zaventem to Kos Island routes?
- Zaventem to Kos Island has 11 airlines competing, creating a price range from EUR 116 to EUR 3247 across 194 offers. There are two distinct fare clusters on this route: budget options and premium fares. Find where your trip lands in the distribution →
11 airlines, two price clusters — find which fits your budget
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