Cheapest€34.95
- Aegean Airlines AA754909:0852m10:00Kos KGSAthens ATH
Door to door 4h 2mCO2 85.4 kgChanges 0Fixed, no changes
Kos to Athens flight
Flights from Kos to Athens start at €37.31 and take 4h 1m at their fastest.
The Flights from Kos to Athens starts at €37.31 and takes 4h 1m door to door, run by 3 operators over 347 km, with around 19 departures a day. Fares bottom out about 60 days before departure.
- 4h 1mDoor to door
- 51mMoving
- €37.31From
- 85.4 kgCO2
The cheapest and the fastest on September 29, 2026
Two journeys we can sell today, with the service number each operator files them under.
Fastest€43.21
- Sky Express SE583406:1751m07:08Kos KGSAthens ATH
Door to door 4h 1mCO2 85.4 kgChanges 0Fixed, no changes
Airlines
Speed, flexibility and what is on board. Nothing here is a rating, because we have not earned one.
| Operator | From |
|---|---|
 Aegean Airlines | €34.95 |
 Sky Express | €37.31 |
 Olympic Airlines | €34.95 |
That is the traveling done. What happens after you walk out into Athens is not something we sell.
Where to stay in Athens
Hotels and apartments near downtown, most of them with free cancellation, on a map that shows what is walkable.
Search Athens on Booking.comOr compare on Expedia
Partner links. We do not sell accommodation. We earn a commission when a booking completes, and it never changes what you pay.
When to book Kos to Athens
The same search run across the whole booking window, so the shape of the curve is visible rather than described.
- €33.7790 days
- €32.5960 days
- €38.4945 days
- €34.9530 days
- €37.3121 days
- €37.3114 days
- €43.217 days
- €60.913 days
- €76.841 days
- Cheapest lead time
- Fares bottom out around 60 days ahead, at €32.59.
- How much it moves
- The gap between the cheapest and most expensive lead time is 136 percent. The most expensive point is €76.84, 1 days out.
- What that means
- Today sits inside the cheap window, which closes about 60 days before departure. Waiting from here has usually cost money on this corridor rather than saved it.
Which departure day costs least
Median cheapest fare for each weekday, taken across the next three weeks of real prices.
- €47.34Sun
- €41.44Mon
- €42.62Tue
- €37.31Wed
- €51.47Thu
- €47.93Fri
- €50.88Sat
Where you leave from and where you arrive
The stations, airports and ports each mode on this corridor actually uses.
Kos
Air
- KGS
Athens
Air
- ATH
What the journey actually looks like
Direct or connecting, how far the route really runs, and what happens when a connection is missed.
- Direct or connecting
- 86% of the services we sell on this corridor run through without a change. The remaining 14% involve one connection.
- How far it really runs
- The route covers 347 km against 337 km in a straight line, a detour of 3 percent. Track and road geometry account for the difference.
- Where the change is
- Connections are made at Bodrum, Irákleion, Chaniá. The gap between arriving and leaving is 53 minutes, of which about 14 is walking.
- If the connection is missed
- The tightest connection we sell here has a 18 percent chance of not being made on the timetable alone. Part of this journey is a self transfer between separate tickets, so leave more time than the minimum and expect to check in again.
- First and last departure
- The first service of the day leaves Kos at 06:17 and the last at 19:45, across 19 departures. The return direction keeps its own timetable, so the times back are not these times reversed.
Questions about Kos to Athens
The questions people actually ask about this trip, answered from the same prices and times the page above is built on rather than written once and left to go stale.
How long does the Flight from Kos to Athens take?
The Flight from Kos to Athens takes 4h 1m door to door, of which 51m is spent moving. The route runs 347 km. The difference between the two times is reaching the terminal and leaving it at the far end, which every time on this page includes.
How much does the Flight from Kos to Athens cost?
The Flight from Kos to Athens starts at €37.31 for one passenger, checked on September 29, 2026. A typical fare is €43.80. Both are the total including taxes, supplier fees and our service fee, so the price here is the price at checkout.
Who runs the Flight from Kos to Athens?
3 operators run the Flight from Kos to Athens: Aegean Airlines, Sky Express, Olympic Airlines. Between them they file around 19 departures a day. The operator table on this page compares them on fare, journey time, cruising speed, fare conditions and what is provided on board.
Which terminal does the Flight from Kos to Athens use?
The Flight from Kos to Athens leaves from Kos KGS and arrives at Athens ATH. Allow about 3h 10m for reaching the departure terminal and leaving the arrival one. That time is already inside every door to door figure quoted on this page.
When should I book the Flight from Kos to Athens?
Fares for the Flight from Kos to Athens bottom out around 60 days ahead, at €32.59. The gap between the cheapest and most expensive lead time across the window is 136 percent, measured on September 29, 2026. Booking inside the final week has consistently cost more.
How much CO2 does the Flight from Kos to Athens produce?
The Flight from Kos to Athens produces about 85.4 kg of CO2 per passenger over 347 km, which works out at roughly 246 grams per passenger kilometer. That figure is for the whole journey and for one traveler, not for the vehicle.
Where these numbers come from
Observed service A carrier record shows this named operator serving this named pair, and we carry that through unchanged.
Schedules, seat counts and fares are generated by our own model until the supplier contracts are signed. Places, coordinates, operators, which operator serves which pair, and every distance are real. We would rather say that on every page than let a modeled number pass for a filed one.
Defined in full at Door to door, Fares, The booking window, Carbon
- On this page
- Every figure above was computed for Kos to Athens on September 9, 2026: 347 km of route against 337 km in a straight line, 19 services a day, 3 operators, a cheapest fare of €37.31, and 4h 1m door to door on the fastest mode. The return direction is computed separately and its numbers are not these numbers.
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ATH is not in Athens, and the drive in from it is the part of the trip nobody plans. We sell the flight and stop at the terminal door.
Getting from ATH into Athens
A price agreed before you fly, a driver at arrivals, and a car big enough for the bags.
Book a ride from ATH with Welcome PickupsOr check Daytrip
Partner links. We do not operate transfers. We earn a commission on a booking, and the fare is the same as going direct.