Compare trains, buses, flights and ferries from Cardiff to Kos. From €239.03, fastest 7h 19m, with the total price and every fee shown up front.
Traveling from Cardiff to Kos costs €239.03 at the cheapest and takes 7h 19m door to door at the fastest, across 1 mode and 1 operator. The route covers 2,975 km. Cheapest is by Flight, fastest is by Flight.
Journey times below are door to door, so they include getting to the terminal and away from it at the other end. Fares are the cheapest we currently sell on September 28, 2026.
| Mode | Door to door | Moving | At the ends | From | CO2 | Per day |
|---|---|---|---|---|---|---|
| Flight | 7h 33m | 4h 23m | 3h 10m | €308.71 | 731.9 kg | 2 |
Two journeys we can sell today, with the service number each operator files them under.
Changes at Bristol, with 79 minutes between services and a walk of about 14 minutes.
Door to door 7h 59mCO2 723.4 kgChanges 1Fixed, no changes
Door to door 7h 33mCO2 731.9 kgChanges 0Fixed, no changes
Changes at London, with 64 minutes between services and a walk of about 14 minutes.
Door to door 9h 15mCO2 690.7 kgChanges 1Fixed, no changes
Live from the operators' own published timetables, through the open transit feeds they publish. Times and services are real. Fares are modeled until our booking connectors are live.
| Operator | Service | Departs | Arrives | Takes |
|---|---|---|---|---|
| GWR8 changes | GWR | 09:18 | 03:10 | 65h 52m |
| GWR5 changes | GWR | 04:07 | 06:45 | 98h 38m |
| GWR6 changes | GWR | 16:50 | 06:45 | 85h 55m |
| GWR7 changes | GWR | 20:20 | 06:45 | 82h 25m |
| GWR6 changes | GWR | 04:07 | 17:00 | 108h 53m |
| GWR8 changes | GWR | 09:18 | 06:45 | 69h 27m |
Live from our own engine, refreshed on every request. The cheapest days for each way of traveling are marked.
| Cheapest fare by mode and day for Cardiff to Kos | ThuSep 10 | FriSep 11 | SatSep 12 | SunSep 13 | MonSep 14 | TueSep 15 | WedSep 16 | ThuSep 17 | FriSep 18 | SatSep 19 | SunSep 20 | MonSep 21 | TueSep 22 | WedSep 23 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Flight | €679.23 | €541.76 | €606.66 | €430.25 | €396.03 | €424.35 | €419.63 | €429.07 | €385.41 | €392.49 | €421.40 | €316.38 | €349.42 | €308.71 |
| Train | €833.04 | €627.34 | €578.94 | €512.94 | €461.23 | €391.39 | €345.73 | €454.08 | €430.44 | €367.74 | €397.44 | €331.43 | €332.53 | €309.44 |
Cheapest day: 2026-09-28 · €239.03
The flight gets you into Kos. It does not get you a bed, and neither do we.
Sort by distance from Akteon (Center) and you can see which places are ten minutes on foot and which are not.
Search Kos 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.
The same search run across the whole booking window, so the shape of the curve is visible rather than described.
Book now Fares on this route are lowest around 60 days ahead. You are inside that window.
Median cheapest fare for each weekday, taken across the next three weeks of real prices.
The same journey priced on the fifteenth of each of the next six months.
Direct or connecting, how far the route really runs, and what happens when a connection is missed.
The stations, airports and ports each mode on this corridor actually uses.
The fare from KGS into Kos is the one price on this trip we cannot show you, because it is not ours.
A price agreed before you fly, a driver at arrivals, and a car big enough for the bags.
Book a ride from KGS 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.
Speed, flexibility and what is on board. Nothing here is a rating, because we have not earned one.
| Operator | From | Fastest | Typical speed | Flexibility | On board |
|---|---|---|---|---|---|
 Thomsonfly | €288.06 | 7h 19m | 740 km/h | Fixed fare | Not published |
Every part of the total, so the number at checkout is the number here.
| Part | Amount | Share |
|---|---|---|
| Operator fare | €215.49 | 90% |
| Taxes | €21.55 | 9% |
| Our service fee | €1.99 | 1% |
| Total you pay | €239.03 | 100% |
Kos is small enough to see in an afternoon, which is easier without the luggage. Storing it is not our business.
Priced by the bag and by the day, booked before you get there, and insured while it sits.
Check Kos on StasherOr try Bounce
Partner links. We do not run these networks. We earn a commission on a booking, and the price is the same as going direct.
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.
The fastest journey from Cardiff to Kos takes 7h 19m door to door, of which 4h 23m is spent moving, on the Flight. Most services take around 7h 41m, because that average includes slower stopping services and journeys with a connection. Times include reaching the terminal and leaving it at the far end.
The cheapest fare from Cardiff to Kos is €239.03, checked on September 28, 2026. A typical fare across the next three weeks is €393.08. Both figures are the total for one passenger, including taxes, supplier fees and our service fee, so nothing is added at checkout.
The cheapest way from Cardiff to Kos is by Flight, at €308.71 for one passenger on September 28, 2026. That journey takes 7h 33m door to door. Cheaper is rarely faster on this corridor, and the comparison table on this page shows what each mode costs against what it saves.
Fares from Cardiff to Kos bottom out around 60 days before departure, at €193.38. Across the whole booking window the gap between the cheapest and the most expensive lead time is 251 percent, measured on September 28, 2026. Booking inside the last week has consistently cost more on this corridor.
Wednesday is the cheapest day to depart from Cardiff to Kos, at €308.71. That is the median of 21 priced departure days across the next three weeks, checked on September 28, 2026. Shifting a departure by one day is usually worth more than shifting the booking by one week.
February is the cheapest of the next 6 months to travel from Cardiff to Kos, at €186.58 for one passenger. Each month is priced on its fifteenth, so the comparison is like for like rather than a mix of weekends and midweek departures.
1 operators sell services from Cardiff to Kos across 1 modes: Thomsonfly. Journey times, fares and fare conditions differ between them, and the operator table on this page compares all of them on speed, flexibility and what is provided on board.
20 percent of the services we sell from Cardiff to Kos are direct. The rest connect at Paris, London, Bristol, Birmingham, with about 63 minutes between the two services. Both legs are sold on one booking, so a missed connection is rebooked at no charge.
Services from Cardiff to Kos by Flight leave from Cardiff CWL and arrive at Kos KGS. Allow about 3h 10m in total for reaching the departure terminal and leaving the arrival one, which is already included in every door to door time on this page.
0 of the 1 operators we sell from Cardiff to Kos allow a change or a refund. A change on a changeable fare costs €5.00. The operator table on this page names which is which, and the condition is shown again before you pay.
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, Distances
The trip is the easy half to plan. The days in Kos are the half people leave until last.
Day trips that leave Kos in the morning and cover a good part of Greece by evening.
See Kos on GetYourGuideOr browse Viator
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Plan a trip from here
Ask Ori for the same corridor under a different constraint, or for a longer trip that starts on it.