Cheapest€31.41
- CityJet CJ967706:2249m07:11Saint Helier JERCardiff CWL
Door to door 3h 59mCO2 67.4 kgChanges 0Fixed, no changes
Saint Helier to Cardiff flight
Flights from Saint Helier to Cardiff start at €36.72 and take 3h 59m at their fastest.
The Flights from Saint Helier to Cardiff starts at €36.72 and takes 3h 59m door to door, run by 1 operator over 274 km, with around 5 departures a day. Fares bottom out about 45 days before departure.
- 3h 59mDoor to door
- 49mMoving
- €36.72From
- 67.4 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.
Lowest CO2€45.57
- Loganair L481707:3042m08:12Saint Helier JERExeter EXT
- South Western Railway SW878509:2547m10:12Exeter CentralCardiff Central
Changes at Exeter, with 73 minutes between services and a walk of about 14 minutes.
Door to door 4h 39mCO2 53.5 kgChanges 1Fixed, no changes
Airlines
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 |
|---|---|---|---|---|---|
 CityJet | €31.41 | 3h 56m | 740 km/h | Fixed fare | Not published |
The flight gets you into Cardiff. It does not get you a bed, and neither do we.
Where to stay in Cardiff
Filter by neighborhood and by nightly price, and the map tells you what is a walk and what is a cab.
Search Cardiff 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 Saint Helier to Cardiff
The same search run across the whole booking window, so the shape of the curve is visible rather than described.
- €42.0390 days
- €33.1860 days
- €31.4145 days
- €33.1830 days
- €33.1821 days
- €49.1114 days
- €48.527 days
- €47.933 days
- €67.991 days
- Cheapest lead time
- Fares bottom out around 45 days ahead, at €31.41.
- How much it moves
- The gap between the cheapest and most expensive lead time is 116 percent. The most expensive point is €67.99, 1 days out.
- What that means
- Today sits inside the cheap window, which closes about 45 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.
- €42.03Sun
- €36.72Mon
- €38.49Tue
- €40.26Wed
- €53.83Thu
- €43.80Fri
- €48.52Sat
Where you leave from and where you arrive
The stations, airports and ports each mode on this corridor actually uses.
Saint Helier
Air
- JER
Cardiff
Air
- CWL
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
- 20% of the services we sell on this corridor run through without a change. The remaining 80% involve one connection.
- How far it really runs
- The route covers 274 km against 266 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 London, Exeter, Bristol, Southampton. The gap between arriving and leaving is 70 minutes, of which about 14 is walking.
- If the connection is missed
- The tightest connection we sell here has a 14 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 Saint Helier at 06:22 and the last at 07:30, across 5 departures. The return direction keeps its own timetable, so the times back are not these times reversed.
Questions about Saint Helier to Cardiff
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 Saint Helier to Cardiff take?
The Flight from Saint Helier to Cardiff takes 3h 59m door to door, of which 49m is spent moving. The route runs 274 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 Saint Helier to Cardiff cost?
The Flight from Saint Helier to Cardiff starts at €36.72 for one passenger, checked on September 12, 2026. A typical fare is €45.57. 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 Saint Helier to Cardiff?
1 operators run the Flight from Saint Helier to Cardiff: CityJet. Between them they file around 5 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 Saint Helier to Cardiff use?
The Flight from Saint Helier to Cardiff leaves from Saint Helier JER and arrives at Cardiff CWL. 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 Saint Helier to Cardiff?
Fares for the Flight from Saint Helier to Cardiff bottom out around 45 days ahead, at €31.41. The gap between the cheapest and most expensive lead time across the window is 116 percent, measured on September 12, 2026. Booking inside the final week has consistently cost more.
How much CO2 does the Flight from Saint Helier to Cardiff produce?
The Flight from Saint Helier to Cardiff produces about 67.4 kg of CO2 per passenger over 274 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 Saint Helier to Cardiff on September 12, 2026: 274 km of route against 266 km in a straight line, 5 services a day, 1 operators, a cheapest fare of €36.72, and 3h 59m door to door on the fastest mode. The return direction is computed separately and its numbers are not these numbers.
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CWL is not in Cardiff, 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 CWL into Cardiff?
Settled in advance, so the ride into Cardiff costs what it said it would rather than what the cab stand says.
Book a ride from CWL 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.