Belfast to Dublin flight
Flights from Belfast to Dublin start at €31.41 and take 3h 46m at their fastest.
The Flights from Belfast to Dublin starts at €31.41 and takes 3h 46m door to door, run by 2 operators over 146 km, with around 2 departures a day. Fares bottom out about 60 days before departure.
- 3h 46mDoor to door
- 36mMoving
- €31.41From
- 35.9 kgCO2
The cheapest and the fastest on September 28, 2026
Two journeys we can sell today, with the service number each operator files them under.
No bookable itinerary on the day this page prices, so none is shown.
Airlines
Speed, flexibility and what is on board. Nothing here is a rating, because we have not earned one.
The flight gets you into Dublin. It does not get you a bed, and neither do we.
Rooms within reach of Dublin Heuston
Filter by neighborhood and by nightly price, and the map tells you what is a walk and what is a cab.
Search Dublin 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 Belfast to Dublin
The same search run across the whole booking window, so the shape of the curve is visible rather than described.
- €20.6990 days
- €12.9960 days
- €16.2945 days
- €17.9430 days
- €22.8921 days
- €25.6414 days
- €25.097 days
- €27.843 days
- €35.541 days
- Cheapest lead time
- Fares bottom out around 60 days ahead, at €12.99.
- How much it moves
- The gap between the cheapest and most expensive lead time is 174 percent. The most expensive point is €35.54, 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.
- €27.84Sun
- €23.99Mon
- €21.79Tue
- €22.34Wed
- €25.09Thu
- €28.39Fri
- €24.54Sat
Where you leave from and where you arrive
The stations, airports and ports each mode on this corridor actually uses.
Belfast
- BFS
- BHD
Dublin
- DUB
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
- 50% of the services we sell on this corridor run through without a change. The remaining 50% involve one connection.
- How far it really runs
- The route covers 146 km against 142 km in a straight line, a detour of 1 percent. Track and road geometry account for the difference.
- Where the change is
- Connections are made at Drogheda, Douglas, Dundalk, Derry. The gap between arriving and leaving is 49 minutes, of which about 5 is walking.
- If the connection is missed
- The tightest connection we sell here has a 19 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 Belfast at 06:04 and the last at 06:53, across 2 departures. The return direction keeps its own timetable, so the times back are not these times reversed.
Flights against the other ways to make this journey
The same corridor, door to door, with every mode that runs it.
| Mode | Door to door | Moving | At the ends | From | CO2 | Per day |
|---|---|---|---|---|---|---|
| Train | 1h 51m | 1h 7m | 44m | €21.79 | 4.7 kg | 5 |
| Flight | 3h 46m | 36m | 3h 10m | €31.41 | 35.9 kg | 2 |
Questions about Belfast to Dublin
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 Belfast to Dublin take?
The Flight from Belfast to Dublin takes 3h 46m door to door, of which 36m is spent moving. The route runs 146 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 Belfast to Dublin cost?
The Flight from Belfast to Dublin starts at €31.41 for one passenger, checked on September 28, 2026. A typical fare is €31.41. 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 Belfast to Dublin?
2 operators run the Flight from Belfast to Dublin: Aer Lingus, Emerald Airlines. Between them they file around 2 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 Belfast to Dublin use?
The Flight from Belfast to Dublin leaves from Belfast BHD and arrives at Dublin DUB. 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.
Is the Flight the best way from Belfast to Dublin?
Traveling from Belfast to Dublin by Train costs €21.79 and takes 1h 51m door to door, against 3h 46m by Flight. Which is better depends on whether the money or the hours matter more on this trip. The comparison table on this page shows every mode side by side.
When should I book the Flight from Belfast to Dublin?
Fares for the Flight from Belfast to Dublin bottom out around 60 days ahead, at €12.99. The gap between the cheapest and most expensive lead time across the window is 174 percent, measured on September 28, 2026. Booking inside the final week has consistently cost more.
How much CO2 does the Flight from Belfast to Dublin produce?
The Flight from Belfast to Dublin produces about 35.9 kg of CO2 per passenger over 146 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 Belfast to Dublin on September 10, 2026: 146 km of route against 142 km in a straight line, 2 services a day, 2 operators, a cheapest fare of €31.41, and 3h 46m door to door on the fastest mode. The return direction is computed separately and its numbers are not these numbers.
Related journeys
Landing at DUB after the trains have stopped is the case this solves. We do not run cars.
A car waiting when you land in Dublin
Settled in advance, so the ride into Dublin costs what it said it would rather than what the cab stand says.
Book a ride from DUB 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.