If you’re heading from Sligo to Dublin Airport and want to skip the fuel stops and parking headaches, Bus Éireann Expressway’s Route 23 runs the M4 motorway straight to Terminal 2 — no connections needed. The journey takes around three and a half hours, with six services each direction on weekdays, and fares typically start around €26 when booked ahead.

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Operator: Bus Éireann Expressway Route 23 · Daily Services: 6 per direction · Journey Time: 3h 21m – 3h 28m · Starting Fare: €25 – €30

Quick snapshot

1Route Overview
  • Direct to Dublin Airport (Bus Éireann)
  • 37 stops from Sligo to Dublin Busáras (Moovit)
  • Via M4 motorway through Longford and Carrick-on-Shannon (Bus Éireann)
2What’s unclear
  • Whether Free Travel Pass is accepted on Expressway services
  • Current peak vs off-peak pricing on the official fare finder
  • Luggage dimension limits not published on operator site
3Timetable signal
  • Latest timetable effective 24 August 2025 (Scribd)
  • One fewer service on Sundays and Public Holidays (Scribd)
  • Stephen’s Day services added since November 2022 (Scribd)
4What happens next
  • Book via Expressway.ie or onboard with contactless
  • Real-time tracking available before departure
  • Arrive at Sligo Bus Station at least 15 minutes early

The key specifications below consolidate verified data from Bus Éireann’s official route page, BusTimes.org, and CheckMyBus samples.

Detail Value
Operator Bus Éireann Expressway
Route Number 23
Fastest Journey 3h 21m
Daily Connections 8 total (6 on Sundays)
Airport Stop Yes — Zone 13/19/21, Terminal 2
Earliest Sligo Departure 01:00
Latest Sligo Departure 15:30
Cheapest Single Fare €26
Booking Online or onboard
Real-Time Tracking Via Expressway.ie

Is there a bus service from Sligo to Dublin Airport?

Yes, Route 23 connects Sligo directly to Dublin Airport with no transfers required. The service runs under Bus Éireann’s Expressway brand and departs from Sligo Bus Station, arriving at Dublin Airport’s Terminal 2 Zone 19 after roughly three and a half hours on the M4 motorway.

The route passes through key towns including Ballysadare, Collooney, and Carrick-on-Shannon before joining the M4 for the final run into the airport. Bus Éireann describes it as one of the fastest and most convenient ways to travel between Dublin and Sligo.

The upshot

Route 23 is the only direct bus option from Sligo to Dublin Airport. If you need to fly out of Terminal 1 or cargo areas, you’ll still alight at Terminal 2 and connect via shuttle.

Expressway Route 23 details

Route 23 is operated by Bus Éireann under the Expressway label, which handles longer intercity routes across Ireland. The service runs daily, including Public Holidays, with a reduced timetable on Sundays. A November 2022 timetable update introduced Stephen’s Day services, and a new timetable becomes effective 24 August 2025.

“Not only is the Expressway Route 23 service one of the fastest ways of travelling between Dublin and Sligo, it’s also one of the most convenient.”

— Bus Éireann, official route page

What bus goes straight to Dublin Airport?

Expressway Route 23 is the bus that goes straight to Dublin Airport from Sligo. Unlike local services that terminate in Dublin city, Route 23 diverts off the M4 to stop at the airport before continuing to Dublin Busáras (the central bus station).

The airport stop sits within Dublin Airport Zone 13/19/21, which serves both arrivals and departures for Terminal 2. The Expressway.ie route page confirms the service runs both directions via the airport hub.

Route 23 path

Heading north to south, Route 23 exits the M4 at Liffey Valley and enters airport zones before terminating at Dublin Busáras. From Sligo, the airport stop comes roughly three hours in, making it a practical drop-off point for departing passengers.

“The best way to find cheap bus tickets from Sligo to Dublin Airport is to book your tickets as early as possible. Prices tend to rise as your travel date approaches.”

— Busbud, booking aggregator

Bus Éireann’s route data shows 37 stops from Sligo Bus Station to Dublin Busáras, with Route 23 passing through Dublin Airport Zone 13/19/21, Liffey Valley, and Lucan along the way.

Direction Stops Total Duration
Sligo → Dublin Airport 37 stops 3h 21m – 3h 40m
Dublin Airport → Sligo 37 stops ~3h 30m
Sligo → Dublin Busáras 37 stops ~3h 44m

What is the Sligo to Dublin Airport bus timetable?

Six buses run from Sligo to Dublin Airport on weekdays, with five on Sundays and Public Holidays. The earliest departure is at 01:00 (arriving 4:24 AM), followed by 06:00 (arriving 9:28 AM), 08:00 (arriving 11:36 AM), 12:20 PM (arriving 4:00 PM), 15:30 (arriving 19:10 PM), and 18:15.

In the opposite direction, five buses depart Dublin Busáras for Sligo via the airport: 11:00, 13:45, 17:30, 20:00, and 23:00, reaching the airport 25 minutes after each departure. CheckMyBus and BusTimes.org both confirm these schedules across multiple samples.

Bus 23 schedule

The weekday departures from Sligo to Dublin Airport are clustered in the morning and afternoon, with no mid-afternoon service between 12:20 PM and 15:30. Morning travellers have three options before noon, while afternoon travellers have two. The 01:00 departure serves late-night airport arrivals or early-morning flights from Sligo.

  • 01:00 Sligo → 4:24 AM Dublin Airport
  • 06:00 Sligo → 9:28 AM Dublin Airport
  • 08:00 Sligo → 11:36 AM Dublin Airport
  • 12:20 PM Sligo → 4:00 PM Dublin Airport
  • 15:30 Sligo → 7:10 PM Dublin Airport
  • 18:15 Sligo → 21:45 Dublin Airport

Frequency and stops

With eight total connections per day (six weekday, five weekend), Route 23 offers reasonable frequency for a regional intercity route. Key intermediate stops include Longford and Carrick-on-Shannon, both served without diversion from the main M4 corridor. Omio notes up to 49 total buses daily between Sligo and Dublin across all operators, though only 23 of those are direct Route 23 services.

Why this matters

Travellers planning day trips face scheduling constraints if they need to connect to specific flights. The gap between 12:20 PM and 15:30 leaves no viable afternoon departure for connections requiring an early evening flight from Dublin.

How much is the Sligo to Dublin Airport bus fare?

Fares start at approximately €26 for a single adult ticket from Sligo to Dublin Airport, according to sample pricing from Expressway tickets and fare aggregators. CheckMyBus lists the range as $28–$33 USD (roughly €26–€30), while Rome2Rio confirms Expressway fares from €30.

Busbud recommends booking early for the lowest prices, as fares rise as the travel date approaches. Bus Éireann’s Fare Finder tool provides exact pricing for your specific date and booking tier.

Ticket prices

Three fare tiers typically apply: Basic (cheapest, limited flexibility), Standard, and Flexi (most expensive, fully refundable). For Sligo to Dublin Airport specifically, sample pricing shows:

Fare comparisons from multiple aggregators reveal a consistent floor around €26 for advance bookings, with upward pressure as departure dates approach.

Source Lowest Fare Notes
Expressway Ticket Sample €26 Single, basic tier
CheckMyBus €26–€30 USD range converted
Rome2Rio €30 Operator confirmed
Busbud $32–$33 USD, recommends advance

Prices fluctuate based on demand, time of booking, and day of travel. Weekend departures and holiday periods tend toward higher fares, while midweek off-peak slots may fall to the €26 floor.

What to watch

The official Bus Éireann Fare Finder updates dynamically and doesn’t publish static prices in this article. Always check the tool directly before booking — especially during school holidays and public holidays when demand spikes.

Can I buy a ticket on the Sligo to Dublin Airport bus?

Yes, you can purchase tickets both online before travel and directly from the driver on board. Expressway.ie handles advance bookings with real-time service availability, while cash and contactless card payments are accepted onboard at standard fares.

For advance bookings, the Expressway portal shows available services and seat availability. The Bus Éireann Fare Finder calculates exact prices for your journey before you commit. Real-time tracking on Expressway.ie lets you monitor your bus’s progress before arrival at Sligo Bus Station.

Payment options

  • Online via Expressway.ie (advance purchase, seat guaranteed)
  • Contactless card with the driver (standard fare applies)
  • Cash with the driver (where accepted)
  • Third-party aggregators: Busbud, Omio, Rome2Rio (prices may vary)

Contactless and passes

Contactless payments are standard on Expressway services, making it easy to board without exact change. Regarding free travel passes (e.g., for seniors or disability cardholders), the research notes show conflicting information — Transport for Ireland provides general bus fares guidance, but specific Expressway acceptance policies for free travel passes are unclear in current documentation.

If you hold a Free Travel Pass, verify acceptance directly with Bus Éireann customer service before travelling, as Expressway operates some routes under different commercial arrangements than standard city services.

Bottom line: Route 23 is the only direct bus from Sligo to Dublin Airport — a 3h 21m ride with six weekday services and fares starting around €26. Early booking locks in lower prices; contactless onboard payment handles last-minute travel. If a Free Travel Pass is in your pocket, call ahead to confirm it works on Expressway.
Additional sources

buseireann.ie, transportforireland.ie

Travelers heading from Sligo to Dublin might compare the bus with the Sligo-Dublin train timetable, offering 7-8 daily services to Connolly Station.

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Frequently asked questions

How long does the Sligo to Dublin Airport bus take?

The fastest journey is 3 hours and 21 minutes, with most departures arriving within 3h 28m to 3h 40m depending on traffic and departure time. The CheckMyBus samples show this range consistently across multiple dates.

Where does the bus depart from in Sligo?

Route 23 departs from Sligo Bus Station, the main coach and bus hub in the town centre. Buses load from the Expressway bay — arrive at least 15 minutes before your departure time, especially on weekends when the station gets busy.

Does the bus stop at Dublin Airport terminal?

Yes, Route 23 stops at Dublin Airport Zone 13/19/21, which serves Terminal 2 arrivals and departures. The stop is on the terminal forecourt — look for Zone 19 markings and follow signs to the Expressway coach bay.

How do I book Route 23 tickets?

Book online at Expressway.ie, use the Bus Éireann Fare Finder for exact pricing, or purchase directly from the driver with contactless or cash. Third-party sites like Busbud and Omio also sell Route 23 tickets.

Are there luggage restrictions?

Standard Bus Éireann luggage policies apply — one large bag and one small item per passenger are included. Exact dimension and weight limits aren’t published on the Expressway site, so travellers with oversized sports equipment or musical instruments should contact Bus Éireann ahead of time.

Is there WiFi on the Expressway buses?

WiFi availability varies by vehicle and route. Expressway buses on longer routes like Route 23 typically offer free WiFi, but connectivity depends on the M4 corridor coverage. For important video calls or work, bring offline content as a backup.

What if I miss my bus?

If you miss your scheduled departure, the next service is typically three to four hours later on weekdays. No standby or waitlist system exists — the best recourse is to rebook through Expressway.ie or check third-party availability. Travel insurance covering missed connections may help with costs if missing the bus causes downstream problems.

Can I track my bus in real time?

Yes, Expressway.ie offers real-time tracking for active services. Enter your route and departure time to see live bus location and estimated arrival at your stop.

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