The average bus between Portmarnock and Letterkenny takes 4h 52m and the fastest bus takes 3h 48m. There is a bus service every few hours from Portmarnock to Letterkenny. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Buses run hourly between Portmarnock and Letterkenny. The earliest departure is at 6:11 AM in the morning, and the last departure from Portmarnock is at 11:55 PM which arrives into Letterkenny at 4:11 AM. All services require a transfer at Airport Zone 15 and take an average of 4h 52m. The schedules shown below are for the next available departures.

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5h 11m • 1 changeWant to know about travelling from Portmarnock to Letterkenny? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct bus from Portmarnock to Letterkenny. However, there are services departing from Airport Zone 12 station and arriving at Letterkenny Bus station via Letterkenny Bus station. The journey, including transfers, takes approximately 4h 52m.
Portmarnock to Letterkenny bus services, operated by Expressway (Bus Éireann), depart from Airport Zone 12 station.
Portmarnock to Letterkenny bus services, operated by Expressway (Bus Éireann), arrive at Letterkenny Bus station.
The distance between Portmarnock and Letterkenny is 199.2 km. The road distance is 226 km.
Expressway (Bus Éireann) operates a bus from Airport Zone 12 to Letterkenny Bus every 2 hours. Tickets cost €26–40 and the journey takes 3h 54m. Mc Ginley Coach Travel also services this route every 4 hours.