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Travellers heading through Dublin and Shannon airports on 12 and 13 September 2026 are being urged to plan for significant disruption, as Phoenix Park remains closed and security measures linked to a high-profile visit slow public transport around key routes in Dublin and West Clare.
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Phoenix Park fully closed through Saturday afternoon
Phoenix Park in Dublin is shut to all traffic and pedestrians from late on Thursday night, 10 September, through 18:00 on Saturday, 12 September 2026. Publicly available information from the Office of Public Works and Transport for Ireland describes the closure as an operational requirement, coinciding with preparations for a state visit to Áras an Uachtaráin inside the park.([transportforireland.ie](https://www.transportforireland.ie/events/phoenix-park-dublin-closure-11pm-10th-to-6pm-12th-sep/?utm_source=openai))
All gates and internal roads are closed for the duration, including access routes commonly used as a cross-city shortcut for drivers between Dublin’s northside and west. The closure also affects recreational access, with Dublin Zoo among the attractions confirming it will not open to visitors on Friday 11 and Saturday 12 September, and scheduled guided tours in the park on 12 September marked as unavailable.([transportforireland.ie](https://www.transportforireland.ie/events/phoenix-park-dublin-closure-11pm-10th-to-6pm-12th-sep/?utm_source=openai))
Officials indicated that if security operations are completed ahead of schedule, gates could reopen earlier than the advertised time, but travellers and commuters are being advised not to rely on any early lifting of restrictions when planning journeys over the weekend.([transportforireland.ie](https://www.transportforireland.ie/events/phoenix-park-dublin-closure-11pm-10th-to-6pm-12th-sep/?utm_source=openai))
The closure follows a pattern set out in the Phoenix Park event and operations guide, which anticipates full park lockdowns for major state occasions, with surrounding roads expected to absorb displaced traffic.([phoenixpark.ie](https://www.phoenixpark.ie/wp-content/uploads/2023/08/Phoenix-Park-Event-Guide-2021-2025.pdf?utm_source=openai))
Bus services and city routes rerouted around the park
Transport for Ireland has confirmed that Route 99, which normally serves Phoenix Park, is suspended while the park remains closed, with diversions in place for other services that usually run along or through the park’s perimeter.([transportforireland.ie](https://www.transportforireland.ie/events/phoenix-park-dublin-closure-11pm-10th-to-6pm-12th-sep/?utm_source=openai))
Dublin Bus service updates published this week outline a series of diversions across multiple city routes on 11 and 12 September, including services on key radial corridors such as routes 19, 24, 27b, 37, 38, 39, 39a, 44 and 70. While each change varies by route and time, the common theme is to steer buses away from the park boundary, the North Circular Road and other approaches feeding into the Phoenix Park area.([dublinbus.ie](https://www.dublinbus.ie/News?utm_source=openai))
In addition to the Phoenix Park-specific diversions, separate rail works over the same weekend will interrupt DART services between Dún Laoghaire and Greystones on 12 and 13 September. Irish Rail has advised that passengers can use TFI Leap cards on alternative public transport during these works, adding another layer of timetable complexity for those trying to connect into or out of the capital.([dublinpublictransport.ie](https://www.dublinpublictransport.ie/blog/no-dart-services-between-dn-laoghaire-and-greystones-on-12-and-13-september?utm_source=openai))
These overlapping changes mean that passengers connecting between inner-city bus routes, DART services and onward airport coaches should allow extra time and check service alerts shortly before departure, particularly on Saturday morning when both diversions and rail works are in effect.
Security visit triggers disruption at Dublin Airport and along the M50
Publicly available information shows that the disruption is closely tied to the arrival of the President of the United States into Dublin on Saturday 12 September for a two-day visit, with engagements in Phoenix Park and onward travel westwards. Coverage of the transport plan highlights rolling road closures and speed restrictions on sections of the M50 and key radial routes as the official motorcade moves between Dublin Airport, the city and onward connections.([westmeathindependent.ie](https://www.westmeathindependent.ie/2026/09/11/boxer-moran-heavily-involved-in-planning-of-trumps-irish-visit/?utm_source=openai))
Transport advisories indicate that the highest impact around Dublin is expected on Saturday morning and around midday, when traffic on the M50 between junctions 3 and 6 will be subject to intermittent closures. Reports also describe tighter perimeter security at Dublin Airport during arrival and departure windows, with drivers warned of temporary lane reductions and checkpoint delays on access roads.([reddit.com](https://www.reddit.com/r/irelandtransport/comments/1wdcjbn/road_closures_and_traffic_restrictions_in_place/?utm_source=openai))
These measures will coincide with already busy weekend traffic and the ongoing diversions linked to the Phoenix Park closure. Commuters using bus routes to and from Dublin Airport, as well as private motorists heading for early flights, are being encouraged by transport operators to travel well ahead of normal schedules to avoid missing departures.([d14am7hswtp58z.cloudfront.net](https://d14am7hswtp58z.cloudfront.net/service-updates?utm_source=openai))
Weather advisories for Dublin show no severe conditions expected that would compound the disruption, but overnight warnings into early Saturday could contribute to slower driving speeds during the first hours of the security operation.([met.ie](https://www.met.ie/warnings/tomorrow/dublin?utm_source=openai))
Shannon Airport and West Clare face Irish Open and security delays
The transport impact extends beyond Dublin. As the US President’s visit overlaps with the Amgen Irish Open golf tournament in County Clare, published guidance warns of delays around Shannon Airport, Doonbeg and the wider West Clare area throughout the weekend.([transportforireland.ie](https://www.transportforireland.ie/events/phoenix-park-dublin-closure-11pm-10th-to-6pm-12th-sep/?utm_source=openai))
On Saturday 12 September, travellers are advised to expect delays on routes serving Shannon Airport, particularly in the afternoon and evening, as security movements and event traffic converge. On Sunday 13 September, delays are forecast to persist throughout the day on routes serving Doonbeg and West Clare, with further afternoon and evening impacts again anticipated around Shannon Airport.([transportforireland.ie](https://www.transportforireland.ie/events/phoenix-park-dublin-closure-11pm-10th-to-6pm-12th-sep/?utm_source=openai))
Transport for Ireland has highlighted that spectators attending the Irish Open should rely on designated park-and-ride hubs, with shuttle buses forming the primary access to the venue. Travellers heading to or from Shannon Airport at peak tournament times may therefore find regular public services sharing road space with event shuttles and private traffic, adding to congestion.([transportforireland.ie](https://www.transportforireland.ie/events/phoenix-park-dublin-closure-11pm-10th-to-6pm-12th-sep/?utm_source=openai))
Visitors who plan to land at Shannon and continue by road along the Clare coast are being advised to factor in longer transfer times, particularly late on Sunday when the tournament concludes and outbound flows peak.
Practical advice for travellers over the 11–13 September window
Across both Dublin and Shannon, the broad message from transport operators and event organisers is to build additional time into any journey on 11, 12 and 13 September, even if travelling outside the core security windows. Those heading to the airports should allow for potential delays at multiple points, including city-centre connections, outer orbital roads and final approach routes to terminals.([transportforireland.ie](https://www.transportforireland.ie/events/phoenix-park-dublin-closure-11pm-10th-to-6pm-12th-sep/?utm_source=openai))
Airport passengers are encouraged to check airline guidance on recommended arrival times and to monitor real-time information from bus and coach companies, including last-minute diversion notices around the Phoenix Park perimeter and the M50 corridor. For rail users, Irish Rail’s weekend works south of Dún Laoghaire may require substituting DART legs with bus or Luas connections, especially for those starting journeys in coastal suburbs.([dublinpublictransport.ie](https://www.dublinpublictransport.ie/blog/no-dart-services-between-dn-laoghaire-and-greystones-on-12-and-13-september?utm_source=openai))
Tourists planning to visit Phoenix Park or Dublin Zoo during this period will need to rearrange itineraries, as access to the park is effectively suspended until Saturday evening and some park-based tours are cancelled on 12 September. Alternative green spaces such as the city’s canals, coastal promenades or other urban parks may offer less affected options for outdoor time within Dublin.([transportforireland.ie](https://www.transportforireland.ie/events/phoenix-park-dublin-closure-11pm-10th-to-6pm-12th-sep/?utm_source=openai))
With major state security operations, a flagship sporting event, and scheduled rail engineering all coinciding across three days, Ireland’s main transport corridors are set for an unusually congested weekend. Travellers who check updates regularly and allow generous buffers in their plans are most likely to avoid missed flights and connections.
Transport for Ireland: Phoenix Park closure and public transport advice
LMFM: Travel impacts for Dublin, Shannon and the Irish Open
Dublin Bus: latest news and service diversions
Dublin Public Transport: DART service changes 12–13 September