A passenger flying from Nigeria to Paris on Thursday, 5 November, may find the next part of the journey takes more planning than usual. A strike in France is expected to reduce service on the RER B train that links Charles de Gaulle airport with central Paris. The notice concerns the railway portion of the trip. It does not announce a change to airline schedules.
The line operator published its forecast on 3 November, and Bonjour RATP updated its passenger information on 4 November. On the northern section between Gare du Nord and the branches to Aéroport Charles de Gaulle 2 and Mitry-Claye, operators expect to run one train in two. That is a proportion of the normal service, not a promise of a train at a particular interval.
South of Gare du Nord, the forecast is different. About two trains in three are expected towards Saint-Rémy-lès-Chevreuse and Robinson. Through running is planned, so passengers following the line across Paris are not being asked to change trains at Gare du Nord because of the strike.
A separate notice matters for people arriving late. From 10.45pm local time, engineering work affects the section between Châtelet–Les Halles and the northern destinations, including the airport. The operator says the evening replacement bus service is being maintained. The daytime service forecast and the evening works therefore answer different questions about the same journey.
For somebody returning to the airport, the distinction between the two northern branches is important. A departure marked Mitry-Claye is not an airport train. Look for the airport destination on the departure display and check the schedule for the time and station where you will actually travel.
What it means for you. Check your train journey in the operator's timetable or mobility app before leaving for a flight, and allow time to wait for the right branch. For a late arrival, check the replacement bus arrangements as well as the last train. A flight confirmation by itself cannot tell you whether your usual rail connection will run.