SNCF, SBB and SNCB to Launch Brussels–Basel TGV INOUI Service in July 2027

France's SNCF Voyageurs, Switzerland's SBB and Belgium's SNCB will launch a pilot TGV INOUI service linking Brussels and Basel from July 2027. The new route extends the existing Brussels–Strasbourg service and will operate on weekends only during the trial phase.

The service marks the first direct high-speed rail connection between the Belgian and Swiss capitals. It eliminates the current requirement for passengers to change trains in Strasbourg or other intermediate stations. Weekend-only scheduling suggests operators are testing demand patterns before committing to full timetable integration.

The Brussels–Basel route will use the TGV INOUI brand, SNCF's premium domestic and international high-speed product. Operators have not disclosed journey times, frequency, rolling stock allocation or ticket pricing for the pilot phase. The existing Brussels–Strasbourg segment operates via Luxembourg and eastern France.

The extension forms part of broader efforts to expand cross-border high-speed rail in Western Europe. SBB already operates TGV Lyria services to Paris in partnership with SNCF. The Basel station serves as a major junction connecting Swiss, French and German networks. Operators will evaluate the pilot's commercial performance before deciding whether to transition the service to year-round daily operation beyond 2027.

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