The average train between Mons and Saint-Omer takes 2h 55m and the fastest train takes 2h 13m. The train service runs several times per day from Mons to Saint-Omer. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Trains run every 4 hours between Mons and Saint-Omer. The earliest departure is at 6:46 AM in the morning, and the last departure from Mons is at 8:46 PM which arrives into Saint-Omer at 7:00 AM. All services require a transfer, and take on average 2h 55m. The schedules shown below are for the next available departures.

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2h 14m • 1 changeWant to know about travelling from Mons to Saint-Omer? 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 train from Mons to Saint-Omer. However, there are services departing from Mons station and arriving at Saint-Omer station via Lille Flandres. The journey, including transfers, takes approximately 2h 55m.
Mons to Saint-Omer train services, operated by Belgian Railways (NMBS/SNCB), depart from Mons station.
Mons to Saint-Omer train services, operated by Belgian Railways (NMBS/SNCB), arrive at St Omer station.
Book your Mons to Saint-Omer train tickets online with Belgian Railways (NMBS/SNCB) and Société Nationale des Chemins de fer Français (SNCF).
The distance between Mons and Saint-Omer is 123.8 km. The road distance is 134 km.
You can take a train from Mons to St Omer via Lille Flandres in around 2h 20m.