It's the train of today at 12:55 from Paris more to liege

Thalys is usually sold out weeks in advance for pass holders.

Checking for you, stay tuned for updates and alternatives.

Pass holder seats are sold out.

Alternatives: head with an ordinary TGV to Lille

Still plenty of availability: book Paris-Nord Lille here: https://travel.b-europe.com/Eurail-GE/en/booking-tgv#TravelWish or at the station

The 13:16 for you, seems perfect. Arrival 14:18 in Lille Flandres station. Maybe even 12h25 if you can make that.

From Lille Flandres you have two options, about every hour:

• Taking the train to Tournai/Doornik at hh:08. Change in Tournai to Brussels, in Brussels to Liège. See Option 3 below. Quickest, but more changes.
• Or you take the train to Courtrai/Kortrijk at hh:09, change in Kortrijk and at every weekday hh:18 you have a direct train to Liège (train to Welkenraedt). Slightly slower due to the longer change time in Kortrijk, but less changes. See option 1 & 2 below.

No further reservations needed with those option, just the TGV Paris-Lille needs to be reserved. And that one is way cheaper than Thalys ;)

Thanks for the quick answer.