Thanks for the tips! We'll be travelling in November and it won't let me book that far in advance. Looks like the cheapest fare is sadly their 1-way "Librys" ticket for 101 euro (aie), unless I can snag one of the "Smilys" fares for 69 euro roundtrip and toss the return ticket.

If I can't get that special "Smilys" fare, is there any reason to book the trip before getting to Paris? Is there any way to get some discount? Or should I just wait it out?

Thank you!