PRG - CDG
 

Bottom line...What is the best way to get from Prague to Paris? Trains appear to be in excess of 13 hours and flights are limited to a few airlines. Any suggestions as to what carrier to take?

Easyjet and smartwings both do it direct for less than £100 (as shown on kayak.co.uk). Both PRG - CDG.

That's cheapest-- don't know about 'best'.

Also, let's see if the readers of our Travel->Europe forum can help. Ocn Vw 1K, Moderator, TravelBuzz.

you can use Wizz Air to Paris-Beauvais its airport located outside city.

CSA or Air France to CDG or mentioned EasyJet or SmartWings (both low-cost) also to CDG ..

train wouldn't be cheaper and trip is longer

For the easter weekend, I managed to get tickets on AF for abt 140Eur pp just 1 week before the flight ^.. would suggest you try this option even if its 30-40 Eur costlier than the low cost ones..
If difference is more, ofcourse I would also go for the cheaper airlines, but take into account that mostly their timings are not so good and most normally fly to BVA which is quite quite far from Paris..