Hi Ben,
I use a simple bag I got from Blacks, it has a stiff bottom

and wheels with just a grab handle at the other end.
It takes my Marryat 10ft and I put my 8'6" in the same rod case nose to to tail.
The problem with the purpose built fishing travel bags is that because of the many, totally unnecessary, pockets etc. many of them are expensive and weigh as much as 6.5 kg. If you are on Ryanair that is already 40% of your checked baggage allowance.
My bag weighs less than 3kg, cost £40 and has, so far, done 2 trips to Canada and 2 to the Czech Republic without problems.
Another cheap, lightweight alternative is a cricket bag, they are long and light and also about £40.
Cheers
Bill