On Fri, 01 Jul 2016 07:25:32 +0200, W. Wesley Groleau wrote:

Buses. For historical reasons there are few long distance buses in
France.
http://www.eurolines.es/en/

Eurolines:
Burgos-London Jul. 2. 118EUR+taxes(5EUR)
Burgos-Paris (Gallieni) Jul. 1. 18H00 86EUR

http://www.ouibus.com/
Paris(Bercy) to London Jul. 2. 14H00 - 22H00 29EUR.
21H00-5H00 35EUR

Paris Gallieni to Paris Bercy one metro ticket.