On another thread someone mentioned that the Britax seats were too big to fit in the airline seat. I have used my DD's Roundabout in an Airtran seat with no problems. However, I have a Marathon for DS and it is bigger. I could use the Roundabout for DS still (DD doesn't need on and is now in a booster), but would prefer to use his Marathon. Both are approved for air travel.
Has anyone fit a Marathon into an Airtran seat?
Has anyone fit a Marathon into an Airtran seat?