Harmony said:The Evenflo Triumph is approved for airlines. I'm sure the Roundabout is too as I remember researching that car seat at one time. (still, double check on that)
Yes, the Roundabout is approved. Very few seats *aren't* approved. You can't use a booster seat (one that lifts the child up to use the car's seatbelt rather than using an internal harness) because they require a shoulder belt. Nor can you use a shield booster like the Grand Explorer (and you shouldn't use it in your car either, as it's a deathtrap). Other than that, only specialty seats like the Britax Husky are likely to not be approved. Just look for the sticker on your seat.