Turtle One by Nuna

Keep in mind that on some flights they will not let you install a car seat even if it’s FAA approved and the airlines allow it. Bring a cover in case you have to check it at the gate. Check your car seat to see if it’s easier to install on the right or left side of the plane (usually right is easier). I’ve traveled with my baby in the Turtle One car seat and had no issues—way better than the flight where he was on my lap. The Graco Extend to Fit is a nightmare to haul around and install. This is all really dependent on your car seat and if you can afford an extra seat and easily install your car seat without holding up the people behind you and sweating a ton (they don’t always let little babies go on first). I usually fly delta and Alaska

Nuna makes an infant car seat that has isofix built right into the seat (no separate base needed). It’s designed for people in your situation. We don’t have a car either and a lightweight Nuna model is what we use, but I wish we had the newer one with Isofix anytime I try to remember how to put it in a car with the seatbelt With our first (height of COVID ) we had a rental car and when we asked the hospital to check whether we’d strapped our baby in correctly before we left they looked at us kinda funny but found somebody to take a quick glance. With our second we took the U Bahn home.

I don't have the Doona, but I have a full-size stroller (Bugaboo Fox) + another small travel stroller for the car (Bugaboo Butterfly), and I think this setup was the best option for my lifestyle (heavy daily use of stroller in an area with terrible sidewalks and snow, small car). We did have an infant car seat that connected to both strollers (Turtle One, I think - we chose it simply due to compatibility with both). I think you'd get more value/use out of two strollers + car seat that connects to both, as the Doona is really limited in usability past a certain age. With a travel stroller, you can get most of the benefits of a Doona, and later switch to using the stroller without a car seat.

We have the Nuna Turtle - little on the heavy side but a great carseat. Compatible with the bugaboo kangaroo

Then you’re going to want a newborn car seat if you want it to work with a stroller. Figure out what stroller you like and then get the car seat that works with, not the other way around. You’ll only be using this newborn seat for less than a year but using the stroller for much longer. We went with Nuna car seat and it’s been fine but that’s only because that’s what worked best with our bugaboo stroller.

We have a bugaboo fox 5 and are very happy with it. Large stroller for fitting in a trunk but I knew that. Just curious but if you’re a ftm, why go with a donkey? Are you planning on having a second baby within two years or so after this one? The reason I ask if the donkey is quite large. Why not get the kangaroo in that case? The donkey has a hard time fitting through doorways. I know that’s not what you’re asking for advice on so I’ll get to what you asked about. We are using a bugaboo turtle air shield which is just a Nuna pipa air RX but rebranded as all black for bugaboo. You’ll still need adapters for it like you will with all of these car seats. Some of the seats you have listed here are no longer on the market so that takes them out of contention. The Nuna pipa aire rx is extremely light which is nice. You’re going to want a newborn car seat for the first year in my opinion. It’s very nice to be able to pull the car seat out of the car and clip it in without having to disturb the baby to transfer them to the stroller seat, which you can’t use until 6 month due to not enough recline, so you’d have to use the huge bassinet to go into stores. The bassinet is fantastic for walks though but not for running into stores.