Nuna - 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.

I started with the Nuna Mix as a travel system but it was so massive. If I had another baby I’d get the Doona car seat and stroller and as they age out of that get another stroller small enough to fit on an airplane for when we travel.

Same situation here, living in a city and without a car. We were prioritizing getting a good and reliable stroller for the baby and decided on the Bugaboo fox 5. But we do want to take a few road trips over the summer during our paternity leave and probably also fly so we just looked up the car seat that works with the stroller base (Nuna turtle - 250$), it can be clipped in any car with the seat belts and on arrival attached to the stroller - so the bassinet doesn’t have to be carried too.

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

I went with the cheapest Nuna travel system. It was around $800 for both the infant car seat and stroller combined. I’m hoping it’s good enough quality that I can use it for my second. It’s honestly super nice… but getting a stroller and car seat that was green guard certified was a top priority for me. I don’t want my baby exposed to excess chemicals and flame retardant fumes. I really hated that it was so expensive though.

We use detailed drivers. They have Nunas and grecos. Like $25/car seat

For us, no. We have the Nuna. Babies just hate being confined. Mine screamed every time she was in her seat from 4 months to 9 months! We played around with the Chicco and Cosco seats too, to see if any would help (nope - they didn't!). We ended up switching to a Britax One4Life around the 4 month mark to give her more space and so she could sit up more and see the world, but still dealt with screaming. Same thing happened to my friend who used both the Chicco and Graco systems for their two cars. They will eventually grow out of the screaming - we tried to bring a lot of entertainment and snacks to distract her and it helped immensely. She's just over 2 years old now and chills in her carseat for trips so it will get better, I promise you!

I’m a CPST who has installed hundreds of car seats and dealt with every company’s customer service. Nuna is top tier.