
Joolz
Aer+
Travel-friendly, city-nimble, but tiny storage and struggles off-pavement.

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Check out the mountain buggy nano. It has a seat belt that goes around the infant car seat and is basically a universal adaptor. It also fits in the overhead compartment. I have one as our travel/car stroller and it’s a decent and sturdy option. You can get the V2 for $280 on their website: https://ca.mountainbuggy.com/shop/nano-v2-2015-11440?gad_source=4&gad_campaignid=17335605012&gclid=CjwKCAiAlfvIBhA6EiwAcErpyRokNCNax7AQ9vg0cVT_zecxJoacpxQsT4NlpwE11B2Xlam5C4s-ThoCU3kQAvD_BwE
I loved our Mountain Buggy Nano for travel, you can probably find one secondhand online or if there's a Once Upon A Child consignment shop near you.
We have an uppababy Cruz with aria car seat and a mountain buggy travel stroller. We take our kid to travel and the mountain buggy is much easier to carry than the Cruz.
I got the Uppababy Cruz 2 for my first (with the hope we’d have a second with a ~2 year gap) - I didn’t like the the double configuration for the Vista (with bassinet at the bottom) and liked the smaller profile of the Cruz. Figured we’d reassess the pram situation if/when the next baby came along. Second baby is now 5 months old, and we got a piggyback board a few weeks ago which has been working great when taking both kids out by myself (though less successful if dad is with us, as our 2.5 year old then wants to be carried 🙃). We also have a Mountain Buggy travel stroller dad has been using for almost 2 years, and still uses when taking our older one out on his own, so at this stage we’re not looking at a double.
Get something you can fold up and sling over your shoulder. With our toddler, I used a very lightweight Mountain Buggy that folded up to fit in an overhead compartment. You won't see too many 4 year olds in a stroller over there, but it'll be worth it. It'll allow you to see more and do more, even when the kid is sleeping or jetlagged. Just build in extra time in your itinerary because navigating crowded areas will slow you down, especially when you have to find the only elevator at a train station, which may lead to an inconvenient exit.
We have the Mountain Buggy Nano which does “fit” the Cosco Scenera. For whatever reason, our 3yo has decided it’s her preferred stroller over our Uppababy so we’ve used it A LOT in the past few months. As an everyday stroller, it’s just ok. I miss the Uppababy’s much smoother ride. The big plus is that our kid really likes it. It’s a little small. I’m 5’8” and it’s a hair too short for me. Both my husband and I have accidentally engaged the brake by taking a big step. The folding/unfolding mechanism is not intuitive, and requires two hands and emptying out nearly all the storage, so it’s best used like a regular stroller that you happened to bring on a plane or in a car, it’s not something that makes trains and buses that much easier other than being lightweight.
We have a Cosco Scenera seat mainly for getting to and from airports, occasionally to get around the city. Our strollers are an Uppababy Vista, which can accommodate the car seat in the basket, and the Mountain Buggy Nano which has a universal infant car seat attachment system and a supposedly popular toddler carseat attachment hack. All that being said, we almost never go anywhere that requires that we lug the car seat with us at the destination. It’s too much equipment. These clever travel ideas don’t account for all the toddler stuff we have to carry around anyway, so getting either stroller perfectly packed so that they can go into a car trunk without raining out a bag’s worth of stale cracker crumbs only happens if we’re flying. What we actually do is 1) check if the destination has coat check or stroller parking to leave the car seat there, 2) figure out how to get there via public transportation with the travel stroller and/or a toddler carrier (apparently I’m often the only person that’s ever worn a 2yo because people were constantly surprised to see my giant monster of a child looming over them), or we put off going until kid is out of the car seat and ready for a booster/harness. Our wishlist of city destinations isn’t that long, just take the subway.
We have the mountain buggy nano as our travel stroller and it’s just ok for the price. Honestly surprised it won design awards because it does not fold and unfold easily.

Joolz
Aer+
Travel-friendly, city-nimble, but tiny storage and struggles off-pavement.

Bugaboo
Butterfly Series
Durable, compact for city travel, good storage, but expensive.

UPPAbaby
Cruz V2 Stroller
Durable workhorse with massive storage, but heavy and bulky.

UPPAbaby
Minu V3 Stroller
Compact travel, decent storage, but pricey, seat not upright.

UPPAbaby
Cruz V3
Durable, massive storage, great service, but heavy and bulky.

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