Recently we flew as a family of 5 cross-country for a 1 week trip.
I packed all of our clothes for the week in ONE carry-on.
I did this for a multitude of reasons:
Each checked bag would cost $25.
We could have brought more carry-ons but with 3 children and a layover I wanted to make the flight as simplified as possible.
Minimalism helps us stay focused and organized; I did not want the extra baggage weighing us down- literally and figuratively.
I knew we would have access to a washer and dryer; therefore it seemed silly to pack outfits for all 7 days when we could just wash and repeat mid-way through.
How did we fit everything?
It helped that we were packing summer clothes that are light and small. If this had been a winter trip we would have most likely needed 2 carry-ons to fit all the bulky winter items.
Each of us got 4 outfits (including the one we were wearing on the airplane). 1 bathing suit, 4 pairs of undies.
Shoes on our feet, nothing more, nothing less.
We decided to buy new toiletries upon our arrival since liquids are restricted on planes anyways. We also only brought enough diapers to last us through 2 days and resupplied when we got there.
2 backpacks contained: snacks, kindles, laptop, headphones, chargers, coloring supplies for entertainment as well as our sweaters for chilly plane rides.