The expensive version of family travel is the comprehensive version: hotel rooms in every city, checked luggage for everyone, restaurant meals three times a day, and an itinerary dense enough that getting from place to place is the primary activity. A two-week family trip structured this way costs what it costs, and most families looking at the final number decide they can't do it often.
The minimalist version restructures the fundamental decisions (how you carry gear, where you stay, how you eat, how fast you move) in ways that change the cost substantially without removing the substance of the trip.
The One Bag Per Person Rule
Children can carry their own bags earlier than most parents expect. A 5-year-old can carry a small daypack with their own clothing, a stuffed animal, and activities for the plane. A 10-year-old can carry a 20-liter bag with a full week of clothing plus toiletries. An adult can carry a 26-liter bag with two weeks of clothing using the right packing approach.
The payoff: no checked luggage fees (which currently run $35 to $40 per bag per direction on most US carriers), no baggage claim time, and the ability to move quickly between transportation modes without managing a rolling cart of bags. For a family of four on a round trip, checked luggage alone can add $280 to $320 to the cost before the trip starts.
The carry-on constraint also disciplines packing. The items that don't fit in the bag don't come. This is a feature, not a limitation: most families arrive home having not used 30 to 40% of what they packed.
Slow Travel: Fewer Destinations, Lower Cost

The ambitious itinerary (8 cities in 14 days) costs more in transportation between cities, in nightly rates for short stays (which are higher than weekly rates), and in energy. Moving every two days with children is a particular kind of exhausting. Kids take time to settle; they do better in one place for several days than in a new place every night.
Slow travel for families: choose two or three destinations and spend 4 to 6 days in each. A 14-day trip with 5 days in one city, 4 days in a second, and 3 days in a third produces more actual depth of experience than 8 cities in the same period. Weekly apartment rates are typically 15 to 25% lower per night than nightly rates for the same property, so longer stays save money while also reducing the pace.
The Apartment Kitchen Advantage

For a family of four, a hotel room requires separate restaurant meals for every meal. An apartment with a kitchen means 8 to 10 of the week's 21 meals can happen in the apartment (breakfast every day and a few dinners) at grocery store prices rather than restaurant prices.
Grocery stores in a destination are also one of the most efficient ways to understand a place: what's seasonal, what's cheap locally, what the local food culture produces. A morning at a market and an evening cooking in the apartment produces an experience that doesn't appear in a restaurant.
The math: for a family of four, even modest restaurant pricing runs $50 to $80 per meal. Breakfast in the apartment costs $10 to $15. Doing this once per day saves $40 to $65 per day, or $560 to $910 over two weeks. This difference typically covers the entire accommodation cost difference between a hotel and a comparable apartment.
Managing Kids and Travel Pace
Children 3 to 10 need downtime built into travel days. A day with three museums, a landmark, a market, and a restaurant is a day that ends in meltdowns. A day with one significant experience, lunch, a playground or park, and an afternoon back at the accommodation ends in children who remember the main thing clearly.
The planning habit that works for most families with children: one anchor experience per day, morning or early afternoon, when children are freshest. The afternoon is slower: the accommodation, a walk, a park, ice cream. The pace is genuinely lower than what adults would do alone, and the trip is better for it because what gets experienced is actually absorbed.
The Activities Question

Children's admission fees at major tourist attractions add up. Most tourist economies have a mix of expensive ticketed experiences and free or low-cost experiences that children engage with equally or more: a harbor, a market, a neighborhood bakery, a beach, a park with interesting playground equipment, a street with buskers. Children at ages 4 to 8 often respond more to the sensory richness of a new city than to ticketed cultural experiences designed for adults.
The practical mix: one ticketed experience that genuinely suits the children's ages and interests (interactive museums, zoos, aquariums, and outdoor adventure experiences tend to hold children's attention better than art museums or historical sites), and primarily free experiences organized around the destination's natural and neighborhood character.
See also: budget travel tips every adventurer should know and minimalist travel packing list.
The Car Seat and Stroller Question

International travel with children under 4 involves a specific logistics question that doesn't arise with older children: car seats and strollers. Full-size travel systems are heavy, expensive to check, and often damaged in transit. Several alternatives exist that change the math.
For car seats: a lightweight travel car seat (specifically designed for air travel, certified for in-flight use as well as vehicles) is available from several manufacturers. These seats weigh 8 to 10 pounds rather than 20 to 30, fit in overhead bins, and cover both plane and car use at the destination. They cost more than a standard car seat but considerably less than the checked bag fees and the rental car seat fees they replace across multiple trips.
For strollers at the destination: a compact umbrella stroller (under $30 to $50 at most retailers) weighs 8 to 12 pounds, fits in overhead bins on some carriers or checks without fees on most, and handles typical tourist-destination terrain. Leaving the full-size stroller at home reduces checked bag weight and check-in complexity significantly.
What "Family Travel" Means at Different Ages
The calculus for minimalist family travel shifts considerably across the child age ranges.
Under age 2: The child's needs are simple (food, sleep, familiar comfort items, a stroller for rest), but the gear load from parents tends to be high. The mistake is packing for every contingency. Babies are adaptable; the right approach is bringing less than you think you need, knowing the destination has pharmacies and stores.
Ages 3 to 7: This is the hardest travel age: children have strong preferences but can't always articulate or manage them. The remedy is shorter travel days, predictable meal timing, and one manageable experience per day rather than an ambitious itinerary.
Ages 8 and up: Children can carry their own bags, have genuine preferences for activities, and participate in planning. Travel is genuinely easier with children in this range than in the younger years.