Guide
Family flight search: seats together, bags, and nonstop tips
Flying with kids is not the same as flying solo. Here's everything you need to know about finding the best family flights — without paying more than you should.
The family travel math problem
A solo traveler can optimize for headline fare alone. A family of four cannot. You have bags (strollers, car seats, checked luggage), a strong preference for seats together, and a meaningful preference for nonstop routes when traveling with young children. Each of these adds cost that the base fare ignores.
Spotvoy is built with this in mind. When you specify your traveler count and bags, we apply that context to every flight we evaluate.
Airline by airline: what families need to know
Southwest
Tip: Best value for bag-heavy families. Book EarlyBird Check-In (~$15–25 each way) to board first and pick seats together.
Alaska Airlines
Tip: Best for Pacific Northwest families. Alaska card makes bags free and they have solid family boarding policies.
Delta
Tip: Book Main Cabin or higher. Basic economy on Delta does not allow seat selection and is not family-friendly.
United
Tip: Similar to Delta — avoid basic economy. Main Cabin fares include seat selection and are manageable.
American
Tip: AAdvantage credit card provides free bags. Otherwise bag costs are comparable to Delta/United.
Frontier / Spirit
Tip: Almost never the real value winner for families once bags and seats are added. Spotvoy's true cost calculator usually surfaces this quickly.
Nonstop vs. connecting with kids
A connecting flight might save $80 per person but costs you 3 additional hours, the stress of a tight connection with a stroller, and the risk of missing your connection and spending the night in Denver. For most families, nonstop is worth a premium.
A good rule of thumb: nonstop is worth up to $50–75 more per person on flights under 3 hours and up to $100–150 more on longer flights when traveling with children under 8.
Timing tips for family travel
- →Book 3–6 weeks in advance. Family leisure travel is price-sensitive at 6+ weeks and 0–2 weeks. The 3–6 week window often has the best fares.
- →Tuesday–Thursday departures. Weekend departures are 10–25% more expensive on most routes. If school schedules allow, midweek travel saves meaningfully.
- →Avoid holiday peak windows. Thanksgiving (Wed–Sun), Spring Break (middle 2 weeks of March–April), and Christmas week are peak pricing periods. Even shifting by 1–2 days can save $100+/person.
- →Early morning flights have the highest reliability. First flights of the day have the lowest delay rates because the aircraft hasn't accumulated delays from earlier segments. With kids, this trade-off is often worth it.
Use Spotvoy for family searches
When you tell Spotvoy you're searching for a family trip, it applies your traveler and bag count to every comparison, flags nonstop options prominently, and surfaces the most family-friendly fare classes. Just tell it what you need in plain language.
Search family flightsCommon family travel questions
Which airlines are most family-friendly for domestic flights?
Southwest is generally the most family-friendly for bags (two free) and seat flexibility (no assigned seats — families board early in Group A or B). Alaska Airlines has strong family boarding policies and free bags with their card. Delta and United have family-friendly policies on paid fares, but basic economy seats are harder to control.
Are airlines required to seat children with parents?
US law requires airlines to seat children 13 and under adjacent to an accompanying adult at no extra charge — but this requires you to contact the airline, and it's enforced inconsistently. Spotvoy flags which fares make this easier and which require advocacy with the airline.
What is the cheapest way to fly with a baby?
Lap infants (under 2) fly free on domestic routes — you pay nothing for their fare. You'll need to call or contact the airline to add a lap infant to your reservation. If the flight is not full, bring the car seat and they may give you a free seat. Always book a seat if you want to guarantee a safe car seat spot.
Should I pay for seat selection for my family?
Yes, in most cases. For families with young children, paying $15–25 per seat to guarantee seats together is almost always worth it. The alternative — hoping the airline reassigns seats at check-in — is stressful and unreliable. Southwest's open seating is the exception: board early (purchase EarlyBird or use A-List status) and you'll easily get seats together.
How does Spotvoy help with family searches?
Spotvoy takes your bag count and number of travelers into its true cost calculation. It flags nonstop options, notes when seats-together selection is difficult on a given fare, and surfaces nearby airport options that reduce ground transport stress with kids.
How do I get cheap flights for a family?
Start with true total cost, not headline fare: a family of four checking bags can pay $150–300 more than the advertised price on ultra-low-cost carriers. Compare Southwest (two free bags), book midweek, search nearby airports to cut ground transport time with kids, and pay for seat selection when you need guaranteed seats together. Spotvoy applies bag count and traveler count to every result so you see which option is actually cheapest for your family.
What is the cheapest way to fly with kids?
Lap infants under 2 fly free domestically (contact the airline to add them). For older kids, Southwest's free bags and family boarding often beat a lower base fare once fees are added. Nonstop flights reduce missed-connection stress. Avoid basic economy if you need seat control — the $20–40 you save per seat rarely outweighs the hassle of split seating.