How to Book Flights When Traveling with an Infant Under 2

Infants under 2 can fly free as lap children on domestic flights and for around 10% of adult fare internationally, but you'll need to add them to your reservation after booking your ticket. Call the airline directly or use their website's 'manage booking' feature to add the infant, as most booking sites don't handle this during initial purchase.

1. Book your adult ticket first. Purchase your flight normally through any booking platform. Don't worry about the infant yet - most booking engines can't handle infant passengers during initial purchase.
2. Add the infant to your reservation. Within 24 hours of booking, call the airline directly or log into their website and use 'Manage My Booking.' You'll need the infant's full name (exactly as it appears on their passport if traveling internationally) and date of birth. For domestic flights, birth certificate details work.
3. Understand the pricing structure. Domestic flights: infants fly free as lap children. International flights: expect to pay 10-15% of your adult fare plus taxes (usually $50-200 total). Some budget airlines charge full price for infant seats.
4. Decide on lap vs. seat. If you want to buy the infant their own seat (safer and more comfortable), book it as a child ticket and bring an approved car seat. This costs the full child fare but gives you guaranteed space and allows car seat use.
5. Request priority seating. When adding the infant, ask for bulkhead seats (more legroom) or aisle seats (easier for diaper changes). Many airlines will block middle seats next to families when possible.
6. Confirm documentation requirements. Domestic: birth certificate or hospital record showing age. International: passport required for infant, even newborns. Some countries require additional documentation - check destination requirements.

Can I book infant tickets on booking sites like Expedia?

Most third-party booking sites don't handle infant passengers. Book your adult ticket anywhere, then add the infant directly through the airline.

What if my baby turns 2 during the trip?

You must purchase a child seat for the entire journey if they'll be 2 on any flight segment. Airlines are strict about this policy.

Do I need to arrive earlier at the airport with an infant?

Add 30 minutes to your normal arrival time. Security takes longer with baby gear, and you might need gate-checking for strollers.

Can I change my infant's name after booking?

Name changes are usually allowed for infants since many travel before receiving official documents. Call the airline - most are flexible for babies under 6 months.

What happens if I don't add the infant to my reservation?

You cannot board without the infant properly ticketed. Airport ticket counters can add them, but expect long lines and potential complications.