BagRule Guides

Will My Bag Fit the Gate Sizer? A five minute home test that measures your packed bag the way the gate agent will, with every airline's limits in one table.

Personal Item or Carry-On? What Counts as Which Backpacks, purses, diaper bags, coats and pet carriers, sorted into personal item, carry-on or free, airline by airline.

Bags That Fit the Strictest US Airlines The one packed size that passes Frontier, Allegiant, Avelo, Breeze, Sun Country and basic economy, and the bag features that help.

Airline Bag Costs: Worked Examples for Real Trips Solo, couple and family trips priced bag by bag, with every line of math shown.

How to Avoid Airline Bag Fees the Legit Way Status, cardholder perks, military benefits and fare choice, with a break-even table for basic economy.

When to Pay Airline Bag Fees Why paying online, at the counter or at the gate can change what you pay for the same bag.

US Airline Bag Fee Changes in 2026 What changed this year and which booking dates the new fees apply to.

Overweight or Oversized Bag? What Happens Next What happens when your bag is over at the counter or your carry-on fails the sizer, and how fees stack.

Bag Rules on Connecting Flights How bag rules work when your trip has more than one flight or more than one airline.

Carry-Ons on Regional Jets What happens to your carry-on on smaller planes with smaller bins.

Basic Economy Carry-On Rules Which basic economy fares include a carry-on and which limit you to a personal item.

Strollers, Car Seats and Infant Bags What families can bring free on US airlines, from strollers to diaper bags.

Medical Devices in the Cabin How airlines treat CPAP machines, oxygen concentrators, mobility aids and other medical devices.

Sports Equipment Fees Fees and size rules for golf clubs, skis, bikes and surfboards on 12 US airlines.