Yes, you can take a carry on and backpack on almost every flight. Whether you can take a carry on and backpack together for free depends entirely on your specific airline’s cabin baggage policy regarding personal items. You should check your ticket details before heading to the airport.
Can you take a carry on and backpack
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Most airlines allow one carry-on bag and one personal item, such as a backpack, per passenger. The carry-on bag usually goes in the overhead bin, while the backpack must fit under the seat in front of you.
| Airline Situation | Allowed Together | Note |
|---|---|---|
| Major US carrier | Yes | One bag plus one personal item |
| Budget airline | Yes | Personal item must fit under seat |
| Basic economy ticket | Yes | Some carriers charge for overhead bin |
| Regional flight | Sometimes | Small planes have limited bin space |
| International long-haul | Yes | Check weight limits on your ticket |
| Connecting flights | Yes | Rules apply to the full journey |
Why Airlines Limit Your Bags
The primary reason for these limits is the physical space available in the aircraft cabin. Overhead bins are designed to hold a specific volume of luggage, and the space under the seats is limited by the seat structure and the need for clear floor paths. If every passenger brought two large bags, the overhead bins would run out of space, making boarding and cabin stowage impossible. The Federal Aviation Administration provides guidelines on how items must be stowed to ensure passenger safety during takeoff and landing.
Weight limits for these items vary significantly between carriers. While some airlines don’t weigh personal items, others have strict limits of 15 to 22 pounds for total cabin baggage. If your backpack is too large to fit under the seat, the crew may require you to check it at the gate, which often carries a fee. If the bag fits under the seat, you keep it; if it’s too large for the overhead, you pay a gate fee.
How to Pack for Two Bags
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Follow these steps to ensure you stay within the allowed limits for your flight.
- Measure your backpack to ensure it fits under the seat, which typically means a height of 18 inches, a width of 14 inches, and a depth of 8 inches.
- Check the airline website for the specific weight limit of your cabin bags, as these numbers vary by carrier and ticket class.
- Pack heavy items in the carry-on to keep your backpack light and easy to handle while moving through the terminal.
- Place essential items in the backpack such as your passport, medications, and electronics so you have them at your seat.
- Confirm the gate check policy for your flight, as regional jets often require passengers to check their carry-on bags at the boarding door.
The Most Common Packing Mistake
Many travelers assume that because they can carry two bags, they can bring any size of luggage. This mistake often results in hefty gate fees because the bag is too large for the overhead bin or the under-seat space. To avoid this, always measure your bags before you leave home. If your backpack is stuffed so full that it can’t be squashed to fit under the seat, you’re likely to be flagged by the gate agent. A bag that’s too rigid to flex is a common cause for forced gate checking.
When to Seek Professional Assistance
You should stop trying to manage your luggage yourself if you face these situations.
- If your luggage exceeds the weight limit stated on your booking, you must pay for checked baggage at the counter.
- If you’re traveling with medical equipment that requires special handling, contact the airline’s disability assistance desk.
- If you have items that trigger security alarms, speak with the airport security officers directly.
These issues require staff intervention to ensure compliance with aviation safety regulations.
Frequently asked questions

Can I take a carry on and backpack for free?
Yes, you can take both for free on most major airlines, provided your backpack is classified as a personal item and fits under the seat. Always verify your specific ticket class rules.
How big can my backpack be?
Your backpack should generally be no larger than 18 by 14 by 8 inches to fit under most airline seats. Check your airline’s website for the exact dimensions allowed for your specific flight.
Does my backpack count as my carry on?
No, your backpack is usually considered a personal item, while your carry-on bag is the one stored in the overhead bin. Each airline defines these categories differently in their carriage conditions.
What happens if my backpack is too big?
If your backpack is too big to fit under the seat or in the bin, the airline may force you to check it at the gate. This often results in a fee for oversized luggage.
Can I bring a laptop in my backpack?
Yes, you can bring a laptop in your backpack, and it’s often recommended to keep electronics in your personal item. Keep it accessible for security screening at the airport checkpoint.
Is it safe to put my backpack in the overhead bin?
Yes, it’s safe to put your backpack in the overhead bin if there’s space available. However, ensure you remove any essential items before the flight takes off.
Conclusion
Start by checking your airline’s official baggage policy page for the exact dimensions allowed for your cabin items. You’ll know you have the right setup when both bags fit easily into the designated storage areas. If a gate agent tells you to check a bag, follow their instructions immediately.
