Yes, you can take a carry on bag and a backpack on almost every flight. Most airlines allow you to bring these two items as your personal carry-on allowance, provided they fit within specific size and weight limits. Check your airline’s website before heading to the airport to confirm their current policy.
Airline carry-on bag and backpack rules

Most major carriers permit one standard carry-on bag for the overhead bin and one personal item, such as a backpack, that fits under the seat in front of you. Always verify your specific ticket type, as some budget airlines limit carry-on bags based on the fare class you purchased.
| Your situation | Answer | Why |
|---|---|---|
| Standard economy ticket | Yes | Both items are usually included |
| Basic economy ticket | Check airline | Some limit you to one item |
| Regional small aircraft | Maybe | Overhead bin space is limited |
| International long-haul flight | Yes | Two bags are standard allowance |
| Flight with budget carrier | Fee applies | Extra bags often cost money |
| Traveling with an infant | Yes | Extra diaper bag is allowed |
What decides your bag allowance
The primary factor determining your baggage allowance is the specific fare class of your ticket and the rules set by your airline. While most full-service carriers include both a carry-on and a personal item, budget airlines often charge extra for the larger carry-on bag to keep base fares low. The size of the aircraft also plays a role; on smaller regional jets, the overhead bins may be too small for standard carry-on bags, requiring you to gate-check them.
Weight limits for these bags can vary significantly between airlines, with some domestic carriers in the United States allowing bags up to 40 pounds, while others have no set weight limit as long as you can lift the bag into the bin yourself. If your ticket is a restricted economy fare, then you’re limited to one personal item; if you have a standard or premium ticket, then you’re typically granted the full two-bag allowance.
How to manage your two bags

If you’re flying with both a carry-on and a backpack, follow these steps to ensure a smooth boarding process.
- Measure your bags before leaving home to ensure they meet the airline’s size requirements, typically 22 x 14 x 9 inches for carry-ons.
- Pack heavy items in your carry-on bag if you have a weight limit, as personal items are rarely weighed by gate agents.
- Place the backpack under the seat in front of you to keep the overhead bin space free for your larger carry-on bag.
- Keep travel documents in an easy-to-reach pocket on your backpack so you can access them quickly at security checkpoints.
- Verify gate-check policies for your specific flight, as the Federal Aviation Administration notes that some items may need to be checked if overhead space is full.
The mistake people make
The most common mistake is assuming that a “personal item” like a backpack can be any size. People often use oversized hiking backpacks that don’t fit under the seat, which forces them to gate-check the bag at the last minute. This often results in a significant fee or the risk of your bag being sent to your final destination instead of being available during a layover. Always check the dimensions on the airline’s website, as most personal items must be under 18 x 14 x 8 inches to qualify.
When to stop and get help
You should stop trying to manage your bags yourself if you encounter these situations:
- The gate agent explicitly tells you your bag is too large for the cabin.
- The airline staff demands you pay for an extra carry-on due to your specific fare class.
- You can’t physically lift your carry-on bag to shoulder height, as this is a safety risk to other passengers.
If you reach this point, speak directly to the gate agent to arrange a checked bag to avoid boarding delays.
Frequently asked questions

Can I take a carry on bag and a backpack if I fly budget?
It depends on your ticket, as many budget airlines charge extra for a carry-on bag while still allowing one free personal item. Check your booking confirmation to see if a carry-on is included in your fare.
Does my backpack count as a personal item?
Yes, a backpack counts as a personal item as long as it fits underneath the seat in front of you. If it’s too large, it will be treated as your main carry-on bag.
How long does it take to gate-check a bag?
It takes about 2 to 5 minutes at the boarding gate, depending on how quickly the ground crew can process your bag. You’ll receive a claim tag to retrieve your bag after landing.
Is it safe to put my laptop in my backpack?
Yes, it’s safe to keep your laptop in your backpack, and you should always keep it with you in the cabin. Never put expensive electronics in checked luggage, as the risk of damage or loss is much higher.
What happens if my carry on is too heavy?
You may be asked to check your bag if it exceeds the weight limit, which can incur a fee. Most airlines require you to lift your own bag, so test the weight before you leave.
Does it matter if my backpack is full?
It doesn’t matter how full your backpack is, provided it still fits under the seat. If the bag is overstuffed and can’t be squashed, it may be rejected as a personal item.
Conclusion
Start by measuring your bags against the airline’s specific size requirements before you drive to the airport. You should expect to breeze through boarding if both bags fit the guidelines, but if a gate agent stops you, it’s time to stop and pay for a checked bag.
