Backpack
Backpacks aren't restricted by TSA — most airlines accept a backpack as your personal item or carry-on if it fits under the seat or their size limits.
Carry-on
Allowed
Checked
Allowed
Carry-on details
Allowed. TSA places no security restriction on backpacks — they're screened the same as any other bag. Whether it counts as your free "personal item" or your "carry-on" depends on your airline: personal items generally need to fit under the seat in front of you, while carry-ons go in the overhead bin. Size limits for each category vary by airline, so check your carrier's policy if your backpack is large.
Checked-bag details
Allowed. A backpack can be checked like any other bag, subject to your airline's standard checked-baggage size and weight limits.
Special instructions
TSA doesn't define "personal item" — that distinction and its size limit come entirely from your airline, so confirm your carrier's rule before relying on a backpack as your free item.
FAQ
- Can I bring a backpack as my personal item instead of a purse or laptop bag?
- Usually, yes — most airlines accept any bag as your personal item as long as it fits under the seat in front of you and stays within their size limit. Limits vary by airline, so check before you fly.
- Does TSA check backpacks differently than suitcases?
- No. A backpack goes through the same X-ray screening as any other carry-on bag. The contents inside — liquids, electronics, sharp items — follow the normal rules regardless of what kind of bag they're packed in.
Related items
Source: TSA — What Can I Bring? · Last verified: 2026-07-31
Final decision rests with the security officer at the checkpoint.