When preparing for your flight with United Airlines, knowing the rules around carry-ons and personal items can save you time, stress, and unexpected fees. One of the most common questions travelers ask is: “What is the personal item size limit on United Airlines?” This article breaks down everything you need to know about United Airlines’ personal item size, what qualifies, and how to avoid any last-minute surprises at the gate.
What Is Considered a Personal Item on United Airlines?
On United Airlines, a personal item is any small bag that fits under the seat in front of you. This is separate from your carry-on, which typically goes in the overhead bin.
According to United, acceptable personal items include:
- A backpack
- A purse
- A laptop bag
- A briefcase
- A camera bag
- A diaper bag
United Airlines allows one personal item per passenger (plus other specific exceptions, like medical or assistive devices).
United Airlines Personal Item Size Limit
As of 2025, United Airlines’ official personal item size limit is:
9 inches x 10 inches x 17 inches (22 cm x 25 cm x 43 cm)
This size limit includes handles and wheels if your bag has them. To avoid issues, make sure your personal item can slide completely under the seat in front of you.
Tip: Use a measuring tape to check your bag’s dimensions before you pack.
Examples of Acceptable Personal Items
Here are some examples of bags that typically meet United’s personal item size requirements:
| Type | Example |
|---|---|
| Small Backpack | Herschel Settlement Mini, Fjällräven Kånken |
| Tote Bag | Longchamp Le Pliage Small Tote |
| Laptop Bag | Samsonite Classic Business Slim Brief |
| Sling or Crossbody | Patagonia Atom Sling 8L, Away F.A.R. Crossbody |
| Diaper Bag | Skip Hop Forma Backpack Diaper Bag |
These bags are known for fitting easily under the seat and are airline-approved in terms of size.
What Happens If Your Personal Item Is Too Big?
If your personal item exceeds the allowed size, United Airlines may:
- Ask you to check it at the gate (you might have to pay a fee).
- Count it as your carry-on item, leaving no room for another bag.
- Charge you for overhead bin access if you’re flying on a Basic Economy ticket (which doesn’t include a carry-on).
At busy airports or on full flights, gate agents may enforce sizing more strictly. Be prepared.
Tips for Choosing the Right Personal Item
Choosing a compliant personal item doesn’t mean sacrificing style or function. Here are some smart packing tips:
✅ Measure Before You Fly: Don’t rely on brand claims. Measure your bag fully packed.
✅ Use Compression Packing Cubes: They help maximize space in a small bag.
✅ Choose Flexible Materials: Soft-sided bags are more likely to fit under a tight seat space.
✅ Avoid Overstuffing: Even if your bag is technically within the limit, an overstuffed bag may not fit.
✅ Look for “Airline-Approved” Tags: Many luggage brands now sell bags specifically labeled for personal item use.
How United’s Policy Compares to Other Airlines
Here’s a quick comparison of personal item size limits across major U.S. airlines:
| Airline | Personal Item Size Limit |
|---|---|
| United Airlines | 9 x 10 x 17 inches |
| American Airlines | 8 x 14 x 18 inches |
| Delta Air Lines | No published limit; must fit under seat |
| Southwest Airlines | 16.25 x 13.5 x 8 inches |
| JetBlue | 8 x 13 x 17 inches |
As you can see, United’s size limit is slightly smaller than some competitors, so double-check your bag if you’re switching airlines.
Frequently Asked Questions
Can I bring a backpack as a personal item on United?
Yes, as long as the backpack fits under the seat and is within the 9 x 10 x 17-inch limit. Many small or medium backpacks qualify.
Does United check personal item size at the gate?
They can, especially if your bag looks large or the flight is full. Gate agents may ask you to place your bag in a sizing bin.
What if my personal item doesn’t fit under the seat?
If it’s too large, you’ll likely need to check it or treat it as a carry-on (which may incur extra fees, especially in Basic Economy).
Final Thoughts
Traveling with only a personal item can save you time and money, especially on short trips. By understanding United Airlines’ personal item size policy and planning accordingly, you can breeze through boarding without worry.
Remember:
- Stick to 9 x 10 x 17 inches
- Choose soft, compact bags
- Check policies before every flight (as they may change)
Flying light is always in style—especially when you’re within the rules.
You May Also Like: Finding Joy in the Little Travel Moments
