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Complete Guide to Airline Carry-On Restrictions (2025): Size Limits, Rules & Tips
July 1, 2025
Key Takeaways
- Standard carry-on size for most U.S. airlines is 22" x 14" x 9"
- TSA's 3-1-1 rule limits liquids to 3.4 oz containers in one quart-sized bag
- Most airlines allow one carry-on bag plus one personal item
- Exceptions exist for medications, baby food, and duty-free purchases
- Size and weight restrictions vary by airline and route
Understanding Airline Carry-On Size Restrictions
Navigating airline carry-on restrictions can feel like solving a puzzle. Whether you're a frequent flyer or planning your first trip, knowing the exact requirements for your carry-on luggage can save you time, money, and stress at the airport. This comprehensive guide breaks down everything you need to know about airline carry-on restrictions in 2025.
Standard Carry-On Size Limits by Major U.S. Airlines
Alaska Airlines
- Carry-on size: 22" x 14" x 9" (including wheels and handles)
- Total dimensions must not exceed 45 inches
- No specific weight limit
- Free carry-on and personal item allowed
American Airlines
- Carry-on size: 22" x 14" x 9" (including handles and wheels)
- Personal item: 18" x 14" x 8"
- No weight restrictions
- Available for all fare types
Delta Air Lines
- Carry-on size: 22" x 14" x 9"
- Total dimensions must not exceed 45 linear inches
- Weight limits apply only for Singapore (15.4 lbs), Beijing (22 lbs), and Shanghai (22 lbs)
- Personal items include purses, laptops, and small backpacks
JetBlue
- Carry-on size: 22" x 14" x 9"
- Personal item: 17" x 13" x 9"
- No weight limits
- Basic Blue fares restricted to personal item only (except Mosaic members)
Southwest Airlines
- Carry-on size: 24" x 16" x 10"
- Personal item: 18.5" x 8.5" x 13.5"
- No published weight limits
- Includes generous free checked bag allowance
United Airlines
- Carry-on size: 22" x 14" x 9"
- Personal item: 17" x 10" x 9"
- Basic Economy limited to personal item only
- Exceptions for premium members and credit card holders
TSA Liquid Restrictions and the 3-1-1 Rule
Understanding the 3-1-1 Rule
The TSA's 3-1-1 rule remains a crucial part of air travel security:
- 3.4 ounces (100ml) maximum per container
- 1 quart-sized clear bag
- 1 bag per passenger
Important Exemptions to Liquid Restrictions
- Medical Necessities
- Baby Care Items
- Duty-Free Purchases
Special Considerations and Tips
Prohibited Items
- Flammable materials (except cigarettes and lighters)
- Sports equipment restrictions
- Weapons and sharp objects
Expert Tips for Carry-On Success
- Measure your bag before heading to the airport
- Pack liquids in easily accessible locations
- Consider TSA PreCheck for expedited screening
- Check airline-specific rules when booking
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Frequently Asked Questions
What is the standard carry-on size for most airlines?
The most common carry-on size limit is 22" x 14" x 9", including wheels and handles.
Can I bring liquids over 3.4 oz in my carry-on?
Only if they're medically necessary, baby-related items, or duty-free purchases.
Do all airlines allow a personal item plus a carry-on?
Most do, but basic economy fares often restrict passengers to just a personal item.
What happens if my carry-on is too large?
You may need to check it at the gate and pay additional fees.
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Editorial Disclosure: Opinions expressed here are those of Kudos alone, not those of any bank, credit card issuer, hotel, airline, or other entity. This content has not been reviewed, approved or otherwise endorsed by any of the entities included within the post.
