Southwest Airlines carry on policy balances flexibility with clear size and fee rules for personal items and standard bags. Understanding these guidelines helps you move through the gate smoothly and avoid last minute add on charges.
This guide breaks down the most relevant parts of the Southwest carry on policy, from cabin baggage dimensions to boarding groups and exceptions. Use it as a practical reference the next time you book or pack for a trip.
| Item | Personal Item Max Size | Standard Checked Bag Fee | Notes |
|---|---|---|---|
| Personal Item | 18 x 14 x 8 inches | Included in fare | Must fit under seat |
| Standard Checked Bag | Up to 50 lb | First bag fees apply | Online or kiosk pricing |
| Additional Checked Bag | Same limits | Higher than first bag | Pricing increases per bag |
| Small Sports Equipment | Within checked limits | Checked bag fee applies | May require boxing |
Personal Item Requirements And Dimensions
Size Limits For Cabin Bags
Your personal item must fit completely under the seat in front of you. Southwest specifies maximum dimensions of 18 inches high, 14 inches wide, and 8 inches deep. Exceeding any of these measurements may require checking the item.
Common Examples Allowed
Purse, laptop bag, small backpack, and briefcase typically qualify as personal items if they meet the size limits. Use the seat measurement guide at the gate if you are unsure whether your item will fit.
Standard Checked Bag Rules And Fees
First Versus Additional Bags
On most fares, the first checked bag incurs a fee, while additional checked bags cost more. Fees vary by route and purchase timing, so checking early can save money.
Weight And Special Items
Each checked bag must not exceed 50 pounds. Items such as sports gear and musical instruments often follow the same weight rules but may need special packaging or boxing.
Baggage Fees And Payment Options
Where Fees Apply
Baggage fees are common on Southwest unless your fare type includes checked bags. Fees are charged per bag and can differ between online purchase, mobile app, kiosk, and ticket counter.
Payment And Exceptions
Prepaid options like Rapid Pass or early bag purchases can reduce costs at check in. Certain groups, such as active duty military, may qualify for exceptions that lower or waive bag fees.
Boarding Process And Group Assignments
How Boarding Groups Work
Boarding groups range from A1 to E6 and are assigned based on fare type, time of check in, and status. Higher boarding groups generally get earlier access to overhead bins, helping reduce gate congestion.
Carry On Timing At The Gate
Gate agents verify size and compliance before you board. Items that do not fit under the seat or in overhead bins may be checked at the gate for an additional fee when space permits.
Tips For Avoid Baggage Issues
- Measure your personal item before leaving home to confirm it meets 18 x 14 x 8 inches.
- Check bag fee prices online early and consider purchasing during a sale.
- Arrive at the gate with enough time to scan boarding group and bin space.
- Use a lightweight, packable bag that compresses if overhead space is tight.
- Label checked bags with contact information in case they are delayed.
FAQ
Reader questions
Can my personal item be a backpack that is slightly over the stated limits?
Backpacks that exceed 18 x 14 x 8 inches may be checked at the gate or required to be checked at the ticket counter, potentially incurring a fee.
Are checked bags always paid at the airport kiosk or counter?
You can often pay for checked bags online, through the mobile app, at kiosks, or at the counter, with pricing typically lowest for early purchases.
What happens if my bag is heavier than 50 pounds?
Bags over 50 pounds may be charged at a higher rate or refused as checked baggage, so weighing items at home helps avoid surprises.
Do boarding group assignments affect carry on access to overhead bins?
Later boarding groups sometimes face fuller overhead bins, making it more likely that compliant checked bags will be required at the gate.