Southwest Checked Bag Size Limits 2026
Understanding Southwest Airlines' baggage size restrictions is crucial for avoiding oversize fees. This comprehensive guide explains the 62-inch standard, how to measure linear inches, and when larger bags are permitted.
Southwest Size Limit Breakdown
Standard Size
≤ 62 inches
No additional charges for bags at or under this size (subject to standard baggage fees based on status/fare)
Example: 27" x 21" x 14" suitcase = 62 linear inches
Oversize
63-80 inches
+$200 surcharge per bag in addition to standard baggage fees
Example: 32" x 26" x 18" = 76 linear inches
Not Accepted
> 80 inches
Bags exceeding 80 linear inches will not be accepted as checked baggage
Must ship via cargo or reduce size
How to Measure Linear Inches
Linear inches (also called total dimensions) is the sum of your bag's length, width, and height. Here's how to measure correctly to avoid surprises at the airport.
Measuring Your Luggage: Step-by-Step
- 1
Identify the Longest Side (Length)
Stand your bag upright. Measure from the bottom to the top - this is typically the longest dimension.
- 2
Measure the Width
Measure the widest part of your bag from side to side (parallel to the ground when standing).
- 3
Measure the Depth
Measure from front to back. This is usually the smallest dimension.
- 4
Include Everything
Measure handles, wheels, and any protruding parts. The measurement includes all external features.
- 5
Add Them Up
Length + Width + Depth = Linear Inches. Example: 28" + 20" + 12" = 60 linear inches (acceptable).
Common Suitcase Sizes & Linear Inches
Here's how popular luggage sizes translate into linear inches to help you choose the right bag for Southwest flights.
| Bag Type | Typical Dimensions | Linear Inches | Status |
|---|---|---|---|
| Small Checked (23") | 23" x 15" x 10" | 48" | ✓ Accepted |
| Medium Checked (25") | 25" x 18" x 11" | 54" | ✓ Accepted |
| Large Checked (27") | 27" x 21" x 14" | 62" | ✓ At Limit |
| Extra Large (29") | 29" x 20" x 13" | 62" | ✓ At Limit |
| Oversized (32") | 32" x 22" x 14" | 68" | ⚠ +$200 fee |
| Golf Travel Bag | 50" x 14" x 10" | 74" | ⚠ +$200 fee |
| Ski Bag (double) | 75" x 12" x 8" | 95" | ✗ Not accepted |
Oversize Fees: How They Work
The $200 oversize surcharge is in addition to your standard baggage fees. Understanding how these fees combine helps you budget correctly.
Example Fee Calculations
Scenario 1: Regular Passenger, 70 Linear Inch Bag
- • First bag base fee: $35
- • Oversize surcharge (63-80"): +$200
- Total cost: $235
Scenario 2: A-List Member, 60 Linear Inch Bag
- • First bag base fee: $0 (free with status)
- • Oversize surcharge: $0 (bag is 62" or less)
- Total cost: $0
Scenario 3: A-List Member, 75 Linear Inch Bag
- • First bag base fee: $0 (free with status)
- • Oversize surcharge (63-80"): +$200
- Total cost: $200
Size Limits by Passenger Type
Standard Passengers
- • Standard limit: 62 linear inches
- • Oversize surcharge: $200 for 63-80 inches
- • Maximum size: 80 inches (not accepted above)
- • Applies to: All fare types (Basic, Choice, Choice Preferred, Choice Extra)
Active-Duty Military
- • Size limit: 80 linear inches
- • No surcharges: Oversize fees waived
- • Unlimited bags: All bags up to 80 inches
- • ID required: Valid military ID at check-in
Special Items & Size Exceptions
Certain sports equipment and special items have unique size considerations even though they count as checked baggage.
| Item Type | Size Allowance | Oversize Fee? |
|---|---|---|
| Golf clubs | Usually 62+ inches | Yes, $200 if over 62" |
| Skis (1 pair) | Usually 70-80 inches | Yes, $200 if over 62" |
| Snowboard | Usually 60-70 inches | Yes if over 62" |
| Surfboard (up to 10ft) | 120 linear inches max | $75 fee (different policy) |
| Bicycle (boxed) | 62 inches if in case | Yes, $200 if over 62" |
What Happens If Your Bag Is Oversize?
At the Check-In Counter
When you check your bag, Southwest will measure it using a sizing template or tape measure. Here's what happens if your bag exceeds the size limit:
63-80 Linear Inches
You'll be charged the $200 oversize surcharge. You can pay and check the bag, or if you have time, you might be able to transfer items to a smaller bag or remove external attachments.
Over 80 Linear Inches
The bag will be rejected for air transport. You must reduce the size by removing items, ship it separately via cargo, or leave it behind. Southwest cannot accept bags over 80 inches under any circumstances (except surfboards with special handling).
Tips to Avoid Oversize Fees
Before You Buy Luggage
- • Check manufacturer specs - look for linear inch dimensions
- • Buy bags marketed as "airline compliant" or "62 linear inches"
- • Avoid bags labeled "extra large" or "oversized"
- • Consider spinner wheels add 2-3 inches to depth
- • Hardshell cases may measure larger than soft-sided
- • Read reviews mentioning airline size compliance
Before You Travel
- • Measure your bag at home with a tape measure
- • Include wheels, handles, and external pockets
- • Remove external straps or attachments if possible
- • Don't overstuff - bulging bags measure larger
- • Use compression straps to minimize dimensions
- • Keep receipt showing bag dimensions if questioned
62-Inch vs 80-Inch: When Does It Matter?
Understanding the difference between the 62-inch standard and the 80-inch maximum is important for different types of travelers.
Who Benefits from Knowing the 80-Inch Limit?
- Active-duty military: Can use the full 80 inches without fees - ideal for PCS moves
- Ski travelers: Need to know the maximum for ski bags that typically run 70-75 inches
- Golf travelers: Golf travel bags often exceed 62 inches but stay under 80
- Long-term travelers: Those willing to pay $200 extra for a larger bag on extended trips
Carry-On Size Limits
While this guide focuses on checked baggage, it's worth noting Southwest's carry-on size restrictions to complete your packing strategy.
Carry-On Bag Dimensions
Maximum size: 10" x 16" x 24" (length + width + height = 50 linear inches)
This must fit in the overhead bin. Southwest is generally lenient, but bags are checked at the gate if overhead bins are full.
Personal Item (Fits Under Seat):
18.5" x 8.5" x 13.5" - Purse, briefcase, small backpack
Common Questions About Bag Size Limits
Does Southwest measure every checked bag?
Not every bag is measured, but Southwest gate agents can and do measure bags that appear oversized. They have sizing templates and tape measures. It's not worth the risk - measure your bag before traveling to avoid surprises.
Can I remove my wheels to make my bag smaller?
Technically yes, but it's impractical and Southwest measures bags in their normal state with all components attached. It's better to choose a properly-sized bag from the start rather than trying to modify it at the airport.
What if my bag measures exactly 62 inches?
A bag measuring exactly 62 linear inches is accepted at the standard rate with no oversize fee. At 63 inches or above, the $200 surcharge applies. There's no grace margin - aim for 61 inches or less to be safe.
Do duffel bags get measured the same way?
Yes. All checked bags - hardshell, soft-sided, duffel, or backpack - are measured the same way (length + width + height). Soft bags are measured at their fullest point, so don't overstuff them as this increases dimensions.
Can I check a bag that's exactly 80 inches?
Standard passengers can check a bag up to and including 80 inches, but will pay the $200 oversize surcharge (plus base bag fee). Active-duty military can check 80-inch bags at no charge. Anything over 80 inches is rejected.
Are there size limits for international Southwest flights?
Southwest maintains the same size restrictions for international flights to Mexico, Central America, and the Caribbean: 62 inches standard, 63-80 inches with $200 fee, over 80 inches rejected.
Calculate Your Total Baggage Cost
Use our free calculator to determine exact baggage fees including size and weight surcharges. Get an instant estimate based on your status, number of bags, and dimensions.
Calculate My Fees →All information provided is for general informational purposes only and is based on publicly available data. Fee information was last verified against official Southwest baggage policy in March 2026. While we strive to keep the information accurate and up-to-date, we make no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability, or availability of the information contained on this website.
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