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Southwest Airlines Carry-On Rules & Size Limits (2026)

Last updated: May 1, 2026

Quick Answer

Southwest Airlines carry-on size limit: 24" × 16" × 10" (61 × 41 × 25 cm). Carry-on is free for all fares. Personal item: 18" × 14" × 8" (always free).

Size Limits at a Glance

Bag TypeSize (inches)Size (cm)Fee
Carry-On Bag24" × 16" × 10"61 × 41 × 25Free
Personal Item18" × 14" × 8"45 × 36 × 20Free

Weight Limit

No weight limit for carry-on or personal item

Carry-On Fee Details

Free for all fares — always

Overhead bin access: All passengers get full overhead bin access. No fare restrictions.

Personal Item Rules

Size: 18" × 14" × 8" (45 × 36 × 20 cm)

Examples: Purse, briefcase, backpack, laptop bag (must fit under seat)

Additional Items Allowed (Free)

  • Coat or jacket
  • Umbrella
  • Food and beverages
  • Reading material
  • Assistive devices
  • Child car seat (if child has ticket)

How Strictly Are Rules Enforced?

Lenient. Southwest has the most generous carry-on size (24x16x10) and rarely enforces strictly.

Expert Tips

💡 Southwest allows the largest carry-on of any US airline (24x16x10 vs 22x14x9)

💡 No weight limit means you can pack as heavy as you can lift

💡 Plus 2 free checked bags — Southwest is the best for baggage overall

💡 Board early (A group) to guarantee overhead bin space on full flights

Frequently Asked Questions

What size carry-on does Southwest Airlines allow?
Southwest Airlines allows a carry-on bag up to 24" x 16" x 10" (61 x 41 x 25 cm).
Is carry-on free on Southwest Airlines?
Free for all fares — always
What is Southwest Airlines's personal item size?
Personal item must be 18" x 14" x 8" (45 x 36 x 20 cm). Examples: Purse, briefcase, backpack, laptop bag (must fit under seat)
Does Southwest Airlines weigh carry-on bags?
No weight limit for carry-on or personal item

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