Frontier Airlines vs Southwest Airlines

Cabin and carry-on baggage limits for Frontier Airlines and Southwest Airlines, side by side.

⚠ These figures are awaiting manual verification against the airline's official page. Treat them as preliminary.

Both Frontier Airlines and Southwest Airlines allow the same longest carry-on side (61 cm).

Frontier Airlines is more generous for personal items — up to 46 cm, versus 41 cm on Southwest Airlines.

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Enter your bag's dimensions to see how it fares against both airlines' carry-on limits.

Airline	Verdict	Fits as	Margin	Checked on	Source

Enter your bag's size above to see which airlines accept it.

Allowance	Frontier Airlines	Southwest Airlines
carryOn	61 × 41 × 25 cm · Not published · 15.9 kg per piece · 1 pc Published as 24 x 16 x 10 in (61 x 41 x 25 cm) and 35 lb (~15.9 kg). Not included on the Basic fare; must be purchased Carry-on 24 x 16 x 10 in / 35 lb. Not included on the Basic fare; must be purchased. Included on other fare types.	61 × 41 × 25 cm · Not published · Not published · 1 pc Free on all fares No published weight limit Carry-on up to 61x41x25 cm (24x16x10 in); free on all fares, no weight limit published.
personalItem	46 × 36 × 20 cm · Not published · Not published · 1 pc Published as 18 x 14 x 8 in (46 x 36 x 20 cm); no separate weight limit. Free on all fares Counts as the one included item Personal item 18 x 14 x 8 in, free on all fares, included as the one bag on Basic.	41 × 34 × 20 cm · Not published · Not published · 1 pc Free on all fares No published weight limit Personal item up to 41x34x20 cm (16.25x13.5x8 in); free on all fares.

Frontier Airlines

Official · unverified Last checked: 2026-10-11

Southwest Airlines

Official · unverified Last checked: 2026-10-11