Southwest Airlines vs Sun Country Airlines: fleets and facts compared

Southwest's help centre sets out these limits. Sizes and weights only; since 28 May 2025 checked bags are charged on most fares, so check what your fare includes.

• Carry-on bag: one bag of up to 24 x 16 x 10 inches (length x width x height), including wheels, handles and attachments. It goes in the overhead bin.
• Personal item: one item that fits under the seat in front, such as a purse, briefcase, laptop case or backpack. Southwest gives examples but publishes no dimensions for it. A pet carrier counts as either the carry-on or the personal item.
• Checked bags: standard limit of 62 inches (length + width + height, wheels and handles included) and up to 50 pounds per bag. Bags over these limits attract extra charges.
• Some countries are subject to baggage embargoes that restrict oversized, overweight and extra checked bags, and partner itineraries may follow the partner airline's rules.

Bags too large for the cabin, or a second carry-on or personal item, must be checked at the ticket counter before the gate. Source: Southwest Help Center, "Carryon and Personal Item Policy" and "Checked Bag Policy", read on 24 October 2026.

Source: airline baggage page, read 2026-10-24.

Sun Country's Bags and Optional Services page gives the following limits. Sizes and weights only; bag options other than the under-seat item are charged for.

• Under-seat item (included with every reservation): up to 17 x 13 x 9 in, such as a purse or backpack, which must fit under the seat in front.
• Overhead bag (paid option): up to 24 x 16 x 11 in and 35 lb, and must fit the sizer box. Only travellers who have bought this option may use the overhead bins.
• Checked bag (paid option): up to 62 linear inches (length + width + depth) and 50 lb. Heavier and larger bags cost extra.
• Maximum accepted: 80 linear inches or 100 lb. Bags of 70 lb or more are not accepted on flights to or from Canada, Jamaica and Puerto Rico.
• Four or more checked bags must be arranged by phone or at airport check-in.
• Mobility devices and needed medical equipment do not count as extra overhead bags.

Source: Sun Country Airlines, "Bags and Optional Services", read on 24 October 2026.

Source: airline baggage page, read 2026-10-24.