Sun Country Personal Item Size (2026)

Sun Country’s free personal item (“Underseat item”) is 17 × 13 × 9 inches (height, width, depth; about 43 × 33 × 23 cm), must fit under the seat, and is free: one per traveler on all reservations. A larger bag is treated as overhead (a paid add-on unless Military free overhead or a current Bundle Deal includes it). Underseat fit is enforced, so measure the packed bag before you fly; soft expandable bags that push past 17×13×9 will not count as the free underseat item.

This page follows Sun Country’s bags and optional services page and the Stories first Sun Country flight guide (the base fare includes only the free personal item). Size limits on this page are fixed rules; prices for an oversized underseat bag and for an overhead bag vary by flight, so check baggage fees and Explore Bag Prices before you book.

Compared with Avelo personal item (also 17 × 13 × 9), Sun Country matches that free underseat box. Breeze publishes 17 × 13 × 8, one inch shallower than Sun Country. All three are budget airlines on the base fare: personal item free, overhead bag usually paid.

• Personal (underseat): always free (one per traveler) within 17 × 13 × 9.
• Full overhead bag: paid add-on on the base fare (Military: 1 overhead bag free with ID); see carry-on size and baggage fees.
• Checked bags: paid, price varies, unless Military (2 bags up to 100 lb) or card or bundle benefits apply.
• Mobility and medical devices: free per Sun Country’s official page; not counted as overhead.
• Seats and Bundle Deals are separate products; check what a bundle includes when you book before counting on a bag.

1. Soft bags expand. A backpack that fits empty can fail 17 × 13 × 9 when packed, and underseat fit is judged on the packed bag.
2. An oversized personal item is charged the overhead fee, which rises from booking to counter to gate (the gate adds a $10 handling fee); it is not quietly allowed.
3. Sun Country’s generous overhead size (24×16×11) is not the same as the free underseat bag: base fare flyers only get the smaller bag free.
4. Sun Country’s personal item size matches Avelo’s (17×13×9); Breeze is 17×13×8, one inch shallower.
5. Weight limit for underseat is not published separately.
6. Bundle Deal names and which bags they include: check when you book.

• Pack only a true underseat bag on the base fare.
• Measure the packed bag (not empty marketing size) to 17 × 13 × 9.
• If you need overhead space, buy it early online or check current Bundle Deals when you book.
• Don’t wait until the gate (+$10 handling on top of the airport bag fee).

Shop for under-seat backpacks and slim totes marketed at or under 17 × 13 × 9 inches, then tape-measure the packed bag. Look for bags that fit Sun Country’s underseat personal item size.

What is Sun Country’s free personal item size?
17 × 13 × 9 inches, under the seat, free. One per traveler on all reservations. Soft bags must fit that box when packed.

Is a personal item free on Sun Country?
Yes, one free underseat item per traveler on all reservations. Base fare does not include a free full-size overhead bag.

What if my personal item doesn’t fit under the seat?
It can be treated as overhead and charged the overhead fee (higher at the gate, with an extra $10 Gate Handling Fee). Measure your bag ahead of time and see baggage fees.

Does Sun Country allow a backpack as a personal item?
Yes if it fits 17 × 13 × 9 under the seat when packed (purse, backpack, duffel listed as examples if they fit).

What’s the difference between Sun Country personal item and carry-on?
Personal (underseat): 17 × 13 × 9, free, under seat. Overhead: 24 × 16 × 11, 35 lb, paid on the base fare (Military: 1 free).

How does Sun Country personal item compare to Avelo or Breeze?
Sun Country and Avelo both publish 17 × 13 × 9; Breeze is 17 × 13 × 8. All three are budget airlines: the personal item is free and an overhead bag is usually paid on the base fare. See also Frontier and Allegiant.

• Sun Country carry-on size
• Sun Country baggage fees
• Avelo personal item size
• Breeze personal item size
• Frontier personal item size
• Allegiant personal item size

Confirm sizes and fees on suncountry.com before travel. BagRule is not affiliated with Sun Country Airlines.