Sun Country Airlines' overhead carry-on can measure 24 x 16 x 11 inches (61 x 41 x 28 cm) and weigh 35 lb (16 kg), and it costs extra; the free under-seat item is 17 x 13 x 9 inches (43 x 33 x 23 cm). Checked bags up to 50 lb (23 kg) are priced per flight, cheapest at booking. Active U.S. military check two bags free.
Sun Country's overhead bag can measure up to 24 x 16 x 11 inches (61 x 41 x 28 cm), wheels and handles included, and weigh up to 35 lb (16 kg). It has to fit the sizer box at the ticket counter or gate. The base fare leaves it out: overhead bins are only for travelers who bought the overhead bag option. Sun Country prices it per flight, so check the bag price tool or your booking for the exact amount.
At 24 x 16 x 11 in, Sun Country's overhead allowance is larger than the 22 x 14 x 9 in most US airlines publish.
Every Sun Country reservation includes 1 under-seat item per traveler at no charge, up to 17 x 13 x 9 inches (43 x 33 x 23 cm). A purse, backpack, duffel or laptop bag counts if it fits under the seat in front of you. Travelers with an infant may add 1 diaper bag on top of it.
Yes, overhead bags carry a 35 lb (16 kg) cap, and agents can check size against the sizer box at the counter or gate. If a prepaid overhead bag does not fit the sizer, it is checked and extra charges may apply. Buying the bag at the gate adds a $10 gate handling fee on top of airport prices. If the bins fill up, qualified overhead bags are tagged and checked at no extra charge.
Only 1 under-seat item comes with the base fare; the overhead bag and every checked bag are paid bag options. Bundle Deals combine seats, bags and trip extras at a discount. Priority check-in and zone 1 boarding cost $5 to $25 per traveler, per direction, and Best seats board in zone 2. Base fare travelers without those extras board in a later zone.
| OPTION | PERSONAL ITEM | CARRY-ON | CHECKED BAG |
|---|---|---|---|
| Base fare | Included | Paid bag option | Paid bag option |
| Bundle Deals | Included | Depends on bundle | Depends on bundle |
Sun Country does not publish a flat bag fee table. Prices vary by flight and are quoted per person, per direction in its Explore Bag Prices tool and at booking. Bags cost least when you book, more when added later through My Trips or online check-in, more again at the ticket counter, and most at the gate, which adds a $10 handling fee. Sun Country Visa cardholders get 50% off the first bag when it is bought online or by phone.
Sun Country ranks bag prices in four steps: booking, after booking, ticket counter, then gate.
Each checked bag can weigh up to 50 lb (23 kg) and measure up to 62 linear inches (157 cm), adding length, width and depth. Heavier or larger bags pay extra, up to a hard ceiling: Sun Country refuses any bag over 100 lb (45 kg) or 80 linear inches (203 cm). On flights to or from Canada, Jamaica and Puerto Rico, bags of 70 lb (32 kg) or more are not accepted.
Overweight charges rise in $25 steps: +$25 for 51 to 60 lb, +$50 for 61 to 70 lb, +$75 for 71 to 80 lb, +$100 for 81 to 90 lb and +$125 for 91 to 99 lb. A bag of 63 linear inches (160 cm) or more costs $100 extra, as does special sporting equipment. These charges apply per bag, each way, and sit on top of the normal bag price.
Active U.S. military members get 2 free checked bags up to 100 lb (45 kg) each plus 1 free overhead bag, and oversize fees are waived on those 2 checked bags. Veterans and travel companions pay standard prices. Sun Country Visa Signature cardholders get 50% off the first bag for themselves and companions on the same itinerary, if it is bought online while logged in or through Reservations.
Yes, small cats and dogs can fly in the cabin as carry-on baggage on select flights within the 48 contiguous United States. An advance reservation costs $75 per direction and a walk-up request $100, both non-refundable, with a limit of 6 pets per aircraft. The carrier goes under the seat in front, roughly 17 x 12.5 x 8.5 inches (43 x 32 x 22 cm), and takes the place of the free under-seat item. Sun Country offers no cargo option for pets.
Sun Country checks car seats and booster seats free at the ticket counter or gate, and they do not count toward your bags. An FAA-approved car seat can be used onboard only if you bought a seat for the child; booster seats are not allowed onboard. Strollers are normally gate checked free. One diaper bag per infant rides free, while portable cribs and pack and plays pay normal bag prices.
As of June 9, 2026, Sun Country describes itself as a wholly owned subsidiary of Allegiant Travel Company, and it keeps selling its own flights through April 13, 2027. Allegiant said both airlines run as separate carriers for now, so you manage bags with the airline you booked. No merged bag policy has been announced.
An Allegiant executive told trade press the Sun Country name will be retired once both carriers fly on one FAA certificate; no official release confirms a date.
No. Every reservation includes only a free under-seat item up to 17 x 13 x 9 in. An overhead carry-on up to 24 x 16 x 11 in and 35 lb is a paid bag option you add at booking or later.
Yes. Sun Country says bags cost least at booking, more after booking, more at the ticket counter and most at the gate, where a $10 gate handling fee is added.
Yes, as a paid carry-on. It fits inside Sun Country's 24 x 16 x 11 in overhead limit with room to spare, but it is too big to count as the free 17 x 13 x 9 in personal item.
No, it gives 50% off instead. Cardholders and companions on the same itinerary pay half price for the first bag when it is bought online while logged in or through Reservations.
Yes. Active U.S. military get 2 free checked bags up to 100 lb each and 1 free overhead bag, with oversize fees waived on those bags. Veterans and companions pay standard prices.
$75 per direction for an advance reservation, or $100 for a walk-up request. Both are non-refundable, and only cats and dogs fly, in the cabin, on select flights in the 48 contiguous states.
Yes. Sun Country is a wholly owned subsidiary of Allegiant Travel Company. The two still operate as separate airlines with their own bookings, check-in and bag rules for now.
Verified October 3, 2026 by BaggageLimits editors. Rules change often; confirm with the airline before you fly.