Best Under-Seat Bags for Flying in 2026

What Makes a Good Under-Seat Bag?

An under-seat bag needs to be slim enough to slide under a seat with 9-10 inches of clearance, organized enough to be useful during the flight, and large enough to count as your personal item allowance. The best under-seat bags are:

• Semi-structured so they hold their shape but compress when needed
• Under 18x14x8 inches for broad airline compatibility
• Have a flat bottom so they don't roll around under the seat
• Equipped with quick-access pockets for in-flight essentials

Best Overall: Away The Small Everywhere Bag

Away's small everyday bag is purpose-built for under-seat use on planes. It's structured, fits perfectly under most airplane seats, and has thoughtfully designed pockets for your laptop, tech accessories, and personal items. While it's premium-priced, the quality justifies the cost for frequent flyers.

Best Budget: Gonex Packable Duffle

The Gonex Packable Duffle (check price on Amazon) is an affordable and flexible under-seat option. It packs flat when empty, expands to hold a weekend's worth of gear, and its soft sides compress under even tighter seats. Great for budget travelers flying Spirit or Frontier who need to stay within the free personal item allowance.

Best for Work: Briggs & Riley Baseline Brief

For business travelers, the Briggs & Riley Baseline Brief is a structured briefcase/backpack that fits under airplane seats and doubles as a carry-on personal item. It has a dedicated laptop section, tablet pocket, and organization panel. Premium quality that lasts years.

Best Backpack Style: Osprey Daylite 13L

The Osprey Daylite 13L (check price on Amazon) is the top backpack choice for under-seat use. At 13 liters, it slides under airplane seats easily and still holds a 15-inch laptop, tablet, change of clothes, and personal essentials. The padded shoulder straps make carrying through the airport comfortable.

Seats to Avoid If You Have an Under-Seat Bag

Not all airplane seats have equal under-seat storage. Watch out for:

• Bulkhead seats: The row directly behind a wall — no seat in front of you means no under-seat storage
• Exit rows: Sometimes have reduced under-seat space due to emergency equipment
• Middle seat near the galley: Limited floor space in some configurations

Always check SeatGuru.com for your specific flight to see which seats have the best under-seat storage.

Packing Your Under-Seat Bag Efficiently

Keep your under-seat bag loaded with in-flight essentials: headphones, a good book or tablet, snacks, a water bottle, lip balm, and any medications. Your overhead carry-on can hold items you won't need until you land. This separation means you never have to get up mid-flight to dig through overhead bins.