Key takeaways
- 2 to 3 tops and 1 spare pair of trousers, rolled
- Underwear and socks for each night
- A quart-size liquids bag and basic toiletries
- A 13 to 14 inch laptop and chargers
The best underseat carry-on bag for most travelers is the Travelpro Maxlite 5 Rolling Underseat Carry-On, a light two-wheel softside bag with a laptop sleeve and a lifetime warranty; travelers who want four spinner wheels or a hard shell should look at the Samsonite Winfield 3 DLX Underseat Spinner, and the American Tourister Zoom Turbo Underseat Spinner is the budget pick. The catch is that “underseat” has no single size: personal-item limits range from 40 x 20 x 25 cm on Ryanair to 18 x 14 x 8 inches on American, so the right bag depends on the airline you fly most.
Personal Item Limits by Airline
These are the published personal-item dimensions on major carriers, the bag that goes under the seat in front of you for free. Some airlines publish no fixed size and only require the item to fit under the seat.
| Airline | Personal item limit | Notes |
|---|---|---|
| American Airlines | 18 x 14 x 8 in | Most generous of the US majors |
| United Airlines | 17 x 10 x 9 in | Narrow 10 in width; basic economy relies on this bag |
| Delta Air Lines | No fixed size published | Must fit under the seat |
| Southwest Airlines | 16.25 x 13.5 x 8 in | Smaller than many expect |
| JetBlue | 17 x 13 x 8 in | Blue Basic fares limited to this item |
| Alaska Airlines | No fixed size published | Must fit under the seat |
| Spirit Airlines | 18 x 14 x 8 in | Sizers used at the gate |
| Frontier Airlines | 14 x 18 x 8 in | Sizers used at the gate |
| Allegiant Air | 16 x 15 x 7 in | Shallowest depth in the US |
| Ryanair | 40 x 20 x 25 cm (15.7 x 7.9 x 9.8 in) | Very small; enforced |
| easyJet | 45 x 36 x 20 cm (17.7 x 14.2 x 7.9 in) | Must fit under the seat |
| Wizz Air | 40 x 30 x 20 cm (15.7 x 11.8 x 7.9 in) | Enforced at boarding |
A bag that measures about 16 x 13 x 8 inches clears most US carriers and easyJet. If you regularly fly United basic economy or Ryanair, you need something smaller and narrower than most rolling underseaters, usually a soft backpack or tote. Airlines revise these figures from time to time, so read your booking’s baggage page before you fly.
The Shortlist
Travelpro Maxlite 5 Rolling Underseat Carry-On: Best Overall
The Maxlite 5 is the reference rolling underseater. It weighs about 5.5 pounds, has a water-repellent coated polyester shell, side and front pockets, and a padded sleeve for a laptop up to roughly 13 inches. Two inline wheels keep it compact. At around 17.5 x 14.5 x 8.5 inches it is slightly over some strict published limits, but its soft sides squeeze under most seats. It carries Travelpro’s lifetime warranty on functional parts.
Travelpro Platinum Elite Rolling Underseat Carry-On: Best for Business Travelers
The Platinum Elite version adds a more refined build, a USB port for a power bank, and better organization. It costs more and weighs a bit more than the Maxlite but suits travelers who use an underseat bag as their only bag on short business trips.
Samsonite Winfield 3 DLX Underseat Spinner: Best Hardside
For those who want a hard shell, this compact spinner protects fragile items and rolls on four wheels, which is easier in long airport corridors. Spinner wheels take up interior space and do not compress, so measure carefully against strict airlines.
Samsonite Underseater with USB Port: Best Organization
Samsonite’s softside underseater adds a USB pass-through, a padded laptop pocket and multiple front pockets. It is a practical choice for travelers who work during flights and want everything reachable from the seat.
American Tourister Zoom Turbo Underseat Spinner: Best Budget
This four-wheel softside bag is one of the least expensive underseat spinners from a major brand. It lacks the premium fabric and warranty of Travelpro, but it covers occasional trips well.
Approximate Specs
| Bag | Approx. size (in) | Approx. weight | Wheels | Laptop sleeve | Price range |
|---|---|---|---|---|---|
| Travelpro Maxlite 5 Rolling Underseat | 17.5 x 14.5 x 8.5 | 5.5 lb | 2 | Up to about 13″ | $90 to $140 |
| Travelpro Platinum Elite Rolling Underseat | about 16 x 13 x 8.5 | about 6.5 lb | 2 | Up to about 15″ | $180 to $260 |
| Samsonite Winfield 3 DLX Underseat Spinner | about 15 x 13 x 7.5 | about 5.5 lb | 4 | No dedicated sleeve | $90 to $140 |
| Samsonite Underseater with USB Port | about 16 x 13 x 8 | about 5 lb | 2 | Yes | $100 to $160 |
| American Tourister Zoom Turbo Underseat Spinner | about 16 x 13 x 8 | about 5 lb | 4 | Tablet pocket | $40 to $80 |
Which Bag for Which Flyer
| Your situation | Recommended |
|---|---|
| Avoiding carry-on fees on Spirit or Frontier | Travelpro Maxlite 5 (soft sides squeeze into the sizer) |
| United basic economy (10 in width limit) | A soft backpack or tote; most rollers are too wide |
| Weekly business trips, one-night stays | Travelpro Platinum Elite Rolling Underseat |
| Carrying a camera or fragile gifts | Samsonite Winfield 3 DLX Underseat Spinner |
| Working on the plane | Samsonite Underseater with USB Port |
| Two trips a year | American Tourister Zoom Turbo |
What Fits in an Underseat Bag
Most rolling underseat bags hold roughly 18 to 25 liters once wheels and handle housings are accounted for. For a two to three night trip, that typically means:
- 2 to 3 tops and 1 spare pair of trousers, rolled
- Underwear and socks for each night
- A quart-size liquids bag and basic toiletries
- A 13 to 14 inch laptop and chargers
Wear your bulkiest shoes and jacket. Packing cubes help, but a single medium cube is usually all that fits.
Ownership Notes
- Wheel housings take up space. Two-wheel designs give more usable volume than spinners of the same exterior size.
- The handle is the weak point. Short telescoping handles on underseat bags see heavy strain; avoid lifting the bag by the extended handle.
- Measure with the bag full. Softside bags bulge 1 to 2 inches when packed, which can fail a sizer that the empty bag passes.
- Clean coated fabric gently. A damp cloth and mild soap; avoid harsh cleaners that strip water repellency.
Bottom Line
Start from your airline’s personal-item limit, then choose the bag. For most US travelers, the Travelpro Maxlite 5 Rolling Underseat Carry-On is the most practical all-rounder. Choose the Samsonite Winfield 3 DLX for hard-shell protection, the Platinum Elite for business features, and the American Tourister Zoom Turbo if you travel only occasionally. On ultra-strict European low-cost carriers, a soft backpack beats any rolling bag.
