Best Personal Item Bags in 2026: Underseat Bags for Every Airline
Top personal item bags sized for Spirit, Delta, United, and more. Underseat totes, backpacks, and crossbody bags that fit every airline's limits.
Every airline lets you bring one personal item on board for free — the bag that goes under the seat in front of you. Done right, this saves you the cost of a checked bag or carry-on fee and means your essentials are always within reach. Done wrong, and a bag that's 2 cm too deep gets gate-checked at a premium.
This guide covers the best personal item bags across every size requirement, from Spirit's tight 45×35×20 cm to the more generous 43×33×20 cm allowed on most US majors.
Personal item size limits by airline
| Airline | Personal item limit | Notes |
|---|---|---|
| Spirit | 45×35×20 cm | Strictest enforcement in the US |
| Frontier | 45×35×20 cm | Same as Spirit |
| Delta | 43×33×20 cm | Rarely enforced at gate |
| United | 43×35×22 cm | Variable enforcement |
| American | 43×33×20 cm | Rarely enforced at gate |
| Southwest | 43×33×20 cm | Flexible enforcement |
| easyJet | 45×36×20 cm | Under-seat only |
| Ryanair (standard) | 40×20×25 cm | Strictly enforced — see our Ryanair guide |
Use the CarrySizer fit checker to verify your bag against your specific airline before you fly.
Our top picks
1. Tortuga Setout Laptop Backpack 20L — Best all-round personal item
Dimensions: 43×33×18 cm | Weight: 0.9 kg | Capacity: 20L
The Tortuga Setout 20L was designed specifically to be a personal item — the dimensions are engineered to fit under most airline seats with room to spare. It has a padded laptop sleeve up to 15 inches, a front organisation panel with card slots and pen loops, and a side water bottle pocket. The clamshell opening means you can get to your things without unpacking half the bag at your feet.
Best for: Travellers who want a proper backpack that functions as a personal item on US and European full-service carriers.
Pros:
- Designed from the ground up as a personal item — dimensions are deliberate, not approximate
- Clamshell opening provides easy access without removing the bag from under the seat
Cons:
- 18 cm depth means it will not pass Spirit's 20 cm depth limit if fully packed (the bag bulges)
- No external compression — if you overpack, it won't fit
2. Dagne Dover Large Lanae Tote — Best personal item tote
Dimensions: 43×30×15 cm | Weight: 0.8 kg | Capacity: 28L
If you prefer a tote to a backpack, the Dagne Dover Lanae is the benchmark. It has a structured base that keeps it upright on the floor, an interior laptop sleeve, and multiple zippered interior pockets. At 15 cm depth it slides easily under even tight seats. The neoprene exterior wipes clean and the tote look is appropriate for business and leisure travel alike.
Best for: Travellers who want a tote-style personal item that still has proper organisation and laptop protection.
Pros:
- Structured base stays upright under the seat — no collapsing into the footwell
- Neoprene wipes clean — practical for any journey
Cons:
- Tote handles only — no backpack straps for long walks through the airport
- Open top compartment means items can shift or fall when picking up the bag
3. Cabin Max Cambridge 16L — Best for Spirit and Frontier
Dimensions: 45×35×20 cm | Weight: 0.5 kg | Capacity: 16L
Spirit and Frontier have the most restrictive personal item policies in the US — and the most aggressive enforcement. The Cabin Max Cambridge is sized to exactly 45×35×20 cm with a semi-rigid structure so it doesn't bulge. At 16 litres capacity it's genuinely small, but that's the price of getting through Spirit's sizer every time.
Best for: Spirit and Frontier passengers who want to avoid personal item fees on budget carriers.
Pros:
- Precisely dimensioned for Spirit's 45×35×20 cm limit
- Semi-rigid structure prevents the bag bulging past the gauge
Cons:
- 16L is very limited — you'll need to pack extremely light or buy a bag upgrade
- No dedicated laptop compartment
4. Aer City Pack Pro — Best for work travellers
Dimensions: 43×30×16 cm | Weight: 1.2 kg | Capacity: 24L
The Aer City Pack Pro is a daily commuter bag that doubles as a personal item. The dedicated laptop compartment fits up to a 16-inch laptop, there's a front tech organiser panel for cables and accessories, and a side water bottle pocket. The slim 16 cm depth means it fits under seats on virtually any carrier worldwide.
Best for: Business travellers who want a personal item that works as a daily work bag.
Pros:
- Professional aesthetic appropriate for offices and business travel
- Dedicated 16-inch laptop compartment with padding
Cons:
- 1.2 kg is heavier than simpler alternatives — counts toward weight limits
- Premium price for a bag this size
What to look for in a personal item bag
Depth is the critical dimension. Most airline personal item gauges fail people on depth (front-to-back measurement), not width or height. If a bag has zippered pockets on the front, that pocket depth adds to the total. Measure your packed bag with pockets loaded.
Structure matters at the gate. A soft tote can look within limits when empty but bulge several centimetres when loaded. Semi-rigid or structured bags give you more predictable dimensions.
Under-seat space varies by aircraft. A Boeing 737 under-seat space (roughly 43×33×20 cm) is different from an A320, which is slightly larger. Middle seats often have less underseat space due to floor electronics boxes.
Laptop protection in a personal item. If you carry a laptop, look for a padded sleeve that suspends the laptop away from the bottom of the bag. Hard floors are common when bags are shoved under seats.
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