Best Carry-On Backpack (2026): 6 Packs Checked Against Real Airline Limits
The Minaal Carry-on 3.0 is the best carry-on backpack for travelers who fly strict airlines, because its published fully packed size of 21.6 × 13.7 × 7.87 in (55 × 35 × 20 cm) matches the 55 × 40 × 20 cm cabin bag limit that Ryanair and Vueling list, and it weighs 3.12 lbs (1.41 kg). It costs $349, so the Cotopaxi Allpa 35L at $157.50 is the pick if you can accept a deeper bag.
Disclosure: NewCarryOn may earn a commission if you buy through links on this page. Every dimension and weight below comes from the manufacturer's product page, checked on October 12, 2026. Prices change often.
Quick verdict
| Pack | Best for | Volume | Size (H × W × D) | Weight | Price at last check |
|---|---|---|---|---|---|
| Minaal Carry-on 3.0 | Strict airlines | 35 L | 21.6 × 13.7 × 7.87 in | 3.12 lbs (1.41 kg) | $349 |
| Cotopaxi Allpa 35L | Value and organization | 35 L | 22 × 12 × 10 in | 2.94 lbs (1.33 kg) | $157.50 |
| Aer Travel Pack 4 35L | Everyday and travel crossover | 35 L | 21.5 × 13.5 × 9 in | 3.9 lbs (1.77 kg) | $259 |
| Tortuga Pro Backpack 40L | Maximum capacity | 40 L | 22 × 14 × 8 in | 4.4 lbs (2 kg) | $350 |
| Tom Bihn Techonaut 30 | Three carry modes | 30 L | 12.6 × 19.7 × 8 in | 2.2 lbs (1 kg) | $415 |
| Topo Designs Global Travel Bag 30L | Smallest footprint | 30 L (35 L expanded) | 20 × 12.5 × 7 in | Not published | $219 |
How we checked each pack against airline limits
Two numbers decide whether a backpack gets into the cabin: the US limit of 22 × 14 × 9 in (55.9 × 35.6 × 22.9 cm) and the tighter 55 × 40 × 20 cm bag that Ryanair and Vueling list in the NewCarryOn airline data. Depth is where backpacks fail, because a full 35 L pack bulges.
Here is how each pack scores against both limits, using the manufacturer's own stated size.
| Pack | Fits 22 × 14 × 9 in (US limit) | Fits 55 × 40 × 20 cm (Ryanair, Vueling bag limit) |
|---|---|---|
| Minaal Carry-on 3.0 | Yes | Yes, depth at the 20 cm limit |
| Tortuga Pro Backpack 40L | Yes | Yes, depth at the 20 cm limit |
| Topo Designs Global Travel Bag 30L | Yes | Yes |
| Tom Bihn Techonaut 30 | Yes | No, 0.5 cm over at 20.5 cm deep |
| Aer Travel Pack 4 35L | Yes, depth at the 9 in limit | No, 23 cm deep |
| Cotopaxi Allpa 35L | No, 10 in deep | No, 25.4 cm deep |
Read the airline policy pages for Ryanair and Vueling before you rely on the 20 cm figure, because both change their rules. A soft pack can compress, which no hard suitcase can, but a pack that is full to its stated volume will not.
Minaal Carry-on 3.0: best carry-on backpack for strict airlines
The Carry-on 3.0 is the pick because it states a fully packed size of 55 × 35 × 20 cm and weighs 1.3 lbs (0.6 kg) less than Tortuga, the only other pack here that states a 20 cm depth. Minaal lists 35 L of capacity and a weight of 3.12 lbs (1.41 kg).
Photo: Minaal
The pack protects up to two 16 in laptops or devices in a DeviceNest sleeve, has a seam-sealed rain cover, and is covered by a lifetime warranty. Minaal lists a 90-day return window for US orders.
The negative is price. At $349 it is the third most expensive pack here, and you are paying for the stated depth, not the lightest bag: Cotopaxi's Allpa 35L weighs 0.18 lbs (0.08 kg) less.
Cotopaxi Allpa 35L: best value
The Allpa 35L is the cheapest pack here with a lifetime warranty, at $157.50. Cotopaxi lists it at 22 × 12 × 10 in and 2 lbs 15 oz (1.33 kg), with a 15 in laptop sleeve and a luggage pass-through strap that slides over a roller bag handle.
Photo: Cotopaxi
The main compartment opens suitcase-style, and the shell is made from 100% recycled fabric with a water-resistant TPU coating. Pack Hacker's travel backpack guide names the Allpa 35L its pick for organization, and notes the hip belt does not come off.
The negative is depth. At 10 in (25.4 cm), it is 1 in over the US 9 in limit and 5.4 cm over the 20 cm bag limit, so it only works on airlines that publish a generous cabin bag. The carry-on size by airline chart lists which ones.
Aer Travel Pack 4 35L: best crossover for daily use
Aer's Travel Pack 4 35L looks like a commuter bag and holds up like a travel bag. Aer lists 21.5 × 13.5 × 9 in (54.5 × 34 × 23 cm), 35 L, and 3.9 lbs (1.77 kg), with a padded laptop pocket that fits up to 16 in.
Photo: Aer
The shell is ballistic nylon with a ripstop interior and YKK zippers, and Pack Hacker's guide names it the best-value pick. The price is $259 for the 35L, with a 28L version at $239 on the same page.
The negative is depth. At 9 in (23 cm) it sits exactly on the US limit and 3 cm over the 20 cm bag limit, and Pack Hacker notes the hip belt is sold separately.
Tortuga Pro Backpack 40L: best for maximum capacity
Tortuga's Pro Backpack 40L is the largest pack here and the one built most around a padded hip belt. Tortuga lists 22 × 14 × 8 in (55 × 35 × 20 cm), 40 L, and 4.4 lbs (2 kg).
Photo: Tortuga
The padded hip belt fits a 23 to 68 in waist and, per Tortuga, moves up to 80% of the load onto your hips. The suspended electronics compartment fits a 16 in laptop and a 12.9 in tablet. Price is $350.
The negative is weight. At 4.4 lbs (2 kg) it weighs 1.3 lbs (0.6 kg) more than the Minaal, and a full 40 L pack is the one most likely to be questioned at a gate. See the lightest carry-ons under 7 lbs if weight limits are your constraint.
Tom Bihn Techonaut 30: best for three carry modes
The Techonaut 30 converts between backpack, shoulder bag and duffel carry. Tom Bihn lists 19.7 in wide, 12.6 in tall and 8 in deep (50 × 32 × 20.5 cm), with a volume of 30 L and a weight of 2 lbs 3.3 oz (1,000 g) in the 420 Spectron fabric.
Photo: Tom Bihn
Tom Bihn makes it in Seattle, and it includes a suspended laptop compartment for a 16 in laptop and a luggage pass-through. The price is $415, and heavier fabrics add weight: the 1050d ballistic version weighs 2 lbs 11.6 oz (1,235 g).
The negative is the price and the footprint. It is the most expensive pack here, and Tom Bihn notes that depth varies with how full the bag is packed, so 8 in is a minimum, not a guarantee.
Topo Designs Global Travel Bag 30L: best for the smallest footprint
The Global Travel Bag 30L has the smallest footprint here and clears every limit we checked. Topo lists 20 in tall, 12.5 in wide and 7 in deep (50.8 × 31.8 × 17.8 cm), and a volume of 30 L that can expand to 35 L.
Photo: Topo Designs
The price is $219. The negative is that the product page lists no weight, so we cannot state one here. Topo Designs backs its gear with a repair program, and the bag is built from recycled nylon.
A popular pick we left out
The Osprey Farpoint 40 appears in most roundups, and Pack Hacker names it its budget pick. Osprey's site did not load for our spec check on October 12, 2026, so we left it out rather than repeat dimensions and prices we could not confirm.
How to choose a carry-on backpack
- Measure against your strictest airline. Take the depth first. A 35 L pack at 9 in deep fits US limits and fails 20 cm limits.
- Choose a volume. Cotopaxi lists 35 L as a 3 to 5 day pack, and Tortuga says its 40 L holds 7 to 10 days of clothing.
- Decide on a hip belt. Tortuga's is the most developed here, fitting 23 to 68 in waists. Cotopaxi's hip belt does not detach, and Aer's is sold separately.
- Check the warranty terms. Minaal and Cotopaxi both state lifetime coverage, but the claims process differs.
- Know when to choose a suitcase instead. For rigid protection, see the best underseat carry-on bags.
Frequently Asked Questions
What is the best carry-on backpack?
The Minaal Carry-on 3.0 is the best carry-on backpack for strict airlines, because its fully packed size is 21.6 × 13.7 × 7.87 in (55 × 35 × 20 cm). The Cotopaxi Allpa 35L is the best value, at $157.50.
What size backpack counts as a carry-on?
United, Delta and American list 22 × 14 × 9 in (55.9 × 35.6 × 22.9 cm). Ryanair and Vueling are tighter, listing 55 × 40 × 20 cm for their cabin bag.
Is a carry-on backpack a personal item?
A 30 to 40 L pack is a carry-on, not a personal item. Wizz Air's free bag is 40 × 30 × 20 cm in the catalog, which is 24 L at most. Read carry-on vs personal item for the full breakdown.
Can a backpack be squashed into a smaller size?
A soft pack compresses, and a hard suitcase does not. A backpack that is full to its rated volume will still bulge past its stated depth, so pack to 80% if your airline measures.
How many liters is a carry-on backpack?
Most carry-on backpacks are 30 to 40 L. The packs here range from 30 L (Tom Bihn and Topo) to 40 L (Tortuga).
Where to go next
Compare a backpack against a wheeled bag in the NewCarryOn luggage catalog, then check your airline on the carry-on size by airline chart.
