# Best travel backpack according to Reddit (2026)

> r/onebag's carry-on backpack picks: Osprey Farpoint and Fairview 40, Peak Design Travel Backpack, Aer Travel Pack, Tom Bihn Aeronaut and Cotopaxi Allpa.

Updated 2026-09-30. Based on r/onebag, r/travel, r/HerOneBag. Source: https://threadlens.co.uk/guides/best-travel-backpack

r/onebag exists to answer one question: which single bag lets you travel with carry-on only? The subreddit has tested almost everything, and a small set of bags keeps coming out on top for different kinds of traveller.

This guide summarises that consensus. Scores reflect how consistently each bag is recommended. Always check your airline's cabin size limits, which vary more than the bags do.

## At a glance

1. **Osprey Farpoint 40 / Fairview 40**: Comfortable harness with a real hip belt
2. **Peak Design Travel Backpack 45L**: Expands from 30 to 45 litres
3. **Aer Travel Pack**: Clean, professional look for work trips
4. **Tom Bihn Aeronaut 45**: Maximum carry-on volume
5. **Cotopaxi Allpa 35L**: Tough, brightly coloured design

## Reddit's top 5

### 1. Osprey Farpoint 40 / Fairview 40 (4.5/5)

- Pro: Comfortable harness with a real hip belt
- Pro: Clamshell opening packs like a suitcase
- Pro: Lifetime All Mighty Guarantee
- Con: Looks like a hiking pack
- Con: Few internal organisation pockets
- Con: Can exceed strict budget-airline limits when full

### 2. Peak Design Travel Backpack 45L (4.3/5)

- Pro: Expands from 30 to 45 litres
- Pro: Excellent build and access
- Pro: Works with packing cubes and camera cubes
- Con: Heavy for its size
- Con: Expensive once you add cubes
- Con: Hip belt is minimal

### 3. Aer Travel Pack (4.3/5)

- Pro: Clean, professional look for work trips
- Pro: Great laptop and tech organisation
- Pro: Durable Cordura fabric
- Con: Heavier than it looks
- Con: Stiff structure limits overpacking
- Con: Premium price

### 4. Tom Bihn Aeronaut 45 (4.2/5)

- Pro: Maximum carry-on volume
- Pro: Made in the USA, lasts decades
- Pro: Converts between backpack, shoulder and hand carry
- Con: Backpack straps are an add-on and less comfortable
- Con: Too large for strict European limits
- Con: Expensive to ship to the UK

### 5. Cotopaxi Allpa 35L (4.1/5)

- Pro: Tough, brightly coloured design
- Pro: Suitcase-style mesh compartments
- Pro: Fits most cabin limits
- Con: Heavy for 35 litres
- Con: Harness less comfortable than Osprey
- Con: Limited laptop protection

## What Reddit says

The Osprey Farpoint 40 (and the women's-fit Fairview 40) is r/onebag's most common first recommendation because it is comfortable to carry for hours, opens fully like a suitcase and is covered by Osprey's lifetime guarantee. The usual complaint is that it looks like hiking gear.

For people who want a bag that looks at home in an office or a hotel lobby, the Aer Travel Pack and Peak Design Travel Backpack come up most. Both have better organisation than the Osprey, and both are heavier. Peak Design's expanding design is its big selling point.

The Tom Bihn Aeronaut 45 is the maximum-volume answer and a buy-once bag, but it is at the upper edge of US carry-on limits and often too big for European budget airlines. The Cotopaxi Allpa is a durable middle ground with suitcase-like compartments.

## How to choose

Start with the strictest airline you fly. For European budget carriers, 35 to 40 litres is the practical limit; US carriers usually allow up to 45 litres. Then decide between comfort (Osprey, with a proper hip belt) and looks and organisation (Aer, Peak Design).

r/onebag's other rule: the bag matters less than packing light. Packing cubes and a strict packing list make any of these bags work.

## Frequently asked

### Is 40 litres carry-on size?

For most full-service airlines, yes. Budget airlines often have smaller free cabin allowances, so check the exact dimensions before you fly, especially in Europe.

### Osprey Farpoint or Fairview?

They are the same bag with different harness shapes. The Fairview is designed for narrower shoulders and shorter torsos; pick whichever fits your body, not your gender.

### Do I need packing cubes?

Most of r/onebag says yes. Cubes compress clothes and keep a clamshell bag organised, and they make moving between bags easy.

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Scores are ThreadLens's reading of how consistently each product is recommended in Reddit discussions, not lab tests. ThreadLens is not affiliated with Reddit, Inc. Methodology: https://threadlens.co.uk/about