---
url: "https://onebag.travel/compare/3la3efqguy/stm-prime/v7eisuxlc1/lowe-alpine-at-lightflite-carry-on/"
title: "STM Prime vs Lowe Alpine AT Lightflite Carry-on"
description: "STM Prime vs Lowe Alpine AT Lightflite Carry-on: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/3la3efqguy/stm-prime/v7eisuxlc1/lowe-alpine-at-lightflite-carry-on/"
---
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2.  [Carry-On Travel Backpacks](https://onebag.travel/carryons/)
3.  STM Prime vs. Lowe Alpine AT Lightflite Carry-on

# STM Prime vs. Lowe Alpine AT Lightflite Carry-on

Two carry-on travel backpacks, compared spec for spec.

## [STM Prime](https://onebag.travel/carryon/3la3efqguy/stm-prime/)

![Front facing view of the STM Prime](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1601123578/carryons/stmprime_yfxzkc.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>15 L</td></tr><tr><td>Weight</td><td>0.7 kg</td></tr><tr><td>Dimensions</td><td>42×26×13 cm</td></tr><tr><td>Airline fit</td><td>96%</td></tr><tr><td>Price</td><td>$80</td></tr></tbody></table>

## Feature by feature

| STM Prime | Feature | Lowe Alpine AT Lightflite Carry-on |
| --- | --- | --- |
| Storage |
| N | Compression |  |
| None | Expanded Capacity | None |
| 0 | Opening | 0 |
| top | Passport | top |
| N | Passthrough | N |
| Carry |
| Y | Backpack | hideable |
| N | Hip Belt | N |
| Y | Sternum Strap | N |
| Inside |
| 13in | Laptop |  |
| 2 | Main Compartments | 2 |
| N | Organizer | N |
| Outside |
| × | Hard Shell | × |
| N | Rain-fly | N |
| 2, side | Water Bottle Holder |  |
| Y | Water Resistant | Y |

<table class="cmp-material"><tbody><tr><td colspan="2">Material</td></tr><tr><td>Polyester</td><td></td></tr></tbody></table>

## [Lowe Alpine AT Lightflite Carry-on](https://onebag.travel/carryon/v7eisuxlc1/lowe-alpine-at-lightflite-carry-on/)

![Front facing view of the Lowe Alpine AT Lightflite Carry-on](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1601601297/carryons/lowealpine_ofignc.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>40 L</td></tr><tr><td>Weight</td><td>0.8 kg</td></tr><tr><td>Dimensions</td><td>51×36×21 cm</td></tr><tr><td>Airline fit</td><td>66%</td></tr><tr><td>Price</td><td>$110</td></tr></tbody></table>

## Key differences between the STM Prime and Lowe Alpine AT Lightflite Carry-on

-   **Backpack straps:** Yes on the STM Prime; Hideable on the Lowe Alpine AT Lightflite Carry-on.
-   **Sternum strap:** Yes on the STM Prime; No on the Lowe Alpine AT Lightflite Carry-on.

Both have: passport pocket, water resistant.

## Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 124 accept both. 57 accept only the STM Prime, and 0 accept only the Lowe Alpine AT Lightflite Carry-on.

### Only the STM Prime fits

Aerolineas Argentinas, Air Baltic, Air China, Air France, Air India, Air Malta, Air Mauritius, Air Niugini, Air Serbia, Air Seychelles, Air Tahiti, American Eagle, Asiana Airlines, ATA Airlines, Belavia, Blue Air, Boliviana de Aviacion, Bulgaria Air, Cayman Airways, China Eastern, easyJet, Emirates Airlines, Enter Air, Etihad Airways, flybe, Great Lakes Airlines, Gulf Air, Icelandair, Indigo, InselAir, Jet Airways, Juneyao Airlines, Kenya Airways, KLM, LATAM , Luxair, Meridiana Fly, Nordwind Airlines, Qatar Airways, Ravn Alaska, Regional Express, Royal Brunei Airlines, Ryanair, S7, Shandong Airlines, Shenzhen Airlines, Sky Airlines, Sun Express, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), TUI, Ukraine International, VIM Airlines (Closed), Virgin Australia, Volotea, Xiamen.

## STM Prime vs. Lowe Alpine AT Lightflite Carry-on: which should you pack?

The **Lowe Alpine AT Lightflite Carry-on** carries 25L more than the **STM Prime** (15L vs. 40L), while the **STM Prime** is the lighter pack at 0.7kg (vs. 0.8kg). For carry-on flexibility, the **STM Prime** fits 96% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Lowe Alpine AT Lightflite Carry-on; if you want to travel lighter, the STM Prime is the better call.