--- url: "https://onebag.travel/compare/e5knzdtvc9/fjallraven-rucksack-no-21-medium/vaqpdhhg3f/osprey-transporter-flap-pack/" title: "Fjallraven Rucksack No. 21 Medium vs Osprey Transporter® Flap Pack" description: "Fjallraven Rucksack No. 21 Medium vs Osprey Transporter® Flap Pack: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side." source: "https://onebag.travel/compare/e5knzdtvc9/fjallraven-rucksack-no-21-medium/vaqpdhhg3f/osprey-transporter-flap-pack/" --- 1. [Home](https://onebag.travel/) 2. [Carry-On Travel Backpacks](https://onebag.travel/carryons/) 3. Fjallraven Rucksack No. 21 Medium vs. Osprey Transporter® Flap Pack # Fjallraven Rucksack No. 21 Medium vs. Osprey Transporter® Flap Pack Two carry-on travel backpacks, compared spec for spec. ## [Fjallraven Rucksack No. 21 Medium](https://onebag.travel/carryon/e5knzdtvc9/fjallraven-rucksack-no-21-medium/) by [Fjallraven](https://onebag.travel/carryons/?brands=Fjallraven) ![Front facing view of the Fjallraven Rucksack No. 21 Medium](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1624459069/carryons/Fjallraven_Rucksack_No._21_Medium_jvbbap.webp)
Capacity20 L
Weight0.96 kg
Dimensions44×28×13 cm
Airline fit96%
Price$180
## Feature by feature | Fjallraven Rucksack No. 21 Medium | Feature | Osprey Transporter® Flap Pack | | --- | --- | --- | | Storage | | N | Compression | N | | None | Expanded Capacity | None | | 3 | Opening | 3 | | N | Passport | N | | N | Passthrough | N | | Carry | | Y | Backpack | Y | | N | Hip Belt | removable | | Y | Sternum Strap | Y | | Inside | | 15in | Laptop | 15in | | 1 | Main Compartments | 1 | | N | Organizer | | | Outside | | × | Hard Shell | × | | N | Rain-fly | N | | 2 | Water Bottle Holder | 1 | | Y | Water Resistant | Y |
Material
G-1000® HeavyDuty Eco: 65% polyester, 35% cotton400D Nylon TPU Double Coated
## [Osprey Transporter® Flap Pack](https://onebag.travel/carryon/vaqpdhhg3f/osprey-transporter-flap-pack/) by [Osprey](https://onebag.travel/carryons/?brands=Osprey) ![Front facing view of the Osprey Transporter® Flap Pack](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1631615046/carryons/Osprey_Transporter_Flap_Pack_qe7k2b.webp)
Capacity20 L
Weight0.9 kg
Dimensions46×33×31 cm
Airline fit13%
Price$120
## Key differences between the Fjallraven Rucksack No. 21 Medium and Osprey Transporter® Flap Pack - **Hip belt:** No on the Fjallraven Rucksack No. 21 Medium; Removable on the Osprey Transporter® Flap Pack. - **Water bottle pockets:** 2 on the Fjallraven Rucksack No. 21 Medium; 1 on the Osprey Transporter® Flap Pack. Both have: backpack straps, sternum strap, laptop sleeve, water resistant. ## Which airlines take each bag as a carry-on We checked both bags against the carry-on size limits of 189 airlines. 25 accept both. 156 accept only the Fjallraven Rucksack No. 21 Medium, and 0 accept only the Osprey Transporter® Flap Pack. ### Only the Fjallraven Rucksack No. 21 Medium fits Aegean Airlines, Aer Lingus, Aeroflot, Aerolineas Argentinas, Aeromexico, Air Asia, Air Astana, Air Baltic, Air Canada, Air Caraibes, Air China, Air France, Air India, Air Macau, Air Malta, Air Mauritius, Air Niugini, Air Nostrum, Air Serbia, Air Seychelles, Air Tahiti, Air Wisconsin, AirAsiaX, Alaska Airlines, All Nipon Airways, Allegiant Air, American Airlines, American Eagle, ANA, Asiana Airlines, ATA Airlines, Atlas Global, Austrian, Avianca , Azerbaijan Airlines, Bahamasair, Bangkok Airways, Belavia, Biman Bangladesh, Blue Air, Boliviana de Aviacion, British Airways, Brussels Airlines, Bulgaria Air, Cambodia Angkor Air, Cathay Pacific, Cayman Airways, Cebu Pacific, China Airlines, China Eastern, CommutAir, Conviasa, Copa Airlines, Czech Airlines, Delta Airlines, Dragonair, easyJet, EL AL, Emirates Airlines, Enter Air, Ethiopian Airlines, Etihad Airways, Eurowings, EVA Air, Fiji Airways, Finnair, Flair Air, flybe, Frontier Airlines, Garuda Indonesia, Gol Linhas Aereas, Great Lakes Airlines, Gulf Air, Hawaiian Airlines, Hong Kong Airlines, Iberia, Icelandair, Indigo, InselAir, Interjet, Iran Air, Iran Aseman Air, Island Air, Japan Airlines, Jet Airways, Jet2, jetBlue Airways, Jetstar Airways, Jetstar Asia, Juneyao Airlines, Kenya Airways, KLM, Kulula, Kuwait Air, LATAM , Liat Airlines, LOT Polish, Lufthansa, Luxair, Mahan Air, Malaysia Airlines, Mango, Meridiana Fly, Mesa Airlines, Middle East Airlines, Monarch Airlines, Nordwind Airlines, Norwegian, Oman Air, Onur Air, Pakistan International, Peach, PenAir, Porter Airlines, Qantas Airways, Qatar Airways, Ravn Alaska, Regional Express, Republic Airways, Royal Brunei Airlines, Royal Jordanian, Ryanair, S7, SAS Scandinavian, Scoot, Shandong Airlines, Shenzhen Airlines, Sky Airlines, Skywest, Inc., South African Airways, Southwest Airlines, Spirit Airlines, SriLankan Airlines, Sun Country, Sun Express, Swiss Int'l Air Lines, TAP Air Portugal, TAROM, Thai Airways, Tianjin Airlines (A320 & E190), Tiger Airways, Trans States, Travel Service Airlines, TUI, Turkish Airlines, Ukraine International, United Airlines, Uzbekistan Air, Vietnam Airlines, VIM Airlines (Closed), Virgin Atlantic, Virgin Australia, Volotea, WestJet, WOW Airlines, Xiamen. ## Fjallraven Rucksack No. 21 Medium vs. Osprey Transporter® Flap Pack: which should you pack? The **Fjallraven Rucksack No. 21 Medium** carries the same capacity as the **Osprey Transporter® Flap Pack** (20L vs. 20L), while the **Osprey Transporter® Flap Pack** is the lighter pack at 0.9kg (vs. 0.96kg). For carry-on flexibility, the **Fjallraven Rucksack No. 21 Medium** fits 96% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Fjallraven Rucksack No. 21 Medium; if you want to travel lighter, the Osprey Transporter® Flap Pack is the better call.