Gregory Alpaca 40 vs. Millican Miscellaneous Adventures

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

Gregory Alpaca 40

Capacity40 L
Weight1.2 kg
Dimensions57.9×33.8×28.7 cm
Airline fit1%
Price$140

Feature by feature

Gregory Alpaca 40FeatureMillican Miscellaneous Adventures
Storage
N Compression
None Expanded Capacity None
0 Opening 0
side Passport side
N Passthrough N
Carry
removable Backpack
N Hip Belt N
N Sternum Strap N
Inside
N Laptop 15in
3 Main Compartments 3
N Organizer N
Outside
× Hard Shell ×
N Rain-fly N
N Water Bottle Holder
Y Water Resistant Y
Material
40% Recycled 900D Polyester Ripstop with TPU Weather resistant coating100% recycled polyester made from 40 PET bottlesC6 DWR water repellent treatmentPU1500 waterproof coating

Millican Miscellaneous Adventures

Front facing view of the Millican Miscellaneous Adventures
Capacity18 L
Weight1 kg
Dimensions51×29×13 cm
Airline fit89%
Price$110

Key differences between the Gregory Alpaca 40 and Millican Miscellaneous Adventures

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. 2 accept both. 0 accept only the Gregory Alpaca 40, and 167 accept only the Millican Miscellaneous Adventures.

Only the Millican Miscellaneous Adventures fits

Adria Airways, Aegean Airlines, Aer Lingus, Aeroflot, Aerolineas Argentinas, Aeromexico, Air Asia, Air Astana, Air Baltic, Air Canada, Air Caraibes, Air China, Air Europa, Air France, Air India, Air Koryo, Air Macau, Air Malta, Air Mauritius, Air New Zealand, Air Nostrum, Air Serbia, Air Seychelles, Air Tahiti Nui, Air Wisconsin, AirAsiaX, Alaska Airlines, All Nipon Airways, Allegiant Air, American Airlines, ANA, Asiana Airlines, ATA Airlines, Atlas Global, Austrian, Avianca , Azerbaijan Airlines, Azul Linhas, Bahamasair, Bangkok Airways, Biman Bangladesh, Blue Air, Boliviana de Aviacion, British Airways, Brussels Airlines, Bulgaria Air, Cambodia Angkor Air, Caribbean Airlines, Cathay Pacific, Cayman Airways, Cebu Pacific, China Airlines, China Eastern, China Southern, CommutAir, Conviasa, Copa Airlines, Croatia Air, Cubana de Aviacion, Czech Airlines, Delta Airlines, Dragonair, EL AL, Emirates Airlines, Enter Air, Ethiopian Airlines, Eurowings, EVA Air, Fiji Airways, Finnair, Flair Air, flybe, Frontier Airlines, Garuda Indonesia, Gol Linhas Aereas, Hainan Airlines, 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, Korean Air, 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, Philippine Airlines, Porter Airlines, Qantas Airways, Republic Airways, Royal Air Morocco, Royal Brunei Airlines, Royal Jordanian, Ryanair, S7, SAS Scandinavian, Saudi Arabian Airlines, Scoot, Shandong Airlines, Shenzhen Airlines, Sichuan Airlines, SilkAir, Silver Airways, Singapore Airlines, Sky Airlines, Skywest, Inc., South African Airways, Southwest Airlines, SpiceJet, Spirit Airlines, SriLankan Airlines, Sun Country, Sun Express, Swiss Int'l Air Lines, TAAG Angola, TAM Airlines, TAP Air Portugal, TAROM, Thai Airways, Tianjin Airlines (A320 & E190), Tiger Airways, Trans States, Travel Service Airlines, TUI, Turkish Airlines, Ukraine International, United Airlines, Ural Airlines, Uzbekistan Air, Vietnam Airlines, VIM Airlines (Closed), Virgin Atlantic, Volotea, WestJet, WOW Airlines, Xiamen.

Gregory Alpaca 40 vs. Millican Miscellaneous Adventures: which should you pack?

The Gregory Alpaca 40 carries 22L more than the Millican Miscellaneous Adventures (40L vs. 18L), while the Millican Miscellaneous Adventures is the lighter pack at 1kg (vs. 1.2kg). For carry-on flexibility, the Millican Miscellaneous Adventures fits 89% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Gregory Alpaca 40; if you want to travel lighter, the Millican Miscellaneous Adventures is the better call.