Patagonia Atom Tote Pack 20L vs. Portland Gear Cascade Backpack Standard

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

Patagonia Atom Tote Pack 20L

Capacity20 L
Weight0.6 kg
Dimensions41×30×13 cm
Airline fit95%
Price$90

Feature by feature

Patagonia Atom Tote Pack 20LFeaturePortland Gear Cascade Backpack Standard
Storage
N Compression N
None Expanded Capacity None
0 Opening 0
front Passport side
N Passthrough Y
Carry
Y Backpack Y
N Hip Belt N
removable Sternum Strap Y
Inside
13in Laptop 15in
2 Main Compartments 2
Y Organizer Y
Outside
× Hard Shell ×
N Rain-fly N
2, side Water Bottle Holder 2, side
Y Water Resistant Y
Material
7.3-oz 400-denier recycled Polyester with DWR Finish100% polyester with TPU matte coating

Portland Gear Cascade Backpack Standard

Front facing view of the Portland Gear Cascade Backpack Standard
Capacity21 L
Weight1.1 kg
Dimensions41×28×22 cm
Airline fit75%
Price$110

Key differences between the Patagonia Atom Tote Pack 20L and Portland Gear Cascade Backpack Standard

Both have: backpack straps, built-in organizer, water bottle pockets, water resistant.

Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 141 accept both. 39 accept only the Patagonia Atom Tote Pack 20L, and 1 accept only the Portland Gear Cascade Backpack Standard.

Only the Patagonia Atom Tote Pack 20L fits

Air Baltic, Air China, Air Malta, Air Niugini, Air Serbia, Air Seychelles, Air Tahiti, American Eagle, Asiana Airlines, ATA Airlines, Belavia, Blue Air, Bulgaria Air, China Eastern, easyJet, Emirates Airlines, Enter Air, flybe, Icelandair, InselAir, Juneyao Airlines, Liat Airlines, Luxair, Meridiana Fly, Nordwind Airlines, Royal Brunei Airlines, Ryanair, S7, Shandong Airlines, Shenzhen Airlines, Sun Express, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), TUI, Ukraine International, VIM Airlines (Closed), Volotea, Xiamen.

Only the Portland Gear Cascade Backpack Standard fits

Great Lakes Airlines.

Patagonia Atom Tote Pack 20L vs. Portland Gear Cascade Backpack Standard: which should you pack?

The Portland Gear Cascade Backpack Standard carries 1L more than the Patagonia Atom Tote Pack 20L (20L vs. 21L), while the Patagonia Atom Tote Pack 20L is the lighter pack at 0.6kg (vs. 1.1kg). For carry-on flexibility, the Patagonia Atom Tote Pack 20L fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Portland Gear Cascade Backpack Standard; if you want to travel lighter, the Patagonia Atom Tote Pack 20L is the better call.