Aer Travel Pack 4 35L vs. Aer City Pack Pro

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

Aer Travel Pack 4 35L

by Aer
Front facing view of the Aer Travel Pack 4 35L
Capacity35 L
Weight1.8 kg
Dimensions55×34×23 cm
Airline fit68%
Price$260

Feature by feature

Aer Travel Pack 4 35LFeatureAer City Pack Pro
Storage
N Compression N
None Expanded Capacity None
1 Opening 1
top Passport top, side
Y Passthrough Y
Carry
Y Backpack Y
optional Hip Belt N
removable Sternum Strap removable
Inside
16in Laptop 16in
5 Main Compartments 5
Y Organizer Y
Outside
× Hard Shell ×
N Rain-fly N
2, side Water Bottle Holder 1, side
Y Water Resistant Y
Material
1680D CORDURA® ballistic nylon exterior (bluesign® approved)1680D Cordura® ballistic nylon exterior, or xPac

Aer City Pack Pro

by Aer
Front facing view of the Aer City Pack Pro
Capacity24 L
Weight1.2 kg
Dimensions46×31×19 cm
Airline fit94%
Price$210

Key differences between the Aer Travel Pack 4 35L and Aer City Pack Pro

Both have: luggage passthrough, backpack straps, sternum strap, laptop sleeve, built-in organizer, water resistant.

Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 129 accept both. 0 accept only the Aer Travel Pack 4 35L, and 48 accept only the Aer City Pack Pro.

Only the Aer City Pack Pro fits

Air Baltic, Air China, Air Malta, Air Serbia, Air Seychelles, American Eagle, Asiana Airlines, ATA Airlines, Belavia, Blue Air, Bulgaria Air, China Eastern, easyJet, Emirates Airlines, Enter Air, Etihad Airways, flybe, Icelandair, InselAir, Juneyao Airlines, Liat Airlines, Luxair, Meridiana Fly, Nordwind Airlines, Oman Air, Pakistan International, Qatar Airways, Ravn Alaska, Regional Express, Royal Brunei Airlines, Royal Jordanian, Ryanair, S7, Scoot, Shandong Airlines, Shenzhen Airlines, Sun Express, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), Tiger Airways, TUI, Ukraine International, VIM Airlines (Closed), Virgin Australia, Volotea, WestJet, Xiamen.

Aer Travel Pack 4 35L vs. Aer City Pack Pro: which should you pack?

The Aer Travel Pack 4 35L carries 11L more than the Aer City Pack Pro (35L vs. 24L), while the Aer City Pack Pro is the lighter pack at 1.2kg (vs. 1.8kg). For carry-on flexibility, the Aer City Pack Pro fits 94% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Aer Travel Pack 4 35L; if you want to travel lighter, the Aer City Pack Pro is the better call.