Ortlieb Commuter Daypack City vs. Tom Bihn Smart Alec

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

Ortlieb Commuter Daypack City

Front facing view of the Ortlieb Commuter Daypack City
Capacity21 L
Weight0.75 kg
Dimensions50×30×15.5 cm
Airline fit92%
Price$160

Feature by feature

Ortlieb Commuter Daypack CityFeatureTom Bihn Smart Alec
Storage
N Compression N
None Expanded Capacity None
0 Opening 0
N Passport
N Passthrough N
Carry
Y Backpack Y
removable Hip Belt removable
removable Sternum Strap removable
Inside
15in Laptop 17in
1 Main Compartments 0
Y Organizer Y
Outside
× Hard Shell ×
N Rain-fly N
N Water Bottle Holder N
Y Water Resistant Y
Material
PS33

Tom Bihn Smart Alec

Front facing view of the Tom Bihn Smart Alec
Capacity26 L
Weight0.9 kg
Dimensions47×30×21 cm
Airline fit74%
Price$190

Key differences between the Ortlieb Commuter Daypack City and Tom Bihn Smart Alec

Both have: backpack straps, hip belt, sternum strap, 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. 138 accept both. 35 accept only the Ortlieb Commuter Daypack City, and 2 accept only the Tom Bihn Smart Alec.

Only the Ortlieb Commuter Daypack City fits

Air Baltic, Air China, Air Malta, Air Niugini, Air Serbia, Air Seychelles, Asiana Airlines, ATA Airlines, Belavia, Blue Air, Bulgaria Air, China Eastern, Emirates Airlines, Enter Air, flybe, Icelandair, InselAir, Juneyao 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 Tom Bihn Smart Alec fits

Regional Express, Virgin Australia.

Ortlieb Commuter Daypack City vs. Tom Bihn Smart Alec: which should you pack?

The Tom Bihn Smart Alec carries 5L more than the Ortlieb Commuter Daypack City (21L vs. 26L), while the Ortlieb Commuter Daypack City is the lighter pack at 0.75kg (vs. 0.9kg). For carry-on flexibility, the Ortlieb Commuter Daypack City fits 92% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Tom Bihn Smart Alec; if you want to travel lighter, the Ortlieb Commuter Daypack City is the better call.