KS Ultralight KS27 vs. Deuter Speed Lite 25
Two carry-on travel backpacks, compared spec for spec.
KS Ultralight KS27
| Capacity | 27 L |
| Weight | 0.3 kg |
| Dimensions | 55×28×16 cm |
| Airline fit | 87% |
| Price | $130 |
Feature by feature
| KS Ultralight KS27 | Feature | Deuter Speed Lite 25 |
|---|---|---|
| Storage | ||
| 2 | Compression | 4 |
| None | Expanded Capacity | None |
| 0 | Opening | 0 |
| top | Passport | top |
| N | Passthrough | N |
| Carry | ||
| Y | Backpack | Y |
| removable | Hip Belt | Y |
| removable | Sternum Strap | Y |
| Inside | ||
| N | Laptop | N |
| 2 | Main Compartments | 2 |
| N | Organizer | N |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 2, side | Water Bottle Holder | 2, side |
| Y | Water Resistant | Y |
| Material | |
| X-pac VX 07 YKK "waterproof zip" | |
Deuter Speed Lite 25
| Capacity | 25 L |
| Weight | 0.7 kg |
| Dimensions | 56×28×19 cm |
| Airline fit | 47% |
| Price | $120 |
Key differences between the KS Ultralight KS27 and Deuter Speed Lite 25
- Compression straps: 2 on the KS Ultralight KS27; 4 on the Deuter Speed Lite 25.
- Hip belt: Removable on the KS Ultralight KS27; Yes on the Deuter Speed Lite 25.
- Sternum strap: Removable on the KS Ultralight KS27; Yes on the Deuter Speed Lite 25.
Both have: passport pocket, backpack straps, 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. 89 accept both. 75 accept only the KS Ultralight KS27, and 0 accept only the Deuter Speed Lite 25.
Only the KS Ultralight KS27 fits
Aer Lingus, Aeroflot, Aerolineas Argentinas, Aeromexico, Air Baltic, Air Canada, Air Caraibes, Air China, Air France, Air India, Air Malta, Air Mauritius, Air Serbia, Air Seychelles, All Nipon Airways, ANA, Asiana Airlines, ATA Airlines, Austrian, Azerbaijan Airlines, Blue Air, Boliviana de Aviacion, Brussels Airlines, Bulgaria Air, China Eastern, Czech Airlines, Emirates Airlines, Enter Air, Ethiopian Airlines, Eurowings, Fiji Airways, Flair Air, flybe, Gol Linhas Aereas, Iberia, Icelandair, Indigo, InselAir, Interjet, Iran Air, Japan Airlines, Jet Airways, Juneyao Airlines, Kenya Airways, KLM, LATAM , LOT Polish, Lufthansa, Luxair, Mahan Air, Meridiana Fly, Mesa Airlines, Nordwind Airlines, Norwegian, Pakistan International, Peach, Porter Airlines, Royal Brunei Airlines, Ryanair, S7, SAS Scandinavian, Shandong Airlines, Shenzhen Airlines, Sky Airlines, Sun Express, Swiss Int'l Air Lines, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), TUI, Turkish Airlines, Ukraine International, VIM Airlines (Closed), Volotea, Xiamen.
KS Ultralight KS27 vs. Deuter Speed Lite 25: which should you pack?
The KS Ultralight KS27 carries 2L more than the Deuter Speed Lite 25 (27L vs. 25L), while the KS Ultralight KS27 is the lighter pack at 0.3kg (vs. 0.7kg). For carry-on flexibility, the KS Ultralight KS27 fits 87% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the KS Ultralight KS27; if you want to travel lighter, the KS Ultralight KS27 is the better call.