Fastpack BP 450 AW IV

Lowepro Fastpack BP 450 AW IV is a 28L, 1.4kg3.1lb travel backpack measuring 52×33×24cm20.5×13×9.5in. It fits the carry-on size limit of 14 of 36 major airlines and the personal-item limit of 0 of 26. Under the seat, its 24cm9.4in side is over the 20cm7.9in limit at 15 of the 26 airlines it misses. Specs from lowepro.com, checked September 2026.

Volume: 28Lfixed size
Weight: 1.4kg3.1lb3.1lb1.4kg
Carry-on: 14/36airlines fit it
Personal item: 0/26under-seat limits

Dimensions: 52×33×24cm20.5×13×9.5in 20.5×13×9.5in52×33×24cm
Price: $189.95 as of September 2026
Laptop: up to 16"
Opening: Panel access, side access + full back panel
Warranty: not published
Compartments: 2
Bottle pockets: 2

Organizer
Water-resistant
Rain cover
Hip belt (hideable)
Camera compartment

Material: 600D solution-dyed polyester, recycled 420D nylon ripstop with carbonate PU coating

Fits a full-frame mirrorless body with grip and 4-5 lenses, or 2 bodies
Collapsible divider converts it to a full daypack
Padded stow-away waist belt

Last checked: 2026-09. Prices and specs may have changed.

Does the Lowepro Fastpack BP 450 AW IV fit airline carry-on limits?

Draw against

Too bigToo big on Ryanair. cabin bag 55×40×20cm21.5×15.5×8in · under the seat 40×30×20cm15.5×12×8in. Bag in cminches, turned to fit.

Flag as a tight fit undercm spare

Airline	Carry-on	Personal item	Cabin-bag weight
Air Arabia	Too bigToo big	Too bigToo big	5.6kg to pack (of 7kg)12.3lb to pack (of 15.4lb)
Air CanadaCabin bag not on every fare	Too bigToo big	Too bigToo big	No published limitNo published limit
Air FranceCabin bag not on every fare	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	10.6kg to pack (of 12kg shared with personal item)23.4lb to pack (of 26.5lb shared with personal item)
Air India	Too bigToo big	No published limit	5.6kg to pack (of 7kg)12.3lb to pack (of 15.4lb)
AirAsia	Too bigToo big	Too bigToo big	5.6kg to pack (of 7kg shared with personal item)12.3lb to pack (of 15.4lb shared with personal item)
Alaska Airlines	Too bigToo big	No published limit	No published limitNo published limit
Allegiant AirCabin bag not on every fare	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	No published limitNo published limit
American Airlines	Too bigToo big	Too bigToo big	No published limitNo published limit
ANA (All Nippon Airways)	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	8.6kg to pack (of 10kg shared with personal item)19lb to pack (of 22lb shared with personal item)
AviancaCabin bag not on every fare	Tight fit (1cm spare)Tight fit (0.4in spare)	No published limit	8.6kg to pack (of 10kg)19lb to pack (of 22lb)
British Airways	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	No published limitNo published limit
Cebu Pacific	Too bigToo big	Too bigToo big	8.6kg to pack (of 10kg shared with personal item)19lb to pack (of 22lb shared with personal item)
Delta Air Lines	Too bigToo big	No published limit	No published limitNo published limit
easyJetCabin bag not on every fare	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	13.6kg to pack (of 15kg)30lb to pack (of 33.1lb)
Emirates	Too bigToo big	No published limit	5.6kg to pack (of 7kg)12.3lb to pack (of 15.4lb)
Frontier AirlinesCabin bag not on every fare	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	14.5kg to pack (of 15.9kg)32lb to pack (of 35.1lb)
Gol Linhas Aereas	Tight fit (1cm spare)Tight fit (0.4in spare)	No published limit	8.6kg to pack (of 10kg)19lb to pack (of 22lb)
IndiGo	Tight fit (1cm spare)Tight fit (0.4in spare)	No published limit	5.6kg to pack (of 7kg)12.3lb to pack (of 15.4lb)
JetBlue Airways	Too bigToo big	Too bigToo big	No published limitNo published limit
KLMCabin bag not on every fare	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	10.6kg to pack (of 12kg shared with personal item)23.4lb to pack (of 26.5lb shared with personal item)
LATAM Airlines	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	10.6kg to pack (of 12kg)23.4lb to pack (of 26.5lb)
LufthansaCabin bag not on every fare	Too bigToo big	Too bigToo big	6.6kg to pack (of 8kg)14.6lb to pack (of 17.6lb)
Norwegian Air ShuttleCabin bag not on every fare	Too bigToo big	Too bigToo big	8.6kg to pack (of 10kg shared with personal item)19lb to pack (of 22lb shared with personal item)
Qantas	Too bigToo big	No published limit	5.6kg to pack (of 7kg shared with personal item)12.3lb to pack (of 15.4lb shared with personal item)
Qatar Airways	Too bigToo big	No published limit	5.6kg to pack (of 7kg)12.3lb to pack (of 15.4lb)
RyanairCabin bag not on every fare	Too bigToo big	Too bigToo big	8.6kg to pack (of 10kg)19lb to pack (of 22lb)
SAS	Too bigToo big	Too bigToo big	6.6kg to pack (of 8kg)14.6lb to pack (of 17.6lb)
Singapore Airlines	FitsFits	Too bigToo big	5.6kg to pack (of 7kg)12.3lb to pack (of 15.4lb)
Southwest Airlines	Tight fit (1cm spare)Tight fit (0.4in spare)	No published limit	No published limitNo published limit
Turkish Airlines	Too bigToo big	Too bigToo big	6.6kg to pack (of 8kg)14.6lb to pack (of 17.6lb)
United AirlinesCabin bag not on every fare	Too bigToo big	Too bigToo big	No published limitNo published limit
Vietjet Air	Too bigToo big	Too bigToo big	5.6kg to pack (of 7kg shared with personal item)12.3lb to pack (of 15.4lb shared with personal item)
VolarisCabin bag not on every fare	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	8.6kg to pack (of 10kg)19lb to pack (of 22lb)
VuelingCabin bag not on every fare	Too bigToo big	Too bigToo big	8.6kg to pack (of 10kg)19lb to pack (of 22lb)
WestJetCabin bag not on every fare	Too bigToo big	Too bigToo big	No published limitNo published limit
Wizz AirCabin bag not on every fare	Too bigToo big	Too bigToo big	8.6kg to pack (of 10kg)19lb to pack (of 22lb)

Compared in any orientation against each airline's published size limit. A tight fit has under 2cm to spare, so a packed soft bag may not pass a sizer. Set it to 0 to turn the warning off. Weight is what the airline allows in the cabin minus this bag's empty 1.4kg3.1lb. Limits and sources. Own a different bag? Check it against every airline.