Does the Osprey Daylite Plus 20 fit Qantas's overhead bag limit?

Only if it is not packed full. The Osprey Daylite Plus 20 is listed 1.0 cm deeper than the Qantas overhead bag limit (56 × 36 × 23 cm (22 × 14 × 9 in)), and fine on height and width. Packed less full, a soft pack gets thinner.

Qantas limit 56 × 36 × 23 cm (22 × 14 × 9 in) · Qantas baggage page, checked 2026-10-26Osprey Daylite Plus 20 48 × 28 × 24 cm (18.9 × 11.02 × 9.45 in) · maker’s page

Osprey Daylite Plus 20 in the Qantas sizer

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FRONTSIDE36 cm wide23 cm deep56 cm tall
Qantas overhead bag limitOsprey Daylite Plus 20, as listedDrawn to scale

Other bags for Qantas

Daylite Plus 20 on other airlines

AirlineVerdict
DeltaFits if not packed full
UnitedFits if not packed full
AmericanFits if not packed full
SouthwestFits
JetBlueFits if not packed full
SpiritFits
FrontierFits
AllegiantFits
All 18 airlines for the Daylite Plus 20

Questions

Is the Osprey Daylite Plus 20 allowed as Qantas overhead bag?

Only if it is not packed full. The Osprey Daylite Plus 20 is listed 1.0 cm deeper than the Qantas overhead bag limit (56 × 36 × 23 cm (22 × 14 × 9 in)), and fine on height and width. Packed less full, a soft pack gets thinner.

How much can I pack in the Osprey Daylite Plus 20 on Qantas?

Qantas allows 7 kg for the overhead bag. The pack weighs 0.585 kg (1.29 lb) empty, which leaves about 6.4 kg for your things.