Does the Tumi Knight Sling Backpack fit Spirit Airlines?

Fits

Bag

35.6 × 22.9 × 10.9 cm

Empty 0.9 kg

Spirit Airlines carry-on

55.9 × 45.7 × 25.4 cm

18 kg

Verified 2026-09-26

FAQ

Does the Tumi Knight Sling Backpack fit Spirit Airlines?

Fits. Sides are sorted longest to shortest and compared with the airline limit the same way, so orientation does not matter.