Does the Tortuga Pro Backpack 40L fit Allegiant's carry-on bag limit?

Yes. The Tortuga Pro Backpack 40L is within the Allegiant carry-on bag limit of 22 × 16 × 10 in (55 × 40 × 25 cm) on every side: height 0 in, width +2.0 in, depth +2.0 in.

Allegiant limit 22 × 16 × 10 in (55 × 40 × 25 cm) · Allegiant baggage page, checked 2026-10-26Tortuga Pro Backpack 40L 22 × 14 × 8 in (55 × 35 × 20 cm) · maker’s page

Tortuga Pro Backpack 40L in the Allegiant sizer

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FRONTSIDE16 in wide10 in deep22 in tall
Allegiant carry-on bag limitTortuga Pro Backpack 40L, as listedDrawn to scale
FRONTSIDE14 in wide8 in deep18 in tall
Allegiant · Personal item

Tortuga Pro Backpack 40L

Too bigNo. The Tortuga Pro Backpack 40L is larger than the Allegiant personal item limit of 18 × 14 × 8 in (45 × 35 × 20 cm) in height: height −4.0 in, width 0 in, depth 0 in.
LimitBagRoomHeight, in1822−4.0 inWidth, in14140 inDepth, in880 inWeight, kgnone2—

Must fit completely under the seat.

Other bags for Allegiant

BagVerdict
Osprey Farpoint 40Fits
Osprey Fairview 40Fits
Osprey Daylite Plus 20Fits
Cotopaxi Allpa 35LFits
Aer Travel Pack 3Fits

Pro Backpack 40L on other airlines

AirlineVerdict
DeltaFits
UnitedFits
AmericanFits
SouthwestFits
JetBlueFits
SpiritFits
FrontierFits
RyanairFits
All 18 airlines for the Pro Backpack 40L

Questions

Is the Tortuga Pro Backpack 40L allowed as Allegiant carry-on bag?

Yes. The Tortuga Pro Backpack 40L is within the Allegiant carry-on bag limit of 22 × 16 × 10 in (55 × 40 × 25 cm) on every side: height 0 in, width +2.0 in, depth +2.0 in.

Is the Tortuga Pro Backpack 40L allowed as Allegiant personal item?

No. The Tortuga Pro Backpack 40L is larger than the Allegiant personal item limit of 18 × 14 × 8 in (45 × 35 × 20 cm) in height: height −4.0 in, width 0 in, depth 0 in.