Allegiant carry-on size

Allegiant’s published carry-on limit is 10 × 16 × 22 inches (25 × 40 × 55 cm), exterior including wheels, pockets, handles, and decorations. A full-size carry-on is paid on the base fare — not free by default. Every ticket still includes one free personal item at 8 × 14 × 18 inches under the seat. Carry-on fees are cited in a $10–$75 range by route and when you add the bag; the airport fee is often $75. Confirm your exact city-pair price on allegiantair.com / the Baggage Fees Calculator — do not treat any single nationwide dollar as fixed.

Stale size conflict: Some “Changed Bag Fees & Policy” text still shows 9 × 14 × 22 in. Prefer CoC + /baggage-1 + Optional Services (10 × 16 × 22). Do not use 9×14×22 unless the live page still shows it.

Personal item stale: Older popup text 7 × 15 × 16 — prefer 8 × 14 × 18 (personal item). Confirm on the live site.

Allegiant publishes 10 × 16 × 22 — not Frontier’s 24 × 16 × 10 family. Do not silently reorder axes when comparing. Like other ULCC-style carriers, “fits overhead” does not mean “free on the base fare.”

• Free with ticket: one personal item (8 × 14 × 18 in) under the seat on the base fare.
• Paid: full-size carry-on — route- and timing-priced; typically rises booking → pre-departure → airport. Exact $ via Manage Travel / Baggage Fees Calculator — never invent a static nationwide carry-on $.
• Checked bags are also paid add-ons — see Allegiant baggage fees; do not duplicate fee tables here.
• Also free when Allegiant states them (cabin items that do not count as paid bags — confirm the full list on the live baggage FAQ): car seats/strollers; mobility aids; medical equipment (e.g. POC, diabetic supplies); food for in-flight consumption; coat/jacket; diaper bag; umbrella.
• Military / loyalty bag waivers: confirm on allegiantair.com rather than assuming unpublished waivers.
• No named bag bundles found in research — do not invent WORKS-style product names. Optional seats/priority/bags products may appear in booking — confirm live names only.

1. Carry-on is often paid. Travelers used to legacy carriers (Delta, Southwest) often miss this ULCC model — base fare = personal item only.
2. Strict exterior measurement. Unpaid or oversize carry-ons → airport / gate fees. Measure including wheels, pockets, handles, and decorations.
3. Axis order matters. Allegiant publishes 10 × 16 × 22, not Frontier’s 24 × 16 × 10 — don’t swap axes when shopping or comparing.
4. Stale pages may still show 9 × 14 × 22. Prefer CoC + /baggage-1 + Optional Services; confirm live.
5. Cabin weight limit not published in indexed excerpts; check the airline for rare route exceptions.
6. Oversized personal item may incur an at-airport fee ($50–$75 indexed — confirm live); see personal item.
7. No invented named bag bundles — Allegiant research found none.

• If you need overhead space, add the carry-on at booking (usually the cheapest tier) via Optional Services / the Baggage Fees Calculator.
• Measure including wheels/handles/pockets; stay within 10 × 16 × 22 in (25 × 40 × 55 cm).
• Use only the free personal item (8 × 14 × 18) if packing light.
• Avoid airport purchase — indexed airport fee is often $75.
• Confirm the live Baggage Fees Calculator for your city-pair before travel — route pricing changes.

Look for hard or soft carry-ons marketed at or under Allegiant’s published 10 × 16 × 22 inches (exterior), and confirm with a tape measure before you fly. Soft under-seat bags at or under 8 × 14 × 18 cover the free personal-item slot. Product marketing often reorders depth/width/height — match Allegiant’s published axis order, not a competitor’s.

Disclosure: As an Amazon Associate, BagRule may earn from qualifying purchases. Product cards are optional suggestions — always measure against Allegiant’s published dims.

(Soft Amazon: up to 1–2 product cards may be placed here in production — carry-on compliant + optional under-seat personal item. No hard sell.)

What is the Allegiant carry-on size limit?
Official indexed figure: 10 × 16 × 22 inches (25 × 40 × 55 cm), exterior including wheels, pockets, and handles. Prefer Allegiant’s published inch order. Older pages may still show 9 × 14 × 22 — confirm live. Cabin weight limit is not published; check the airline for rare route exceptions.

Does Allegiant charge for carry-on bags?
Yes — carry-on is a paid add-on on the base fare (ULCC model). Indexed range $10–$75 by route and timing; airport often $75. Exact $ via the Baggage Fees Calculator — buy early.

Does Allegiant’s base fare include a free carry-on?
No. The base fare includes a free personal item only (8 × 14 × 18). Full carry-on is always an add-on unless a current optional product includes it — confirm the live booking path.

What if my bag doesn’t fit Allegiant’s size?
Expect airport / gate fees and/or forced check. Measure exterior dims before you fly.

What is Allegiant’s personal item size?
8 × 14 × 18 in (20 × 35 × 45 cm), free under the seat. Older popup 7 × 15 × 16 — prefer 8×14×18; confirm on the live site. Details: Allegiant personal item.

Is Allegiant carry-on the same as Frontier?
Different published axis order: Allegiant 10 × 16 × 22 vs Frontier 24 × 16 × 10 — both ULCC-style paid carry-ons on the base/Basic fare. Don’t assume free overhead; see Frontier carry-on size.

Fees and rules change. Confirm the latest size limits and live bag prices on allegiantair.com (Baggage Fees Calculator / Optional Services) before you travel. BagRule is an independent publisher and is not affiliated with Allegiant Air.