Allegiant Air: battery and item rules and carry-on size limits
This page lists Allegiant Air's own rules that we have reviewed. They apply when Allegiant Air operates the flight. Security screening (TSA) and dangerous goods (FAA) rules apply on top of them; each item page lists all three.
Most recent review on this page: 2026-10-06.
Allegiant Air rules for items
Spare lithium-ion battery
Allegiant Air policy
Allowed, with the conditions listed
Allegiant requires spare uninstalled lithium batteries to be carried in carry-on baggage.
Being rechecked: we are comparing this rule with its source again, so it is not shown. Check the official source below.
Source: Allegiant Air: Restricted Articles. Reviewed on 2026-10-06.
Allegiant Air policy
Not allowed
Allegiant does not permit spare uninstalled lithium batteries in checked baggage.
Being rechecked: we are comparing this rule with its source again, so it is not shown. Check the official source below.
Source: Allegiant Air: Restricted Articles. Reviewed on 2026-10-06.
Can you bring spare lithium-ion batteries on Allegiant Air? (with the TSA and FAA rules that also apply)
Allegiant Air carry-on and personal item size
Limits are shown in the units the airline uses. Fitting the size does not mean the bag is free: fare inclusion is shown separately.
Carry-on bag
| Length | 22 in |
|---|---|
| Width | 16 in |
| Height | 10 in |
| Length + width + height | Not checked yet |
| Weight | Not checked yet |
| Number of bags | Not checked yet |
Being rechecked: we are comparing this rule with the airline's page again, so it is not shown.
Source: Allegiant Air: Carry-On and Checked Baggage Policy, Size & Fees. Reviewed on 2026-10-06.
Checked bag
| Length | Not checked yet |
|---|---|
| Width | Not checked yet |
| Height | Not checked yet |
| Length + width + height | 80 in |
| Weight | 50 lb |
| Number of bags | Not checked yet |
Being rechecked: we are comparing this rule with the airline's page again, so it is not shown.
Source: Allegiant Air: Carry-On and Checked Baggage Policy, Size & Fees. Reviewed on 2026-10-06.
Personal item
| Length | 18 in |
|---|---|
| Width | 14 in |
| Height | 8 in |
| Length + width + height | Not checked yet |
| Weight | Not checked yet |
| Number of bags | Not checked yet |
Being rechecked: we are comparing this rule with the airline's page again, so it is not shown.
Source: Allegiant Air: Carry-On and Checked Baggage Policy, Size & Fees. Reviewed on 2026-10-06.
Check an item for a Allegiant Air flight
The item checker combines Allegiant Air's rules with the security screening and dangerous goods rules for your item. For batteries, the Wh calculator works out the watt-hour rating.
Official sources
- Allegiant Air: Carry-On and Checked Baggage Policy, Size & Fees (source checked on 2026-10-06)
- Allegiant Air: Restricted Articles
This page lists rules as the official sources state them, for travel departing the United States. It is not a decision about your item: security officers and your airline make the final call, and rules can change after the review dates shown. Destination customs and quarantine rules are not checked. See the terms and disclaimer.