Allegiant Airlines Baggage Allowance: Personal Item, Carry-On, Checked Bags, Sizes & Fees

Under standard Allegiant Airlines baggage policy, every ticketed passenger is permitted one free personal item that must fit completely under the seat in front of them. Overhead carry-on bags and checked luggage are not included in standard base fares and must be purchased as optional travel add-ons.

Personal items must measure no more than 8 × 14 × 18 inches (20 × 35 × 45 cm). Paid carry-on bags must measure within 10 × 16 × 22 inches (25 × 40 × 55 cm) and fit into overhead bins. Standard checked bags may weigh up to 50 pounds (22 kg) and measure up to 80 linear inches (203 cm). Because Allegiant uses dynamic, route-specific pricing, baggage fees vary depending on your route, travel dates, and when the bag is added to the booking.

Editorial Notice: FareWander is an independent travel information guide and is not affiliated with, operated by, or authorized by Allegiant Air. Baggage rules and optional service charges are determined by Allegiant and may vary by route. Travelers should verify the exact charges and rules shown for their specific reservation on the official Allegiant platform prior to departure. Last reviewed: October 2026.

Allegiant Baggage Allowance at a Glance

Allegiant Personal Item Size and Allowance

Every passenger flying on Allegiant Air can bring one complimentary personal item on board.

• Maximum Dimensions: 8 inches deep, 14 inches wide, and 18 inches high (20 × 35 × 45 cm).
• Stowage Location: The item must fit completely under the seat directly in front of you. Items that cannot slide underneath the forward seat cannot be transported as personal items.
• Common Examples: Small day backpacks, laptop bags, briefcases, purses, camera bags, and small tote bags.
• Exterior Measurements: Published dimensions include external hardware such as handles, wheels, side pockets, and exterior padding where applicable.
• Weight Restrictions: Allegiant publishes no official weight ceiling for personal items, provided the traveler can lift and maneuver the piece into the under-seat space without assistance.

A backpack can qualify as a free personal item if it fits within the published 8 × 14 × 18-inch dimensions and can be completely stowed underneath the seat. If a backpack exceeds these dimensions or does not fit under the seat, it must be paid for as a carry-on or gate-checked bag at higher airport rates.

Allegiant Carry-On Baggage Size and Fees

Carry-on luggage is a paid optional service on Allegiant. Standard base fares do not include an overhead carry-on.

• Cabin Allowance: One carry-on bag per ticketed passenger.
• Maximum Dimensions: 10 inches deep, 16 inches wide, and 22 inches high (25 × 40 × 55 cm).
• Stowage: The bag must fit inside the overhead storage bin.
• Exterior Elements: Dimensions include wheels, handles, and external pockets.
• Dynamic Fee Structure: Allegiant does not publish a single universal carry-on rate. Carry-on pricing is set dynamically based on route distance, seasonal demand, and when the bag is purchased. Advanced purchases made through the website or mobile app are typically less expensive than fees assessed at the airport counter or departure gate.

Arriving at the gate with an unpurchased or oversized carry-on will require paying applicable airport/gate baggage charges to place the bag in the cargo hold.

Personal Item vs. Carry-On Bag

Allegiant Checked Baggage Allowance

Checked luggage is an optional paid ancillary on Allegiant. Each checked bag is assessed per passenger, per segment.

• Standard Weight Limit: Up to 50 pounds (22 kg) per bag.
• Standard Size Limit: Up to 80 linear inches (203 cm).
• Linear Inches Defined: The sum of total exterior dimensions:
  • Linear Inches = Length + Width + Height
• Example: A standard rolling suitcase measuring 30 inches tall, 20 inches wide, and 10 inches deep equals 60 linear inches (30 + 20 + 10 = 60). This bag sits safely within Allegiant's 80-linear-inch standard allowance.

Measurements must include wheels, extension handles, and bulging side pockets where official guidelines apply.

Allegiant Overweight Baggage

Checked bags weighing more than the standard 50-pound limit are subject to additional overweight fees per flight segment.

A bag weighing exactly 50 pounds is accepted under standard checked baggage rates. A bag weighing 51 pounds enters the first overweight tier.

Allegiant Oversized Baggage

Checked baggage measuring larger than the standard 80 linear inches (203 cm) incurs additional oversized fees:

• Oversized Threshold: Checked items exceeding 80 linear inches are charged an additional oversized handling fee per flight segment.
• Maximum Sizing Limits: Acceptance of luggage exceeding 80 linear inches is subject to aircraft cargo hold dimensions and carrier space limitations. Confirm oversize exceptions with the carrier in advance for non-standard containers.
• Cumulative Charges: Oversized and overweight penalties compound. A bag that measures over 80 linear inches and weighs 58 pounds is subject to the standard bag rate, the oversized surcharge, and the overweight surcharge simultaneously.

Allegiant Excess Baggage Allowance

Passengers can pre-purchase checked baggage allowances online prior to travel:

• Online Purchase: Allegiant generally permits travelers to pre-purchase up to 4 checked bags per passenger online or via the mobile app, depending on flight and route capacity.
• Airport Counter Check: Additional bags beyond online booking allowances (such as a 5th checked piece) may be added at the airport ticket counter, subject to available cargo space and aircraft weight restrictions.
• Cargo Discretion: Carrier ground personnel and gate agents reserve the right to restrict excess luggage on flights where FAA operational weight and balance constraints apply.

How Much Does Allegiant Baggage Cost?

Allegiant’s baggage pricing is unbundled and dynamic. The carrier does not utilize a single, flat fee across all routes.

• Route and Season: Pricing varies depending on flight distance, seasonal demand, and competitive market conditions.
• Timing of Purchase: Allegiant states that airport baggage fees are higher than advance purchases. Adding bags during initial flight booking or before arriving at the airport yields lower published pricing than paying at the check-in counter or departure gate.
• Per Segment Pricing: Baggage fees apply per passenger, per segment. For a round-trip journey with two flight segments, baggage charges are billed separately for the outbound and return flights.
• Verifying Charges: To see the exact cost for your flight, review the optional services fee tool on Allegiant's website or check the pricing summary in your booking dashboard.

When Should You Add Baggage to an Allegiant Booking?

Travelers have several opportunities to add baggage to their itinerary:

1. During Initial Booking: Adding bags when booking your flight ticket offers the lowest available pricing tier.
2. After Booking via Manage Travel: You can add carry-on or checked baggage at any point before travel by accessing Allegiant Manage Travel on the website or mobile app.
3. During Online Check-In: You can purchase luggage when digital check-in opens 24 hours prior to departure.
4. At the Airport Ticket Counter or Gate: Purchasing luggage at the airport carries the highest fees.

To modify or add bags to an existing trip, consult our Allegiant Manage Booking Guide.

Understanding Baggage Fees Per Segment

Allegiant assesses baggage charges on a per-segment basis:

• A flight segment refers to one continuous flight between a departure airport and an arrival airport.
• If you book a non-stop round trip, your journey contains two segments.
• If you check one bag each way, you will pay the applicable checked-bag charge twice (once for the outbound flight and once for the return flight).
• "Per segment" does not mean "per complete round trip." Account for every leg of your travel when budgeting for baggage costs.

When Should I Drop Off Checked Baggage?

Allegiant enforces strict pre-departure airport deadlines. Checked luggage drop-off times are separate from passenger check-in deadlines.

Critical Notice on Flight Delays: Operational flight delays do not automatically extend counter check-in or checked baggage drop deadlines. Unless Allegiant airport personnel specifically advise otherwise, you must drop off checked bags according to the originally scheduled departure time.

For more details on airport arrival cutoffs, review our dedicated Allegiant Check-In Guide.

Gate-Checked Baggage

Certain situations may require a bag to be checked at the departure gate:

• Full Overhead Bins: If cabin overhead bins fill to capacity before boarding completes, gate agents may gate-check remaining paid carry-on bags into the cargo hold.
• Oversized Carry-On Items: Carry-on bags exceeding the 10 × 16 × 22-inch dimensions will be rejected from cabin boarding and gate-checked at applicable airport rates.
• Family Gear: Infant strollers and child safety seats are routinely tagged and gate-checked at boarding.

Applicable airport baggage charges depend on the circumstances: paid carry-on bags forced into the hold due to limited cabin bin space are typically checked without additional penalties, whereas unpaid or oversized items brought to the boarding gate incur standard airport gate check fees.

Allegiant Stroller and Car Seat Policy

Families traveling with infants or young children receive complimentary allowances for select childcare items:

• Complimentary Items: Each fare-paying passenger traveling with a child may check one stroller and one car seat free of charge.
• Check-In Options: Parents can check these items at the airport ticket counter before clearing TSA security or take them through security to be gate-checked at the boarding jet bridge.
• Baggage Allowance: Strollers and car seats do not count against the traveler's personal item or standard checked baggage allowance.
• Child Restraints In-Cabin: FAA-approved child safety restraint seats may be used in an aircraft seat if a separate passenger seat has been purchased for the child.

Wheelchairs, Mobility Aids and Assistive Devices

Under U.S. Department of Transportation (DOT) Title 14 CFR Part 382 regulations and Allegiant policy, mobility aids are handled with priority:

• No Extra Fee: Wheelchairs, mobility scooters, walkers, crutches, and canes are transported free of charge and do not count toward personal item or checked luggage allowances.
• Stowage: Folding manual wheelchairs and walkers may be stowed in designated onboard cabin storage space on a first-come, first-served basis, or gate-checked into the cargo hold.
• Battery-Powered Devices: Wheelchairs powered by spillable, non-spillable, or lithium-ion batteries must adhere to FAA safety and hazardous-material handling requirements. Travelers should notify Allegiant Customer Care at least 48 hours prior to travel to coordinate battery disconnection and handling protocols.

Medical Equipment and Assistive Devices

Qualified medical devices are permitted aboard Allegiant flights in accordance with federal accessibility rules:

• Allowance Exemption: Medically necessary equipment—such as FAA-approved Portable Oxygen Concentrators (POCs), CPAP machines, and dialysis devices—does not count toward your carry-on or personal item allowance.
• Operating Standards: Devices must be battery-operated; Allegiant aircraft do not provide electrical outlets for medical equipment in passenger cabins.
• Labeling: Medical devices should be packaged separately from ordinary personal items and electronics to facilitate screening at the TSA checkpoint and verification by gate personnel.

Allegiant Sports Equipment and Musical Instruments

Sports Equipment

Sporting gear can generally be checked as baggage, subject to applicable weight, dimension, and handling criteria:

• Golf Equipment: One golf bag containing clubs, balls, and shoes is accepted as checked baggage. Standard overweight fees apply if the equipment exceeds 50 pounds.
• Skis and Snowboards: One ski bag (containing skis and poles) or one snowboard bag, along with one boot bag, is typically counted as a single checked item.
• Bicycles: Bicycles must have handlebars secured sideways, pedals removed, and be packed in an approved hard-sided protective container or bicycle travel box. Specialty oversized equipment fees apply.
• General Guidelines: Sports equipment exceeding standard weight or dimensional thresholds may incur additional handling surcharges. For niche sporting gear, verify requirements directly on Allegiant's official platform prior to packing.

Musical Instruments

Allegiant permits musical instruments to travel in the cabin or cargo hold depending on size:

• Cabin Transport: Small instruments (such as violins, flutes, or small ukuleles) may be brought into the cabin as a paid carry-on if they fit safely inside overhead bins, or as a free personal item if they fit completely under the forward seat.
• Seat-Booked Instruments: Larger instruments (such as cellos) that cannot be safely stowed in overhead bins or under seats can be transported in the passenger cabin only if an additional ticket is purchased for an adjacent seat.
• Checked Instruments: Instruments checked into the cargo hold must be packed in a rigid, hard-shell flight case and comply with standard checked baggage weight and linear dimension limits.

Prohibited Items, Lithium Batteries and Power Banks

All luggage on Allegiant flights must comply with Transportation Security Administration (TSA) screening requirements and Federal Aviation Administration (FAA) hazardous material safety directives:

• Liquids (Cabin): TSA's 3-1-1 rule restricts carry-on liquids, gels, and aerosols to containers of 3.4 ounces (100 ml) or less packed in a single clear, quart-sized bag.
• Hazardous Goods: Fireworks, flammable liquids, strike-anywhere matches, compressed gas canisters, and toxic substances are strictly prohibited across all checked and carry-on baggage.
• Firearms and Ammunition: Unloaded firearms may only be transported in checked luggage, locked inside a hard-sided container, and must be declared to an Allegiant ticket counter agent upon arrival at the airport. Ammunition must be packaged in secure consumer boxes.

Lithium Batteries and Power Banks

Federal aviation safety mandates strictly govern the transportation of lithium-ion batteries:

• Carry-On Requirement: Spare lithium-ion batteries, loose battery cells, and portable electronic power banks must always be packed in carry-on baggage.
• Checked Bag Ban: Spare lithium batteries and power banks are strictly prohibited in checked baggage due to cargo fire hazards.
• Installed Batteries: Devices with installed batteries (such as laptops or tablets) may be transported in checked luggage if completely powered down, though keeping high-value electronics in cabin luggage is strongly recommended.

Backpacks, Purses, and Cabin Bag Combinations

Bringing a Backpack on Allegiant

A standard backpack can be brought aboard Allegiant as your free personal item, provided its total measurements do not exceed 8 × 14 × 18 inches and it can be placed completely under the seat in front of you.

If you carry a large hiking pack, framed backpack, or an overstuffed bag exceeding these dimensions, it will not qualify as a personal item. It will need to be purchased as an overhead carry-on (up to 10 × 16 × 22 inches) or checked at the ticket counter.

Purse, Backpack, and Carry-On Combinations

Under Allegiant's cabin baggage policy:

• Every passenger receives one free personal item.
• Passengers who pay the carry-on fee may bring one overhead carry-on bag.
• If you arrive at the gate with a purse, a backpack, and a rolling carry-on, you have three cabin items. You must either pack your purse inside your backpack/carry-on so that you only present two items (one personal item and one paid carry-on), or pay an airport gate fee to check the third piece into the cargo hold.

Can I Add Baggage After Booking?

Yes. Passengers can add carry-on or checked baggage to an existing reservation up until check-in closes.

To add baggage after booking:

1. Navigate to the official Allegiant website or open the mobile app.
2. Open the Manage Travel portal.
3. Retrieve your booking using your 6-character confirmation code and the passenger's last name.
4. Locate the baggage add-on section.
5. Select the number of carry-on or checked bags for each passenger and flight segment.
6. Review the current pricing displayed on the checkout screen.
7. Enter payment details to finalize your purchase and save your updated itinerary.

Review full booking management procedures in our Allegiant Manage Booking Guide.

Baggage for Third-Party Bookings

If your ticket was purchased through an online travel agency (OTA) or third-party corporate portal:

• You can generally retrieve your reservation on Allegiant’s website using the airline's 6-character confirmation code to view travel details and add baggage.
• In some instances where an agency retains direct booking control, ticket adjustments or ancillary purchases may need to be coordinated through the original booking vendor.

Lost, Delayed, or Damaged Baggage

If your checked bag fails to arrive at the carousel or arrives damaged, take immediate action before leaving the airport terminal:

• File an In-Person Report: Locate the Allegiant Baggage Service Office or speak with an Allegiant station representative in the baggage claim area immediately.
• Obtain File Documentation: Complete a Property Irregularity Report (PIR) and retain your copy with the unique file reference number.
• Save Your Bag Tags: Keep your original baggage claim tags, boarding pass, and travel receipts.
• Adhere to Deadlines: Allegiant requires visible luggage damage to be reported in person within carrier reporting windows (typically within 4 hours of flight arrival for domestic routes).
• Track Status: Monitor your baggage tracing status through Allegiant's online baggage claim portal using your claim reference number.

Collecting Your Baggage at Destination Claim

Upon arrival at your destination airport:

• Proceed to the designated carousel at the baggage claim hall.
• Cross-reference your baggage claim tag number with the sticker tag on the luggage handle before leaving the airport to avoid accidental bag swaps.
• If your bag has not arrived after the flight's luggage offloading is complete, report the missing item to an Allegiant agent immediately before exiting security boundaries.

Baggage Allowance for Children, Infants & TSA Security Rules

Baggage Allowance for Children and Infants

• Lap Infants: Children under age 2 traveling on an adult's lap do not receive a separate carry-on or checked luggage allowance.
• Ticketed Children: Children traveling in their own reserved seat receive the same baggage purchase options as adult passengers.
• Stroller & Car Seat Allowance: Each fare-paying adult traveling with a child may check one stroller and one car safety seat without additional baggage fees.
• Diaper Bags: A standard diaper bag brought into the cabin counts toward your one personal item allowance unless it fits within the dimensions of an already-permitted bag.

Airline Baggage Allowance vs. TSA Security Rules

It is essential to distinguish carrier baggage allowances from federal airport security regulations:

• Allegiant Airlines governs luggage allowances, baggage sizing, weight limits, and optional baggage fees.
• The TSA (Transportation Security Administration) governs airport screening, checkpoint security, prohibited items, and fluid limits (the 3-1-1 liquids rule).
• Compliance with Allegiant's luggage size limits does not exempt a passenger from TSA checkpoint screening requirements.

Important Pre-Departure Checklist & Related Guides

• Personal Item: Ensure measurements do not exceed 8 × 14 × 18 inches with hardware included.
• Carry-On Bag: Ensure dimensions fit within 10 × 16 × 22 inches and that the bag was added to your booking.
• Checked Bag Weight: Weigh your luggage at home to confirm it is 50 pounds (22 kg) or less.
• Checked Bag Sizing: Verify total dimensions do not exceed 80 linear inches (Length + Width + Height).
• Advance Purchase: Purchase luggage in advance through Allegiant Manage Booking to avoid higher airport counter fees.
• Batteries Packed in Cabin: Keep all spare lithium batteries, vape pens, and power banks in your personal item or carry-on.
• Drop-Off Window: Arrive with enough time to complete bag drop between 2 hours and 1 hour before scheduled departure.
• Check-In Deadline: Complete check-in and secure your boarding pass at least 45 minutes prior to takeoff.

Related Travel Guides

• Allegiant Air Overview & Policies
• Allegiant Airlines Check-In Guide & Cutoffs
• Allegiant Airlines Manage Booking & Add-Ons
• Allegiant Live Flight Status & Tracking
• Allegiant Seat Selection & Legroom Plus Options
• Allegiant Cancellation & Refund Policies
• Allegiant Customer Care & Contact Directory

Sources & Official References

• Allegiant Air Official Baggage Policy: allegiantair.com/baggage-1 – Cabin dimensions, 50-lb checked bag rules, and dynamic fee policies.
• Allegiant Air Optional Services & Fees: allegiantair.com/popup/optional-services-fees – Route-specific ancillary fee lookup.
• Transportation Security Administration (TSA): tsa.gov/travel/security-screening – 3-1-1 liquids rule and prohibited items.
• Federal Aviation Administration (FAA) PackSafe: faa.gov/hazmat/packsafe – Lithium battery and hazardous material regulations.
• U.S. Department of Transportation (DOT): transportation.gov/airconsumer – Title 14 CFR Part 382 mobility and medical device protections.