Aeromexico Carry-On & Check-In: Size, Weight and Rules

Last Updated: September 2026

Quick Answer: What Can You Bring on Aeromexico?

Aeromexico allows one carry-on bag measuring up to 55 × 40 × 25 cm, including wheels and handles, plus a personal item that fits under the seat. The weight allowance for these cabin items depends on the fare, route, and market. Aeromexico’s current Mexico-region information shows a combined cabin-baggage allowance of up to 10 kg for Basic fares and 15 kg for Classic, AM Plus and Premier fares, while some international markets have different conditions.

Online check-in generally opens 48 hours before domestic departure and 24 hours before international departure. However, passengers traveling on a Basic fare on a domestic Mexican route may have a 24-hour check-in window instead.

Your exact Aeromexico baggage allowance and check-in conditions depend on your itinerary, so check your booking before you travel.

Aeromexico Carry-On and Check-In at a Glance

Item	Current rule
Carry-on size	Maximum 55 × 40 × 25 cm
Carry-on measurement	Includes wheels and handles
Personal-item guidance	Should fit under the seat; Aeromexico recommends up to 45 × 35 × 20 cm
Recommended personal-item weight	Up to 3 kg
Cabin-baggage weight	Varies by fare and route; some Mexico-region fares allow 10–15 kg combined
Domestic online check-in	Generally opens 48 hours before departure
International online check-in	Generally opens 24 hours before departure
Basic fare on domestic Mexico routes	Check-in may open 24 hours before departure
Boarding pass	Available through digital and airport check-in options

Aeromexico’s baggage rules can differ by destination, fare family and market. The baggage allowance shown for your booking is the best reference.

What Is the Difference Between an Aeromexico Personal Item and Carry-On?

A personal item and a carry-on are two different types of cabin baggage.

A personal item is a smaller bag that must fit under the seat in front of you. Aeromexico gives examples such as a handbag, backpack, briefcase, laptop bag or similar item. It recommends that the personal item does not exceed 45 × 35 × 20 cm and weighs no more than 3 kg.

A carry-on bag is stored in the overhead compartment. Aeromexico’s maximum carry-on size is 55 × 40 × 25 cm, including wheels and handles.

The two items can have different allowances depending on your fare and route. In some Aeromexico fare markets, the airline applies a combined weight limit to the carry-on and personal item.

Simple way to remember the difference

• Personal item: under the seat
• Carry-on: overhead bin
• Personal item size: recommended maximum 45 × 35 × 20 cm
• Carry-on size: maximum 55 × 40 × 25 cm
• Weight: depends on your fare and route

If you are also traveling with checked luggage, review the current Aeromexico baggage allowance and fees before purchasing additional bags.

What Is the Aeromexico Carry-On Size?

The Aeromexico carry-on size is 55 × 40 × 25 cm. The measurement includes the bag’s wheels and handle.

This is the maximum size for a bag intended for the overhead compartment.

Before leaving for the airport, measure your suitcase with the wheels and handles included. Also check the bag when it is packed because an overfilled soft-sided bag can exceed the permitted dimensions.

Aeromexico carry-on size in inches

The maximum size is approximately:

21.5 × 15.7 × 9.8 inches

The centimetre measurement is the safer reference because that is how Aeromexico publishes the cabin-bag limit.

How Much Can an Aeromexico Carry-On Weigh?

The Aeromexico carry-on weight limit depends on the fare, route and market.

For example, Aeromexico’s current Mexico-region information shows:

• Basic: carry-on allowance of up to 10 kg where included
• Classic, AM Plus and Premier: up to 15 kg in the applicable fare information
• On some Aeromexico routes involving the United States, published cabin-baggage conditions differ from Mexico domestic fare rules. Check the allowance shown for your exact itinerary before packing. 

Aeromexico also states that the carry-on and personal item may be subject to a combined weight limit, depending on the fare.

Because the rule is not identical for every itinerary, do not rely on a single weight number for every Aeromexico flight.

The safest approach: check the baggage allowance attached to your reservation before packing.

Does Aeromexico Include a Carry-On?

It depends on the fare and route.

Aeromexico’s fare families can have different cabin-baggage allowances. For example, on domestic flights within Mexico, the Light fare does not include an overhead carry-on and allows passengers to purchase one separately. Other fares can include a carry-on, subject to their applicable weight conditions.

This means you should not assume that the same carry-on allowance applies to Basic, Light, Classic, AM Plus or Premier on every route.

Before packing, check three things:

1. Your fare family
2. Your departure and arrival countries
3. The baggage allowance displayed for your booking

If you need checked luggage as well, compare the total cost before purchasing. Our Aeromexico baggage fees guide explains how baggage allowances and additional-bag charges can vary.

What Is the Aeromexico Personal Item Size?

Aeromexico recommends that a personal item should not exceed 45 × 35 × 20 cm and should fit under the seat in front of you. The airline also recommends a maximum weight of 3 kg for the personal item.

Examples include:

• Small backpack
• Handbag
• Laptop bag
• Briefcase
• Compact personal bag

Do not treat the personal item as a second overhead suitcase. If the item cannot fit under the seat, it may not qualify as a personal item.

What Happens If My Aeromexico Carry-On Is Too Big?

If your carry-on exceeds the permitted dimensions or weight, Aeromexico may require you to check it rather than take it into the cabin.

Additional baggage charges may apply depending on your fare and itinerary.

To avoid problems:

• Measure your bag before leaving home
• Include wheels and handles when measuring
• Check the applicable weight allowance for your fare
• Do not overfill soft-sided bags
• Keep important documents and essential medication in your personal item

If your carry-on has to be checked at the airport, having essential items in your smaller under-seat bag means they remain with you.

For other cabin baggage rules, you can also compare the requirements in our airline carry-on and check-in rules guide.

How Do I Check In Online With Aeromexico?

Aeromexico offers online check-in through its website. You can use your six-digit reservation reference or 13-digit ticket number, together with your last name, to find your booking.

Basic online check-in steps

1. Go to the Aeromexico website.
2. Open the check-in option.
3. Enter your reservation or ticket number.
4. Enter your last name.
5. Follow the instructions to complete check-in.
6. Review your flight information and available options.
7. Obtain your boarding pass.

If you have checked baggage, completing online check-in does not remove the need to take the bag to the appropriate airport counter or baggage facility.

When Does Aeromexico Check-In Open?

For most Aeromexico flights:

• Domestic flights: online check-in opens 48 hours before departure.
• International flights: online check-in opens 24 hours before departure.
• Basic fare on a domestic Mexican route: check-in can open 24 hours before departure rather than 48 hours.

This Basic-fare exception is important because a passenger traveling domestically on a Basic ticket may not be able to check in as early as another passenger on the same airline.

If you are unsure when your check-in window opens, check the conditions attached to your reservation.

Can I Check In Through the Aeromexico App?

Yes. Aeromexico provides digital check-in through its mobile experience, allowing travelers to manage their trip and obtain their boarding pass.

The app can be useful if you want to:

• Complete mobile check-in
• Access your boarding pass
• Review your trip
• Manage eligible booking options
• Check flight information

Complete mobile check-in before leaving for the airport when possible. If you are checking baggage, you will still need to follow the airport’s baggage-drop process.

If you need to make other changes to your trip, check our guide to Aeromexico customer service for available support options.

How Do I Get My Aeromexico Boarding Pass?

After completing online or mobile check-in, you can access your Aeromexico boarding pass digitally.

Depending on your airport and itinerary, you may also be able to obtain a boarding pass at an airport kiosk or check-in counter.

Before leaving home:

• Complete online check-in when eligible
• Save your boarding pass to your phone
• Keep your travel documents accessible
• Make sure your phone has enough battery

If you are checking baggage, remember that having a boarding pass does not mean you can arrive at the airport after the baggage cutoff.

What Is the Aeromexico Check-In Deadline?

There is no single check-in deadline that should be applied to every Aeromexico itinerary.

The final time for check-in and baggage acceptance can depend on the airport, route and travel requirements. Because of this, travelers should check the instructions associated with their specific flight instead of relying on a universal cutoff.

If you have checked baggage, allow additional time at the airport. Aeromexico’s airport and baggage deadlines can vary by itinerary and airport. Check your booking and the departure-airport instructions, and allow additional time if you need to check baggage or complete document verification.

A practical airport rule

If you have a checked bag, do not plan your arrival around your flight’s boarding time. You need enough time to:

1. Reach the airport
2. Check your baggage
3. Complete any required document checks
4. Pass security
5. Reach your gate

Where Do I Drop Checked Baggage After Online Check-In?

If you have already checked in online but have a checked bag, go to the Aeromexico baggage/check-in facility at the airport.

Aeromexico recommends allowing additional time when traveling with checked luggage because baggage processing can take longer than simply arriving with cabin baggage.

Do not assume that online check-in eliminates the baggage-drop deadline.

For a detailed look at checked-bag allowances and additional baggage, see the Aeromexico baggage allowance guide.

What Are the Aeromexico Luggage Rules for Checked Bags?

Checked-baggage allowances depend on the fare and route.

Aeromexico’s current baggage information shows that some Main Cabin fares allow passengers to purchase checked baggage, while certain fare combinations include one or more checked bags. Premier fares can have higher baggage allowances.

Because the included number of bags can change by fare and itinerary, check your reservation before assuming that a checked bag is included.

For current pricing and additional-bag rules, see our Aeromexico baggage fees page rather than relying on a general airport price.

Can I Add Baggage After Booking Aeromexico?

Yes. Aeromexico provides options for passengers who have already booked and need to add baggage.

The available baggage products and prices depend on the route, fare and timing. Aeromexico encourages passengers to purchase additional baggage before the airport when applicable.

If you already have a reservation, check the baggage options associated with your booking before traveling.

What Security Rules Apply to Aeromexico Cabin Baggage?

Cabin baggage must also comply with the security requirements of the airport and country where you are departing.

Common security restrictions include:

• Liquids and gels may be subject to the applicable airport security limits
• Sharp or prohibited objects may not be allowed in cabin baggage
• Spare lithium batteries and power banks generally need to remain in the cabin rather than checked baggage
• Additional restrictions can apply to aerosols, batteries, medicines and special equipment

For flights departing the United States, follow the applicable TSA requirements. For flights departing Mexico, follow the security rules of the relevant airport and authorities.

Aeromexico’s own baggage restrictions should also be checked before packing.

Special Aeromexico Baggage and Check-In Situations

What if I am traveling with an infant?

Infant baggage allowances can depend on the ticket type, route and travel conditions.

If you are traveling with a stroller, car seat or other infant equipment, check the rules attached to your itinerary before going to the airport. Special baggage may have different handling requirements from standard cabin baggage.

What if I have a Basic fare?

Basic fares can have different baggage and check-in conditions from other fare families.

For example, Aeromexico’s current information states that passengers with a Basic fare on a domestic Mexican route can have a 24-hour online check-in window, rather than the standard 48-hour domestic window.

Check both your baggage allowance and check-in timing before your travel date.

What if my flight is operated by another airline?

If your itinerary contains a flight operated by another carrier, baggage and check-in rules can be different for that segment.

Aeromexico provides separate guidance for flights operated by partner airlines, so check the operating carrier’s requirements when your itinerary includes a codeshare or partner-operated flight.

What about wheelchairs and mobility equipment?

Passengers traveling with mobility aids should check Aeromexico’s current special-assistance rules before travel. Wheelchairs and other mobility equipment can have different handling procedures from normal baggage.

Common Aeromexico Carry-On and Check-In Mistakes

1. Assuming every fare includes an overhead carry-on

Aeromexico’s baggage allowance changes by fare and route. For example, Light does not include a carry-on on domestic flights within Mexico.

2. Using one weight limit for every Aeromexico flight

The cabin-baggage weight allowance can vary by fare and market. Check your booking rather than relying on a generic number.

3. Measuring the suitcase without its wheels

The 55 × 40 × 25 cm carry-on limit includes wheels and handles.

4. Treating a large backpack as a personal item

A personal item must fit under the seat. Aeromexico recommends keeping it within 45 × 35 × 20 cm.

5. Assuming domestic and international check-in opens at the same time

The standard online check-in windows are different: 48 hours for domestic flights and 24 hours for international flights, with a Basic domestic exception.

6. Completing online check-in but forgetting baggage drop

Online check-in does not mean your checked bag has been accepted. Leave enough time for the airport baggage process.

How to Make Aeromexico Check-In Easier

A few simple steps can make the airport process smoother:

• Check your fare’s baggage allowance before packing.
• Measure your carry-on to 55 × 40 × 25 cm.
• Keep your personal item within the recommended 45 × 35 × 20 cm.
• Check the applicable cabin-baggage weight for your route.
• Complete online check-in as soon as your booking becomes eligible.
• Save your boarding pass on your phone.
• If you have checked luggage, arrive early enough for baggage drop.
• Check partner-airline rules if another carrier operates part of your itinerary.
• Keep medication, identification and other essential items in your personal item.

If you are also choosing a seat before departure, our Aeromexico seat selection guide explains how seat-related options can affect your trip.

A Simple Example: How the Rules Work

Imagine you are flying domestically within Mexico on an Aeromexico Light fare.

You have a small backpack and a standard cabin suitcase.

Your backpack can serve as your personal item if it fits under the seat. However, Aeromexico’s current baggage information says that Light fares on domestic Mexico flights do not include an overhead carry-on, so the suitcase may need to be purchased as an additional carry-on.

Now consider a passenger traveling on a different fare where the carry-on is included. That passenger can bring the permitted overhead bag, subject to the applicable size and weight limits.

The key point is that the baggage allowance follows the fare and route, not simply the airline name.

Before You Fly Aeromexico: Quick Checklist

Check your baggage

• Confirm your fare family
• Check whether a carry-on is included
• Measure your carry-on: 55 × 40 × 25 cm maximum
• Check that your personal item fits under the seat; Aeromexico recommends keeping it within 45 × 35 × 20 cm. 
• Check the applicable weight allowance
• Review checked-bag allowance if you are carrying luggage in the hold

Check in

• Confirm when online check-in opens
• Remember the Basic domestic check-in exception
• Complete web or mobile check-in when available
• Save your boarding pass

At the airport

• Allow extra time if checking baggage
• Complete baggage drop before the applicable cutoff
• Keep your passport, ID and other travel documents accessible
• Keep essential items in your personal item

For broader airline comparisons, you can also use our airline carry-on and check-in hub.

Key Takeaways

• The Aeromexico carry-on size is 55 × 40 × 25 cm, including wheels and handles.
• Aeromexico recommends a personal item no larger than 45 × 35 × 20 cm and up to 3 kg.
• Carry-on weight allowances vary by fare, route and market; some current Mexico-region rules use a combined 10–15 kg cabin-baggage limit.
• A carry-on is not included in every fare. On domestic flights within Mexico, the Light fare does not include an overhead carry-on.
• Online check-in generally opens 48 hours before domestic departure and 24 hours before international departure.
• Basic fare passengers on domestic Mexican routes may have a 24-hour check-in window.
• Online check-in does not eliminate the need to complete baggage drop if you have checked luggage.
• Partner-operated flights can have different baggage and check-in requirements.
• Always check the allowance and conditions attached to your specific booking before travel.

Frequently Asked Questions (FAQs)

Editorial Information

This guide was reviewed against current Aeromexico information covering cabin baggage, fare conditions, online check-in and airport baggage procedures. Aeromexico’s published rules show that baggage allowances and check-in conditions can differ by fare, route, country, airport and operating carrier, so travelers should verify the rules attached to their specific reservation before departure.

FlyTripInfo is an independent third-party travel information website and is not affiliated with or endorsed by Aeromexico. Airline policies, baggage allowances and check-in requirements may change, so travelers should verify the latest information directly with Aeromexico before travel.