Carry-On Rules for International Flights 2026

How International Carry-On Rules Differ from US Domestic Rules

Carry-on rules on US domestic flights are relatively forgiving: most major US carriers allow bags up to 22x14x9 inches with no weight limit, and enforcement at the gate is often inconsistent.

International flights are a different environment. Airlines on international routes — particularly European, Asian, and Middle Eastern carriers — apply stricter size limits, enforce weight restrictions that US carriers ignore, and operate in airports with different security procedures. Getting these rules wrong can mean paying unexpected baggage fees, having your bag checked at the gate, or facing delays at security.

This guide covers what you need to know about carry-on rules for international travel in 2026.

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International Carry-On Size Limits by Region

European Airlines

Most major European airlines set their carry-on limit at 55x40x20 cm (approximately 21.7x15.7x7.9 inches). This is noticeably smaller in depth than the US standard of 22x14x9 inches (56x36x23 cm).

Budget European carriers are even stricter. Ryanair's carry-on with overhead bin access is 55x40x20 cm, while easyJet allows 56x45x25 cm. The variation between carriers means a bag that fits on one European airline may not fit on another.

Some carriers enforce the stricter 55x35x20 cm limit. Always check the specific airline's policy page, not just a general "European carry-on size" reference.

Key European carriers and approximate limits:

• Lufthansa: 55x40x23 cm, 8 kg
• Air France: 55x35x25 cm, 12 kg
• British Airways: 56x45x25 cm, 23 kg per item; personal item 40×30×15 cm
• easyJet: 45×36×20 cm small bag included; a 56×45×25 cm large bag needs the applicable booking entitlement
• Ryanair: 55x40x20 cm, 10 kg — overhead bin only with Priority

Check the operating airline

A suitcase label or a generic regional size is not a booking entitlement. Compare the packed bag with the current operating airline’s limits for the class and fare.

Asian Carriers

Check each operating airline’s size, piece and weight rules:

ANA and JAL allow one main bag plus one personal item sharing 10 kg in all cabins. Main bag: 55×40×25 cm AND 115 cm total, including wheels and handles. On domestic aircraft below 100 seats: 45×35×20 cm / 100 cm total. ANA personal item: 40×30×20 cm; JAL requires underseat fit without a published numeric box.

• Singapore Airlines: one main bag in Economy/Premium Economy, two in Business/First; each 7 kg and 115 cm total. Listed personal item 40×30×10 cm.
• Cathay Pacific: 56×36×23 cm main bag and 40×30×15 cm small item share 7 kg in Economy/Premium Economy, 10 kg Business or 15 kg First; membership and Hong Kong/New Zealand exceptions apply.
• Korean Air: Economy/Premium main and personal item share 10 kg; First/Prestige two pieces share 18 kg. Main bag 115 cm total OR 55×40×20 cm; Economy/Premium personal item 40×30×15 cm.

The weight limits on Asian carriers are enforced. A carry-on that passes a size check can still be checked at the gate if it exceeds the weight limit. Pack lightweight gear when flying Asian carriers.

Gulf Carriers

Gulf carriers have separate policies. Qatar normally publishes 50×37×25 cm and 7 kg in Economy; use the operating carrier’s rule rather than a regional assumption.

• Emirates: 55×38×22 cm, 7 kg Economy
• Qatar Airways: 50x37x25 cm, 7 kg Economy
• Etihad: 56x36x23 cm, 7 kg Economy

Gulf carriers actively weigh bags at check-in and increasingly at the gate. If you're connecting through Dubai, Doha, or Abu Dhabi, expect weight enforcement even if your departing airport didn't check.

US Carriers on International Flights

US carriers (Delta, United, American, Alaska, JetBlue) apply the same size limits on international flights as domestic: typically 22x14x9 inches (56x36x23 cm) with no weight limit. This makes US carriers among the most permissive for international carry-on travelers.

However, if you connect to a foreign carrier at any point in your itinerary, their rules apply for those segments. A 22x14x9-inch bag that clears United with no issue may be rejected on your onward Lufthansa connection.

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Liquid Rules by Region

The global baseline for liquids in carry-on bags follows the ICAO standard: containers must be 100 ml or less, all containers must fit in a single transparent, resealable bag of 1 liter or less, and the bag must be presented separately at the security checkpoint.

United States (TSA)

• Containers: 3.4 oz (100 ml) or less per item
• Bag: 1 quart (approximately 1 liter) resealable zip-lock bag
• One bag per passenger
• Bag must be removed from carry-on and placed in the bin separately

TSA PreCheck passengers do not need to remove liquids from their bag in the PreCheck lane.

European Union

• Containers: 100 ml or less
• Bag: 1 liter resealable transparent bag (slightly larger than a US quart)
• One bag per passenger
• Must be presented at the security checkpoint

United Kingdom

Post-Brexit, UK airports follow the same 100 ml / 1-liter bag rule as the EU. Some UK airports have piloted accepting 2-liter bags for liquids purchased airside (after security), but the rules for liquids from home remain the same: 100 ml containers, 1-liter bag.

Australia

• Containers: 100 ml or less
• Bag: 1 liter resealable transparent bag
• One bag per passenger

Japan, Singapore, and Most of Asia

These countries follow the ICAO 100 ml standard. Presentation requirements are similar to the EU — separate the bag from your carry-on at the checkpoint.

Practical Tips for Liquids on International Trips

Pack full-size toiletries in your checked bag or ship them ahead. For a long-haul trip, 100 ml of shampoo, conditioner, moisturizer, and toothpaste will not last a week. Solid alternatives (shampoo bars, solid deodorant, toothpaste tablets) bypass liquid restrictions entirely.

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Items That Vary by Country

Lithium Batteries

IATA rules limit lithium batteries to carry-on bags — they cannot go in checked luggage. Power banks, spare camera batteries, and laptop batteries must travel in the cabin. Individual limits apply (typically 100 Wh per battery, with up to 160 Wh batteries allowed with airline approval). Some countries enforce these rules more strictly than others.

E-Cigarettes and Vaping Devices

E-cigarettes and vaping devices must travel in the cabin (not checked bags) under IATA rules. Refill liquids are subject to the standard 100 ml liquid rule. Note that some destinations (Thailand, Singapore, and others) ban e-cigarettes entirely — carrying them through these countries, even in transit, can result in confiscation or fines.

Certain Foods

Fresh fruits, vegetables, meats, and plant products are subject to customs rules at your destination, not security rules. Security cares about liquids and prohibited items, not food in general. However, customs officers at your destination may confiscate food that violates import restrictions. Check the customs rules for your destination, particularly for travel to Australia, New Zealand, and the United States.

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Tips for Long-Haul Carry-On Travel

Use Compression Packing Cubes

Compression cubes let you squeeze air out of clothing and reduce volume by 30–40%. They also organize your bag so you can access items without unpacking everything. For a 2-week trip in a carry-on, compression cubes are near-essential.

Store Valuables in Your Personal Item

Your carry-on may be gate-checked on full flights, especially connecting legs. Keep your laptop, camera, medication, and travel documents in your personal item (underseat bag), which is almost never taken from you.

Keep Medications in Original Packaging

For international travel, keep prescription medications in their original labeled containers. Some countries require a doctor's note for certain medications, particularly controlled substances. A prescription or letter from your doctor (on clinic letterhead) can prevent complications at customs.

Distribute Weight Across Both Bags

If your airline enforces a 7 kg carry-on weight limit, use your personal item to carry heavier items that are still reasonably sized — a camera, dense shoes, or a laptop. Many airlines that enforce carry-on weight limits do not separately weigh your personal item.

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Connecting Flights: Pack to the Stricter Standard

A common and expensive mistake: your outbound flight is on a US carrier with a 22x14x9 inch limit, but your connecting international carrier allows only 55x40x20 cm. Your bag clears the first leg; the second airline measures it and forces a gate check.

When your trip involves multiple carriers, identify the stricter carry-on size limit across all segments and pack to that limit. For most international trips from the US, the limiting factor will be the European or Asian carrier leg. Carrying a bag that fits within 55x40x20 cm (or 55x35x25 cm for stricter carriers) will work across nearly all international routes.