
Using your passport at the airport is a standard procedure, but it can be confusing, especially for those with dual citizenship. Most countries require you to present your passport at several points during the airport journey, including check-in, security, boarding, and customs. In some cases, you may be able to use a state-issued driver's license or ID, but this must be REAL ID-compliant from May 7, 2025, onwards. For US citizens, the Mobile Passport Control (MPC) app can speed up the process by allowing you to submit travel details and answer inspection questions ahead of time. Global Entry is another option that allows for faster processing, but it comes with a fee.
How to use a passport at the airport
| Characteristics | Values |
|---|---|
| Identification | A passport is a valid form of ID for travelers at airport security checkpoints. |
| Mobile Passport Control (MPC) | A free app that speeds up the interaction with the CBP Officer. It is available at 35 U.S. international airports. |
| Global Entry | Requires an online application, a $100 application fee, a background check, and an in-person interview. It is the fastest method to clear passport check. |
| Dual Citizenship | When traveling between the U.S. and Europe, use the U.S. passport when entering or exiting the U.S. and the EU passport when entering or exiting Europe. |
| REAL ID | Starting May 7, 2025, a state-issued driver's license or ID that is not REAL ID-compliant will not be accepted as a valid form of identification at airports. |
| Children | Children under 18 traveling within the U.S. do not need to provide identification. |
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What You'll Learn

Identification requirements for children
If you are an adult over the age of 18, you need a valid government form of ID to board a plane in the U.S. If you are flying internationally, you will need to present your passport at check-in, the TSA security checkpoint, and when you arrive at your destination.
Children under the age of 18 do not need to provide identification when travelling within the United States. However, children ages 15 to 17 may be required to provide some form of identification, preferably a photo ID. If your child is travelling alone, it is best to provide them with some sort of ID, preferably with their photo on it. If your child is travelling with only one parent or guardian, a notarized parental consent form signed by both parents and a copy of the non-travelling parent's passport or valid identification will be required. In the case of a deceased parent, the living parent or guardian must sign the consent form and attach a copy of the late spouse's death certificate. The only exception is if the parent has proof of sole custody, in which case a copy of the custody agreement signed by both parents must be presented.
If your child already has a passport, it is recommended to send them with a copy of it in case of an emergency. Even if your child is only a month old, they will need a passport to leave the country. For international travel, your child will also need to apply for a travel visa, if required by your destination country.
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Using the Mobile Passport Control app
The Mobile Passport Control (MPC) app is a free, official application created by U.S. Customs and Border Protection (CBP) to streamline the CBP inspection process at select U.S. entry locations. It is available at 33 U.S. airports, 9 preclearance locations, and 4 cruise ports around the country.
To use the app, you must first download it from the Apple App Store or Google Play. Then, set up a profile with your passport data, including your name, gender, date of birth, and country of citizenship. You can also add your passport information, which will be saved in the app for future use. You can also add your Known Traveler Number (KTN) if you have one.
Upon landing in the United States, select your arrival airport or seaport and terminal, take a self-photo, and answer a series of CBP inspection-related questions. You can submit your travel details either from your mode of transport or upon arrival at a port of entry, such as the airport. Once you have submitted your transaction through the app, you will receive an electronic receipt with an encrypted Quick Response (QR) code.
Finally, bring your physical passport and mobile device with your digital QR-coded receipt to a CBP officer to finalize your inspection for entry into the United States. It is important to note that MPC does not replace your passport, and you will still need to show your physical passport to the CBP officer.
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Which passport to use when travelling with dual citizenship
If you have dual citizenship, you will hold multiple passports, each tied to a specific country of citizenship. The passport you use when travelling will depend on your destination and the regulations of the countries you are a citizen of.
Some countries require their citizens to enter and exit using that country's passport. For example, all US citizens must use a valid US passport to enter and depart the United States, regardless of whether they hold dual citizenship. In this case, you would use your US passport when booking your ticket and presenting it at passport control. For the return journey, you would simply do the same in reverse, using your other passport to exit the country and enter the US.
If you are travelling to a country where you are not a citizen, you may use whichever passport you prefer, as long as you meet the visa requirements for entry. For example, if you are a US citizen travelling to a country that requires a visa for US citizens but not for citizens of your other country of citizenship, you may choose to enter using the passport of that country. In this case, you would book your ticket with that passport and present it at passport control.
It is important to note that you are generally not required to disclose your dual citizenship unless asked. However, you should always have both passports in your possession when travelling and be prepared to present them to border officials if requested. Additionally, using separate passports can shield your travel history from unwarranted inspection and prevent the country you are leaving from knowing your future travel plans.
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REAL ID compliance for US domestic flights
When travelling by air, you will need to show some form of identification to get through airport security and board your flight. The identification required depends on where you are travelling and your nationality. Here is some information on REAL ID compliance for US domestic flights.
From May 7, 2025, all US travellers must be REAL ID-compliant to board a domestic flight or access certain federal facilities. A REAL ID-compliant driver's license or ID can be obtained through your state DMV. If you are unsure if your ID complies with REAL ID, you should check with your state department of motor vehicles.
If you do not have a REAL ID, you can use another acceptable form of identification, such as a passport, to board a domestic flight. Other acceptable forms of ID include a state-issued Enhanced Driver's License (EDL), DHS trusted traveler cards (Global Entry, NEXUS, SENTRI, FAST), and a US Department of Defense ID.
If you do not have an acceptable form of ID, you may face delays, additional screening, or not being allowed through the security checkpoint. If you are allowed through without an acceptable ID, you will be subject to additional screening. TSA PreCheck passengers will also be subject to additional screening if they do not have an acceptable form of ID.
Children under 18 travelling within the US do not need to provide identification.
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Global Entry vs Mobile Passport Control
Global Entry and Mobile Passport Control (MPC) are two programs that aim to make it easier to get through customs and passport control at the airport. Here is a comparison of the two programs:
Global Entry
Global Entry is a US government program run by the US Customs and Border Protection (CBP) agency. It is designed for low-risk, frequent international travelers and carries a $100-$120 application fee for a five-year membership. The application process includes a lengthy form, a federal background check, fingerprinting, and an interview. Global Entry participants can skip long passport control lines by using dedicated kiosks, which are available at over 60 airports in the US and select international locations. This eliminates paperwork, reduces wait times, and offers a smooth, nearly line-free experience. Global Entry also includes TSA PreCheck benefits, such as access to dedicated security lanes and no need to remove shoes at TSA screening. The application process can be time-consuming and may not be completed in time for an upcoming trip.
Mobile Passport Control (MPC)
MPC is a free mobile app run by the US Customs and Border Protection agency. It is ideal for occasional international travellers, especially those travelling in large groups with non-Global Entry members, and those who need a quick option with minimal prior work. Users complete customs declaration documents on the app after arriving at the entry point, and the information is stored in a QR code that is scanned upon arrival. MPC is available at over 50 sites, including major US hubs and several international airports, and the list of participating airports continues to grow. MPC users can skip the long lines at customs, and there is usually a dedicated line at most airports that is just as fast as Global Entry.
In conclusion, both Global Entry and Mobile Passport Control offer significant benefits for travellers. Global Entry may be more suitable for frequent international travellers who have ample notice of an upcoming trip, while MPC is a good option for those who travel infrequently or need a quick solution with minimal prior work.
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Frequently asked questions
The Mobile Passport Control app by U.S. Customs and Border Protection is a free, easy, and fast solution to ease long waits at passport control when returning from an overseas trip. It puts you in line with diplomats and airline crew and can speed up your wait at border control to just a few minutes.
The app can be downloaded from the Apple App Store or Google Play. You will be asked to create a profile with your passport information. When you land in the United States, you’ll select your arrival airport, take a selfie using the app, and answer a short series of inspection questions.
TSA does not require children under 18 to provide identification when travelling within the United States. Contact the airline for questions regarding specific ID requirements for travellers under 18.











































