What Is a Transit Visa? C-1, C-2, and C-3 Explained

The Short Answer

A U.S. transit visa — technically a C visa — is a nonimmigrant visa that allows a foreign national to pass through the United States on their way to another country. Unlike a B-1/B-2 visitor visa, a transit visa is not for tourism, business meetings, medical treatment, or visiting family. Its entire purpose is continuous and immediate transit, and the C visa has strict rules about how long you can stay and what you can do while you are in the country.

If you are flying from São Paulo to Tokyo with a layover at Los Angeles International Airport, or boarding a cruise in Miami after arriving from another country, you may need a transit visa unless you qualify for the Visa Waiver Program or an exemption.

The Three C Visa Categories

The C visa is actually three separate subcategories, each with its own purpose:

• C-1 — Immediate and continuous transit through the United States. This is the standard transit visa for foreign nationals passing through a U.S. airport or port on the way elsewhere.
• C-2 — Transit to the United Nations Headquarters District in New York under Section 11 of the Headquarters Agreement. C-2 holders may travel only between the port of entry and the U.N. headquarters area.
• C-3 — Transit for foreign government officials, their immediate family, attendants, servants, and personal employees, traveling through the U.S. in transit to another country on official business.

Most ordinary travelers need C-1 if they need a transit visa at all. C-2 and C-3 apply only to very specific categories of government-related travel.

Do You Actually Need One?

The United States does not offer an "airside transit" category like some countries do. If your flight lands in the U.S. — even if you are only changing planes at the same airport — you are considered to have entered the country and you need lawful status to do so. That usually means one of three things:

1. You qualify for the Visa Waiver Program (VWP) — citizens of participating countries can travel to the U.S. (including transit) with an approved ESTA instead of a visa.
2. You already hold another valid visa — a B-1/B-2 visitor visa, a student visa, an employment visa, or any other category that permits entry can also be used for transit.
3. You apply for a C-1 transit visa — this is the fallback if you are not eligible for the VWP and do not hold another visa.

A common misconception is that "airside transit" exists in the U.S. It does not. There are no sterile international zones in U.S. airports where non-citizens can wait for a connecting flight without clearing immigration. Every arriving passenger must clear U.S. Customs and Border Protection and be admitted under a visa or visa-free category.

How Long Can You Stay on a C Visa?

The C-1 transit visa is strictly for continuous and immediate transit. U.S. Customs and Border Protection typically admits C-1 holders for a period not exceeding 29 days — just enough to complete the transit through the U.S. You cannot extend a C-1, you cannot change status from C-1 to another category inside the U.S. (with narrow exceptions), and you cannot use a C-1 to work, study, or remain beyond your transit purpose.

The very short duration reflects the whole point of the visa: you are not a visitor; you are a passer-through.

How to Apply for a C-1 Transit Visa

The application process is similar to other nonimmigrant visas:

1. Complete the DS-160 online at ceac.state.gov. This is the standard nonimmigrant visa application form.
2. Pay the application fee. Fee amounts are set by the U.S. Department of State and published at travel.state.gov. Always check current fees before paying.
3. Schedule a visa interview at the U.S. embassy or consulate with jurisdiction over your residence. C visa interviews follow the same protocol as other nonimmigrant visa interviews.
4. Bring evidence of onward travel — this is critical. Consular officers want to see that your transit through the U.S. is genuinely continuous, with a confirmed ticket to your final destination and proof that you have the right to enter that destination country.
5. Bring evidence of ties to your home country — the same nonimmigrant intent rules apply. You must show you will leave the U.S. after your transit.

The consular officer has discretion to approve or deny a C-1 application based on the applicant's overall credibility, the reasonableness of their travel plans, and any concerns about possible overstay.

C-1/D Crew Visas and Other Variations

A related visa is the C-1/D, a combined transit and crew visa used by crew members of airlines, ships, and cruise lines. Sea and air crew members entering the U.S. to work on vessels or aircraft typically hold C-1/D visas, which allow them to enter the U.S. as part of their transit to or from the vessel. C-1/D is not the same as a pure transit visa for an ordinary traveler.

Common Mistakes and Misunderstandings

Travelers frequently run into trouble with transit visas in predictable ways. One is assuming that a short connection at a U.S. airport does not require immigration clearance — it does. Another is assuming the C-1 can be used to attend a brief meeting or sightsee during a long layover — it cannot. A third is applying for a C-1 when a B-1/B-2 visitor visa would be more useful, since the B visa covers transit and would also allow short tourist or business activity during the layover.

If there is any chance you might want to leave the airport for tourism or a meeting during your transit, a B-1/B-2 is usually the better choice — if you qualify for it and the consular officer agrees.

The Bottom Line

A U.S. transit visa exists for one purpose: continuous and immediate transit through the United States on the way to another country. Most travelers will either qualify for the Visa Waiver Program, already hold another valid U.S. visa, or — in a minority of cases — need to apply for a C-1 at a U.S. embassy or consulate. There is no "airside transit" in the United States, so every arriving passenger must clear immigration and hold lawful status to do so.

Before booking a flight with a U.S. layover, check travel.state.gov to confirm whether your nationality requires a transit visa or can use the Visa Waiver Program. Apply early if a visa is required — interview wait times at U.S. consulates vary widely by country.

When to Work with an Immigration Attorney

Not every immigration question needs a lawyer, but some do. The topics covered in this article include situations where a brief consultation with a licensed U.S. immigration attorney can save months of delay, prevent irreversible mistakes, and identify options you might not otherwise know about. Consider consulting an attorney if your case involves any of the following:

• Criminal history of any kind. Even dismissed charges, expunged records, or decades-old offenses can affect immigration outcomes. The immigration consequences of a criminal record are technical and fact-specific, and plea deals that seemed favorable in criminal court sometimes have devastating immigration consequences.
• Past immigration violations or denials. Prior visa denials, overstays, periods of unlawful presence, and prior removal proceedings all affect current options. An attorney can review your history and identify which paths remain open.
• Complicated family situations. Divorce, death of a petitioner, domestic abuse, and similar circumstances can trigger waiver eligibility or affect existing petitions in ways that require careful legal analysis.
• Business immigration matters. Employment-based cases, investor visas, and self-petitions are typically too complex for do-it-yourself filing. The evidentiary standards are demanding and the stakes are high.
• Cases that feel stuck. If your case has been sitting without action for a long time, or if you received an RFE or NOID you do not fully understand, an attorney can diagnose the problem and respond effectively.
• Anything you do not fully understand. Immigration forms are technical, and a small mistake can cascade into large consequences. When in doubt, ask someone qualified.

Finding Reliable Information

The single most reliable source of current U.S. immigration information is USCIS itself. USCIS publishes form instructions, fee schedules, processing times, policy manuals, and policy alerts at uscis.gov. When any article (including this one) references specific fees, processing times, or eligibility rules, the information can become outdated as USCIS updates its policies and fee schedules. Always verify any time-sensitive detail directly with USCIS before filing anything.

Other reliable primary sources include the U.S. Department of State (for visa bulletins and consular processing), the U.S. Department of Labor (for PERM and prevailing wage information), U.S. Customs and Border Protection (for admission and port of entry rules), and the Executive Office for Immigration Review (for immigration court procedures).

Secondary sources — including practitioner guides, law school immigration clinics, and reputable nonprofit legal aid organizations — can provide helpful explanations of how the rules apply in practice. Community forums and social media should be treated with caution: they can point you to useful resources, but they also contain a great deal of inaccurate or outdated information, and the rules change frequently enough that what was true a year ago may not be true now.

Keeping Records

One of the simplest ways to protect yourself through any immigration process is to keep careful records of everything. Copies of every filing you send to USCIS, every notice you receive, every check or money order you submit, and every piece of correspondence you send or receive become critical evidence if something goes wrong later. Keep these records organized, dated, and backed up in at least two separate places (for example, a physical folder and a digital scan).

Also keep records of everything that supports your underlying eligibility — tax returns, marriage certificate, birth certificates, medical records, employment records, property records, school transcripts, and anything else that demonstrates ties to the United States, family relationships, or program eligibility. Good records are the backbone of a strong immigration case.