Last reviewed September 6, 2026
Overview: A C transit visa is for qualifying travel through the United States on the way to another destination. C-1 is the ordinary transit category. A connection through a U.S. airport can require U.S. admission documents even without plans to leave the airport.
The transit classifications
- C-1: immediate and continuous transit to another country.
- C-2: travel connected with the United Nations headquarters district under the applicable headquarters arrangements, with special geographic restrictions.
- C-3: qualifying foreign-government officials and accompanying persons transiting on official business.
- C-1/D: commonly used when traveling to join a ship or aircraft as crew.
Someone with a valid visitor visa may be able to use it for transit. Eligible VWP travelers may transit with ESTA, and some nationalities have separate visa exemptions. Whether a new C-1 visa is required depends on the traveler’s existing documents and eligibility.
What ordinary transit means
The U.S. stop must be part of the onward journey. An unavoidable connection or waiting for the next practical departure may fit. Planning several days of tourism as a separate purpose calls for a visitor route instead.
For example, flying from one foreign country to another with a connection in Houston is a transit scenario. Adding a week in New York to sightsee changes the purpose of the U.S. stay.
Eligibility and documents
Application documents include a passport, DS-160 confirmation, photograph and required payment receipt. Evidence explains the complete route: reservations or itinerary, permission to enter the destination where required, funds to complete the journey and the reason for the connection.
Official or UN travel involves mission or organization documentation and a supporting note. Those classifications have requirements beyond an ordinary air ticket. For C-1/D, the employer’s letter identifies the vessel or aircraft and the joining location.
The application process, step by step
- An existing visa, VWP eligibility or nationality exemption may already provide a qualifying basis for transit.
- When a visa is required, consular processing includes DS-160 under the post’s instructions.
- Appointment and fee requirements apply. Official categories can have different fee or interview treatment.
- Onward-travel evidence explains the stopover. Additional documents may be requested.
- An issued visa records its classification and validity. The airline checks boarding documents; CBP makes the admission decision.
- Transit and departure must occur within the period and conditions granted.
Stay limits and restrictions
Ordinary C-1 admission is for the time needed for immediate transit, up to 29 days. That is a ceiling, not a 29-day holiday allowance. C-2 and C-3 have their own conditions rather than automatically sharing every C-1 rule.
Transit status is not an ordinary route for extending a stay, starting a U.S. job or enrolling in school. Changes of status are restricted, and C-2 has specific treatment in the regulations.
Family, cost and disruption
Each traveler needs the documentation appropriate to their nationality and purpose. An accompanying person’s eligibility does not follow automatically from another person’s C-1 approval.
Costs can include the applicable visa fee and appointment arrangements. Transit visas may still require interviews and administrative processing; a close flight date does not guarantee faster issuance.
A flight or vessel cancellation does not automatically extend the admission period. Carrier notices document the disruption, while CBP administers admission-related procedures. The effect of a delayed departure depends on the classification and circumstances.