Check whether airlines are likely to allow you to board based on visa rules, passport validity, transit requirements, and onward ticket policies.
Based on global visa rules, passport validity policies, and airline boarding requirements.
Airlines are legally responsible for passengers they transport. If you arrive at a destination without the right to enter, the airline that carried you must fly you back at its own expense and may face a fine. To avoid this, airlines use systems like IATA Timatic — a real-time database of entry requirements — to verify your passport, visa, and travel documents at check-in and again at the gate. The four checks this tool simulates are the most frequently flagged: destination visa authorization, passport validity, transit visas, and onward ticket proof.
Connecting through a country does not mean you bypass its immigration rules. Many transit hubs — including the United Kingdom, Schengen Area airports, and Canada — require certain passport holders to hold a transit visa even if they never plan to leave the sterile airside area. These are called Airside Transit Visas (ATV) or Direct Airside Transit Visas (DATV). Failure to hold one can result in denied boarding at the departure airport before you even start your journey. Indian, Pakistani, Bangladeshi, and many African passport holders are commonly affected by transit visa requirements in Europe and North America.
Most countries do not simply require your passport to be valid on arrival — they require it to remain valid for a defined period beyond your stay. The two most common rules are: six months of validity beyond your arrival date (enforced by most of Southeast Asia, the Middle East, and parts of Africa) and three months beyond your planned departure date from the Schengen Zone (enforced by all 29 Schengen member states). Even if immigration allows you through on a technicality, airline check-in systems flag passports that fail these rules and agents are trained to deny boarding. A passport expiring in four months may get you into the US but will be flagged by your airline flying to Thailand.
Visa-free entry does not mean unconditional entry. Countries like the United States, United Kingdom, Thailand, and the Philippines use onward ticket requirements as a secondary check — you must show that you have a plan to leave the country within your authorized stay. This is enforced both by immigration officers and by airlines before boarding. The United States CBP, for instance, can turn away travelers who cannot demonstrate onward intent, even holders of passports that normally enjoy visa-free access under the Visa Waiver Program. One-way travelers heading to countries that strongly enforce this rule should have a documented outbound plan or a confirmed flexible booking before arriving at the airport.
The Airline Boarding Check tool evaluates four rule layers that determine whether a traveler is likely to be permitted to board their flight: the destination visa requirement for their passport nationality, passport validity against the destination country's minimum rule, any transit visa requirements at connection points, and the onward or return ticket enforcement level at the destination.
Results are classified as Likely OK, Caution, or Likely Issue. Caution results indicate that a condition requires your attention but may not be a hard blocker — for example, an eVisa that needs to be applied for, or an onward ticket that is commonly but not always checked. Likely Issue results indicate a likely boarding denial based on known rules.
This tool was designed to give travelers an honest pre-flight assessment, not marketing copy. Where data is missing, the tool says so rather than making up an answer. We update rule coverage on an ongoing basis. For full visa requirement details, visit our visa guides or individual passport pages.
