Transit Visa Guide: When You Need One
Just because you never leave the airport doesn't mean you're safe from visa requirements. Rules for common transit hubs.
Transit rules confuse experienced travellers because there is no single global standard. Some countries let you connect between international flights with no visa. Others require a transit visa even if you never touch the ground.
When you don't need a transit visa
If you stay airside - between security and your next gate - most countries do not require anything beyond a valid onward boarding pass. This applies at Doha, Dubai, Singapore Changi, Bangkok, and Frankfurt for most nationalities.
The Schengen area treats connections between Schengen and non-Schengen flights as border crossings, which means passport control - but not a visa if you don't need one to enter Schengen.
Countries that require transit visas
The United States requires a transit visa (C-1) or ESTA for any transit through US airports. There is no sterile transit - you always clear US immigration and customs even on connections.
Canada requires either a Transit Without Visa authorisation or an eTA depending on your nationality and route. China requires a full visa unless you qualify for 24, 72, or 144 hour visa-free transit at specific airports.
Split tickets and baggage
If your two flights are on separate tickets, you must collect and re-check your bag at the connection point. This means clearing immigration - which means the country's normal entry rules apply, not just transit rules.
For example, connecting through Heathrow between two separate tickets, a US passport holder is fine. On the same journey for a passport holder needing a UK visa, they'd need a UK Visitor in Transit visa.
Frequently asked questions
How do I know if my ticket is one booking?
Same PNR (booking reference) with a single confirmation is one ticket. Two confirmations from different airlines usually means two tickets.
What is TWOV?
Transit Without Visa. Some countries allow it with strict conditions - same-day connection, no leaving airside.
In summary
If you take one thing from this guide, it's this: the more prepared you are before you travel, the fewer decisions you have to make when you're tired and jet-lagged. Bookmark this page and check the update date before your next trip.
Keep reading
Entry Requirements for Europe: Schengen, ETIAS, and UK
The 90/180 rule, the new ETIAS scheme, and the UK's own ETA. What visitors from the US, Canada, and Australia need in 2025.
Read guide →
Lost Passport Abroad: Step by Step
What to do in the first hour, first day, and until you have a replacement in hand.
Read guide →
Connecting Flights Explained
Same terminal, different terminal, different airport. What actually happens between your first and second flight.
Read guide →Newsletter
The weekly travel briefing
One short email each Sunday. Practical guides, rule changes, and answers to the questions travellers are asking this week. No spam, unsubscribe any time.