What happens if I miss my connection on a single ticket?

The airline rebooks you on the next available flight at no charge. You're protected. This is why booking through one airline or alliance is safer than separate tickets.

Can I leave the airport during a long layover?

Usually yes if your layover is 4+ hours, but check visa requirements and factor in 60-90 minutes each way for security. Dubai, Singapore, Seoul, and Tokyo make this easy. US connections are harder because you clear customs immediately.

Do I need to collect my bags on a connection?

On a single ticket, bags usually transfer automatically to your final destination. Exception: US-bound international flights — you collect bags at your first US airport, then recheck them. On separate tickets, you almost always collect and recheck bags.

Which airports are known for tight connections?

Fast: Singapore, Munich, Copenhagen, Amsterdam, Vancouver. Slow: London Heathrow, Paris CDG, New York JFK, Los Angeles, Miami, Frankfurt. Plan accordingly.

Should I book the shortest legal connection to save time?

No. Airlines sell minimum legal connections, but 30-40% of flights run late. A 45-minute domestic connection works until it doesn't. Build buffer time. Your trip is worth more than 90 minutes.

Minimum Connection Times at Major Airports

Minimum connection time (MCT) is the shortest legal time airlines allow between connecting flights. Most international connections need 60-120 minutes, but this is often too tight. Build in 2-3 hours for international connections and 90 minutes for domestic when booking separately.

Understand what MCT actually means. MCT is the minimum time an airline will sell you a connection, not the comfortable time you need. If you book through one airline or alliance, they guarantee the connection — if you miss it, they rebook you. If you book separate tickets, you're on your own.
Know the standard MCTs by connection type. Domestic to domestic in the US: 30-45 minutes. International to domestic: 60-90 minutes. International to international: 60-120 minutes. These are legal minimums. Comfortable minimums are 60 minutes domestic, 90 minutes international-to-domestic, 2-3 hours international-to-international.
Factor in the airport. Large hub airports need more time. Atlanta, London Heathrow, Paris CDG, Dubai — add 30 minutes to any standard MCT. Smaller airports like Copenhagen or Vancouver can be much faster. Check if you need to change terminals or go through security again.
Check if you clear customs at your connection. US-bound international flights clear customs at your first US airport, not your final destination. If you connect in the US on an international ticket, add 60-90 minutes for customs and immigration. Canadian connections through Toronto or Vancouver work the same way.
Build in buffer time for separate tickets. If you book two separate tickets (common with budget airlines), the airlines owe you nothing if you miss the connection. Use 3-4 hours minimum for international connections on separate tickets. Check if you need to collect and recheck bags.
Look up the specific airport's published MCTs. Airlines publish MCT charts by airport. Google "[airport code] minimum connection time" or check the airport's official website. These tell you what the airline will sell, not what's comfortable.

What happens if I miss my connection on a single ticket?: The airline rebooks you on the next available flight at no charge. You're protected. This is why booking through one airline or alliance is safer than separate tickets.
Can I leave the airport during a long layover?: Usually yes if your layover is 4+ hours, but check visa requirements and factor in 60-90 minutes each way for security. Dubai, Singapore, Seoul, and Tokyo make this easy. US connections are harder because you clear customs immediately.
Do I need to collect my bags on a connection?: On a single ticket, bags usually transfer automatically to your final destination. Exception: US-bound international flights — you collect bags at your first US airport, then recheck them. On separate tickets, you almost always collect and recheck bags.
Which airports are known for tight connections?: Fast: Singapore, Munich, Copenhagen, Amsterdam, Vancouver. Slow: London Heathrow, Paris CDG, New York JFK, Los Angeles, Miami, Frankfurt. Plan accordingly.
Should I book the shortest legal connection to save time?: No. Airlines sell minimum legal connections, but 30-40% of flights run late. A 45-minute domestic connection works until it doesn't. Build buffer time. Your trip is worth more than 90 minutes.