Connecting Flights Explained
Same terminal, different terminal, different airport. What actually happens between your first and second flight.
The word connection covers everything from walking two gates over to changing airports. The right preparation depends on knowing which type you're facing.
Same terminal, airside
The easiest kind. Off your first flight, through the transit signs, to your next gate. No re-check of bags, no re-security in most cases.
Common at Doha, Singapore Changi, Dubai, and most European hubs. Walking time can still be 30+ minutes at big terminals - check gate signs immediately.
Different terminals
Airports like Heathrow, JFK, and Frankfurt spread connections across multiple terminals. Transit buses or trains handle the shuffle but add 20 to 45 minutes.
In some cases, changing terminals requires clearing security again. Read your boarding pass carefully.
Different airports
London (Heathrow to Gatwick), Tokyo (Narita to Haneda), New York (JFK to LGA) - if you booked this on separate tickets, you own the risk.
Allow at least 4 to 5 hours in London or Tokyo for a same-day transfer. Most travellers underestimate this.
Immigration on connections
In the US, all connections require clearing immigration and customs at your first US airport - even if you're transiting to another country. Add 90 minutes at busy airports.
Most other hubs offer sterile international-to-international transit without immigration clearance.
Frequently asked questions
Do bags transfer automatically?
On a single ticket, almost always yes. On separate tickets, never - collect and re-check.
How long is a safe connection?
For international connections, 90 to 120 minutes minimum on one ticket, 4+ hours on separate tickets.
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
Missed Connection Guide
Your first flight is late. You already know you'll miss the second. What to do while still in the air.
Read guide →
Airport Immigration Process
Passport control, biometrics, and the questions officers actually ask. What to have ready.
Read guide →
Multi-city Flight Planning Done Right
When to book a proper multi-city ticket, when to buy separate flights, and how to avoid ruining your itinerary with tight connections.
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.