# Connecting Flights: How to Book Smart Layovers and Make Every Connection URL: https://emptvl.vercel.app/travel-guides/connecting-flights-tips Publisher: Empyrean Travel (https://emptvl.vercel.app/) Last reviewed: 2026-10-19 Connecting flight tips: how much layover time you really need, why one ticket matters, how bags and customs work on international connections, and what to do. **Quick answer:** Book connections on a single ticket so the airline is responsible if you misconnect, and give yourself more than the minimum: an hour or more domestically, and two to three hours when you change terminals or clear immigration abroad. Arriving from overseas, you clear US customs at your first US airport and usually recheck your bags before connecting. - Safest booking: One ticket for the whole journey - Domestic buffer: 60–90 minutes is comfortable - International buffer: 2–3 hours with customs or terminal changes - Entering the US: Customs at your first US airport ## How much time do you really need between flights? Every airport sets a minimum connection time, the shortest connection an airline can legally sell. It assumes everything goes right: an on-time arrival, a nearby gate and short lines. It leaves no room for a late inbound flight, a long taxi or a terminal train. As a rule of thumb, a domestic connection of 60 to 90 minutes is comfortable at most US hubs. Allow two to three hours when you must change terminals, clear immigration or customs, or switch airlines. In winter, add margin at hubs prone to snow and thunderstorms, or choose a connection point with better weather. ## Why does booking everything on one ticket matter? When all your flights are on one ticket, the airline is responsible for getting you to your final destination. If the first flight runs late and you miss the second, it rebooks you, and your checked bags follow you through. Partner airlines with interline agreements can do the same across carriers. On separate tickets, the second airline sees only a passenger who didn’t show up. You may lose that ticket and pay for a new one, and you’ll usually have to collect and recheck your bags yourself. Self-transfer itineraries can save money, but build in many hours, not minutes, if you use them. ## What happens with bags and customs on international connections? Flying home from abroad, you clear US immigration and customs at your first US airport, even if you’re connecting onward. You collect your checked bags, take them through customs, then drop them at a recheck belt and go through security again. Global Entry or Mobile Passport Control can cut that time considerably. Some airports abroad, including Dublin, Shannon, Abu Dhabi, Toronto and Vancouver, offer US preclearance: you complete US entry before departure and land in the US as a domestic arrival. In Europe, you usually pass passport control at your first Schengen airport, so a connection in Frankfurt or Paris includes an immigration line. ## How do you make a tight connection? If time is short, every minute counts. A few habits make a real difference. - Choose an aisle seat near the front of the cabin - Travel with carry-on bags only when you can - Check your arrival and departure gates in the airline’s app before landing - Look at the airport map so you know whether you need a train or bus between terminals - Tell a flight attendant about a very tight connection; they sometimes help passengers off first - If you can see you’ll miss it, start rebooking in the app right away ## When is a long layover or stopover worth it? A long layover can be a gift with lounge access; see our airport lounge access guide. On very long journeys, a planned overnight in a hub city can turn a grueling trip into two easy ones. Some airlines even let you add a stop of a few days at no extra airfare. Our guide to stopover programs explains how they work. If you do miss a connection despite your planning, follow our missed connection guide. ## Frequently asked questions **Q: How much time do I need for an international connection?** A: Plan on at least two hours, and three when you must clear immigration, collect and recheck bags, or change terminals. Returning to the US, you clear customs at your first US airport, which takes longer during busy arrival waves. Global Entry or Mobile Passport Control can shorten the process, but don’t book a tight connection counting on it. **Q: Do I have to recheck my bags on a connecting flight?** A: On a single ticket within the US, no; bags are checked through to your final destination. When you arrive in the US from abroad, yes: you collect them at your first US airport, clear customs, then drop them at a recheck belt. On separate tickets, you usually must collect and recheck bags yourself, which takes much longer. **Q: What happens if I miss a connection on separate tickets?** A: You’re usually on your own. The second airline isn’t responsible for a delay on a different ticket, so it may treat you as a no-show, cancel your onward and return flights and require a new ticket. Some offer goodwill help, but don’t count on it. If you must use separate tickets, leave many hours between them and consider travel insurance. **Q: Do I go through customs on a connecting flight to the US?** A: Yes. You clear US immigration and customs at your first point of entry, even if you’re connecting to another US city. The exception is a flight from a preclearance airport, such as Dublin, Shannon, Abu Dhabi, Toronto or Vancouver, where you complete US entry before departure and arrive as a domestic passenger. **Q: What is a legal connection?** A: A legal connection is one that meets the published minimum connection time for that airport and the airlines involved, so it can be sold on one ticket. It’s a minimum, not a recommendation. A 45-minute legal connection may be fine at a small airport but risky at a large hub, especially with a terminal change or a winter weather delay. ## Sources - [CBP: Preclearance locations](https://www.cbp.gov/travel/preclearance) - [CBP: Mobile Passport Control](https://www.cbp.gov/travel/us-citizens/mobile-passport-control)