Flights with a layover: how connections work, step by step
· Vol Spot
Flying out of Quebec City, the layover is part of a traveller's life: most far-off destinations route through Montreal, Toronto or an American or European hub. A well-chosen connection is a simple pit stop; a badly chosen one can ruin the start of a trip. We see these itineraries every day, and the same mistakes keep coming up. Here is what actually happens during a layover, then how to pick an itinerary that holds up.
How a layover works, step by step
On a single ticket, most layovers come down to changing gates. Here is what happens, in order.
- Getting off the plane : Follow the Connections or Transfers signs, not the exit or the baggage carousels. The screens show the gate for your second flight; it can change, so check it again once you get there.
- Checked bags : On a single ticket, they go through to your final destination. The tag put on at the counter shows the arrival airport code: check it before you leave the counter. The common exception is your first US airport when arriving from overseas: you collect your bags for customs, then drop them off again at the connections counter a few steps further on. Coming home to Canada, depending on the airport and the airline, you sometimes have to do the same after customs.
- Boarding passes : Most of the time you get both at departure, at the counter or in the app. If the second one is missing, the airline's transfer desk prints it during the layover.
- Passports and customs : Passport control happens at the first airport of a zone. In Europe, that is the first Schengen airport: flying to Rome through Paris, you clear immigration in Paris and the Rome leg then works like a domestic flight. In the United States, it is the first US airport, unless you already went through preclearance in Canada. On a Canadian passport, a connection that stays airside rarely needs an authorization, but the rules change: check every country on the itinerary, layovers included, with our travel documents checklist.
- Security : Depending on the airport, you sometimes go through security again during the connection, almost always after customs. Keep your liquids within the allowed format until the end, and be careful with duty-free: a bottle bought at departure can be confiscated at the next checkpoint if it is not in a sealed bag with the receipt.
- Leaving the airport : It is possible if you are allowed to enter the country, but you will go through security again on the way back. For an airport well connected to downtown, the round trip is worth it from a layover of about eight hours.
One ticket is your safety net
When the whole connection is on the same ticket, the airline is responsible for you: if the first flight is late and you miss the second, they must rebook you on the next flight at no charge. Your bags are also checked through to the final destination.
Assembling two separate tickets yourself to save a few dollars works, until the day it does not: in case of a delay, nobody is responsible for your second flight, and you have to collect and re-check your bags in between. If you do it anyway, leave several hours of buffer and ideally an overnight.
How much time to leave between flights
The minimum connection times airlines display are legal, but tight. In practice: an hour and a half is comfortable for a domestic connection, two to three hours for an international one or a terminal change. In a Quebec winter, add margin: storms put short connections at risk, and one flight per day to some destinations means a twenty-four-hour wait if it breaks.
For the United States via Montreal or Toronto, US customs happens at preclearance before boarding, which takes extra time; in exchange, arrival in the US then works like a domestic flight.
The layover can become an asset
A long layover is not always a punishment. Several airlines allow a one-to-three-day stopover in their hub city at no fare supplement: that is two trips for the price of one, in Reykjavik, Lisbon, Amsterdam or Istanbul depending on the airline. If the schedule gives you eight hours in a major European airport anyway, check whether a train reaches downtown in thirty minutes: several capitals taste great in half a day. The full method is in our guide to making the most of a long layover.
The details that save a connection
Always check whether an airport change hides in the itinerary, notably in London or New York: switching airports with bags is long, expensive and stressful. Keep the essentials in your carry-on to survive a bag that takes the next flight. And on a tight connection, a seat near the front of the plane sometimes makes the difference between running and walking.