An airport layover is a scheduled stop between connecting flights, during which a traveler waits at an intermediate airport before boarding the next leg of their journey. For domestic routes, a layover typically lasts less than four hours; for international routes, any connection under 24 hours is considered a layover. Once a connection exceeds those thresholds, it is generally classified as a stopover.
TL;DR / Key takeaways
- A layover is a short connection between flights at an intermediate airport, lasting under four hours domestically or under 24 hours internationally.
- Once those time thresholds are crossed, the stop is classified as a stopover rather than a layover.
- For most domestic connections, a safe buffer is 90 minutes to 2 hours; for international connections involving customs and immigration, plan for at least 2 to 3 hours.
- A long layover (roughly 3 hours or more) is a good opportunity to access an airport lounge for a meal, shower and comfortable seating.
- If your flights are on the same booking and the airline causes a missed connection, it is obligated to rebook you at no extra cost.
Layover vs. stopover vs. connection: what’s the difference?
Three terms often get used interchangeably, but airlines, award programs and travel writers treat them as distinct. Understanding the difference matters when booking connecting itineraries, especially if you’re building a multi-city award ticket or trying to add an extra city to a trip.
| Term | Domestic threshold | International threshold |
|---|---|---|
| Connection | Any stop to change planes | Any stop to change planes |
| Layover | Under 4 hours | Under 24 hours |
| Stopover | 4 hours or more | 24 hours or more |
The 24-hour rule for international flights comes directly from how airline reservation systems categorize connections on award tickets. Programs like Air Canada Aeroplan treat a stop under 24 hours as a simple connection with no additional cost or ticketing complexity. Cross that threshold and you’re officially in stopover territory, which may require a separate ticket or carry specific award rules depending on the program.
How long should a layover be?
The official minimum connection time (MCT) is the shortest interval an airport or airline allows between an arriving flight and a departing one. But the official minimum is not the same as a comfortable minimum. Delays, long walks between terminals and immigration queues can all eat into your buffer.
As a general rule, plan for at least 90 minutes to 2 hours on a domestic connection and 2 to 3 hours on an international one. At large, complex airports like JFK, LAX or London Heathrow, where terminal changes can require buses or trains and immigration lines are often long, lean toward the higher end of those ranges or beyond.
A few factors that affect how much time you really need:
- Terminal transfers: Switching terminals often adds 20 to 40 minutes, especially at airports where you must exit and re-clear security.
- Checked baggage on international arrivals: Arriving in the U.S. from abroad typically requires you to claim your bags and recheck them, even on a single itinerary. Build that into your timing.
- Airport size: You can cross Portland International Airport in a few minutes. Getting from one end of O’Hare to the other is a different story.
- Separate tickets: If your two flights are booked independently, no airline owes you a rebooking if the first one runs late. The risk falls on you.
How to make the most of a long layover
A layover of three or more hours does not have to mean staring at a departure board. With a little planning, you can arrive at your destination feeling rested rather than frazzled.
- Use an airport lounge: Lounges offer comfortable seating, Wi-Fi, food and drinks and often showers. Access comes through airline elite status, premium travel card benefits or a paid day pass, which typically runs $50 to $85 at the door. Many experienced travelers deliberately book longer layovers just to take advantage of lounge access.
- Look into airline stopover hotel programs: Several carriers offer complimentary or subsidized hotel stays for passengers with long layovers. Check with your airline before booking, as eligibility requirements vary. Check out TPG’s ultimate guide to airline stopover programs.
- Leave the airport: If your layover/stopover exceeds six hours, leaving the terminal to explore the city can be worth it. Check transit visa requirements in advance; some countries require a visa even for airside connections, while others offer streamlined transit permits.
- Pack strategically: Keep a change of clothes, toiletries and any medications in your carry-on rather than checked bags. If your bags are delayed or misrouted, you’ll still have everything you need to stay comfortable.
