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Flight layover time calculator

Official minimum connection times for 112 airports

Enter your airport and connection details. The headline is the published minimum connection time. Next to it is a comfortable time: the minimum plus 30 minutes, or plus 60 when you clear customs or go through security again after a terminal change. No signup.

Want the underlying data?

The airport connection time page has the full sortable table behind this calculator: minimum connection times and airside connectivity for all 112 airports, plus airport-by-airport layover guides for the major hubs.

Minimum connection at ATL

55min

Comfortable

85+ min

The shortest connection airlines usually sell here. Includes the walk between gates. Source: OAG

Comfortable is our guidance, not a rule.

Flying Delta both ways?Delta is a hub carrier here, with its own same-airline minimums
Both flights on Delta?
ConnectionDeltaAirportvs airport
Domestic → Domestic40'55'-15'
Domestic → International40'60'-20'
International → Domestic85'90'-5'
International → International85'90'-5'

Delta's same-airline minimums (OAG). Mixed-airline connections use the airport standard.

Based on:
Connection times are estimates. Verify with your airline.Powered by Travel VientTerms

Layover calculator questions, answered

How does the flight layover calculator work?

Pick your airport and describe the connection: domestic or international legs, same or different terminals, and checked bag or not. The headline is the official minimum connection time (MCT) for that connection at any of 112 airports. Next to it is a comfortable time, our guidance rather than a rule: the minimum plus 30 minutes, or plus 60 when you clear customs or go through security again after a terminal change.

What is a minimum connection time (MCT)?

The minimum connection time is the shortest legal gap between flights that airlines will sell on a single ticket at a given airport. It is a booking rule, not a comfort guideline. An itinerary at exactly the MCT has no slack: one late inbound flight or a slow customs queue and the connection fails.

How much layover time should I add on top of the minimum?

Airport-standard domestic minimums across the 112 airports we track run from 20 minutes (AKL) to 120 minutes (MXP, YYZ). The minimum is the shortest connection an airline will sell, so the calculator also shows a comfortable time: the minimum plus 30 minutes, or plus 60 when you clear customs or go through security again after a terminal change.

Does the calculator account for customs and immigration?

Yes, whenever you clear entry. You clear customs when an international arrival connects to a domestic flight, and on any international transfer unless the airport or border agency says transit stays airside (Canada's Free Flow transit at Vancouver and Montreal, for example). When you do, the comfortable time is the minimum plus 60 minutes instead of 30 (the same as a terminal change that goes through security again), and the result notes that the minimum includes customs and, with a checked bag, the bag recheck.

Is a layover on two separate tickets riskier?

Much riskier. On a single ticket the airline must rebook you free if a late inbound flight breaks the connection. On separate tickets no one owes you anything: you collect any checked bags, re-check them, often change terminals, and buy a new ticket if you miss the second flight. The calculator assumes one ticket with bags checked through, so on separate tickets add extra padding on top of its target.

Which airports does this layover calculator cover?

112 airports worldwide, each with its published minimum connection times and terminal transfer system, verified against official airport and OAG data. The full sortable table lives on the airport connection time page.

Sources

The minimum connection times (OAG data, read via ExpertFlyer), carrier minimums, airside and customs answers and terminal transfer times in this calculator were verified against the following pages. See our research methodology for how we vet and update data.

32 sources

If a figure looks wrong, email hello@vient.org, see how we handle corrections, or browse past fixes in our public changelog.

Airport data last verified . Minimum connection times come from official airport sources and OAG data; always confirm with your airline before booking a tight connection.