What is minimum connection time and why does it matter?

Minimum connection time (MCT) is the shortest approved interval between an inbound arrival and a connecting departure at the same airport. Booking below MCT results in an impossible itinerary.

Who sets minimum connection times at airports?

The Airport Operators Committee, comprising all airlines at a given airport, agrees on MCT values, which IATA then reviews and approves before distributing industry-wide. Airlines may also maintain airline-specific MCTs above the standard floor.

What is the difference between minimum connection time and a layover?

A layover is the total scheduled wait between flights; MCT is the regulatory floor that the layover must clear to qualify as a valid connection. Layovers can be much longer than MCT, but they cannot legally fall below it.

How do flight delays affect minimum connection time?

MCT applies to scheduled times, not actual ones. When an inbound flight arrives late, the real transfer window shrinks below the MCT floor and the connection fails. Navan monitors live flight status so travel managers can rebook before travelers reach the departure gate, reducing the cost of downstream overnight stays and rebooking fees.

What are typical MCT values at major international airports?

MCT ranges from 30-45 minutes for domestic-to-domestic connections at efficient hubs to 90-180 minutes for international-to-international transfers at large airports with multiple terminals. Frankfurt's Schengen-to-Schengen MCT is 45 minutes; international transfers reach 90 minutes. Heathrow raised its Terminal 5 MCT to 75 minutes in 2024.

What happens if my first flight is delayed and I miss my connection?

When a missed connection results from an airline delay on a same-ticket booking, the carrier is generally responsible for rebooking passengers on the next available flight at no extra cost. Separate tickets shift that responsibility to the traveler. Navan's AI capabilities and 24/7 support team helps travelers navigate rebooking options quickly, regardless of ticket configuration.

Can a corporate travel policy require longer connection times than the official MCT?

Yes. Corporate travel policies can require longer connection windows than the airport MCT floor, and many do. Requiring 90 minutes for international connections, for instance, reduces missed-connection risk during peak periods.

Navan - Business Travel Solutions & Expense Management

Minimum Connection Time

The shortest approved transfer interval between an inbound flight arrival and a connecting departure at the same airport, set by airline committees and approved by IATA to prevent itineraries with physically impossible connections from being sold through global distribution systems.

Victoria Landsmann

•May 18, 2026•

4 minute read

Key Takeaways

Minimum connection time (MCT) is the shortest officially approved interval between a passenger's inbound arrival and a connecting flight's scheduled departure at the same airport. Each airport sets its own MCT, typically 30-90 minutes for domestic connections and up to 3 hours for international transfers with customs and immigration. Navan surfaces MCT-compliant itineraries so corporate travelers avoid dangerously tight connections.

IATA administers global MCT standards through PSC Resolution 765; OAG tracks over 157,000 industry-standard MCTs and airline-specific exceptions in active use worldwide.
Transfer type determines minimum time: domestic-to-domestic connections run as low as 30 minutes, while international-to-international transfers often require 90 minutes or more.
U.S. DOT data shows international flight delays caused 127,000 missed domestic connections in Q1 2025, underscoring how one late inbound flight cascades downstream.
Navan filters itinerary search results to exclude connections falling below each airport's current MCT, reducing rebooking costs for corporate programs.

What is Minimum Connection Time?

Minimum connection time is the official floor for how long a passenger needs to transfer between flights at a given airport. Airlines and airport operators establish MCTs jointly through the Airport Operators Committee, weighing terminal layout, security screening, passport control, baggage handling, and the physical distance between gates. IATA administers these values globally through PSC Resolution 765, publishing them for use in global distribution systems and airline booking engines [2].

MCT differs from layover duration, which is the total scheduled wait between flights. A layover can exceed the MCT by hours, but it can never fall below it. Think of MCT as the hard floor airlines and booking tools use to filter out connecting flight options that are physically impossible to complete.

How airlines and airports set MCT values

New MCT values go through a three-step approval process: the Airport Operators Committee agrees on a value, submits it to IATA, and IATA distributes the update before it enters booking systems. OAG, one of the primary providers of flight schedule and connection data, tracks over 157,000 industry-standard MCTs alongside airline-specific exceptions [2].

MCTs are categorized by transfer type, and the differences are significant:

Transfer type	Typical MCT range
Domestic to domestic	30-60 minutes
Domestic to international	60-90 minutes
International to domestic	75-120 minutes
International to international	75-180 minutes

Frankfurt Airport's Schengen-to-Schengen MCT runs as low as 45 minutes, while its international-to-international minimum reaches 90 minutes [3]. British Airways raised its MCT at Heathrow Terminal 5 from 60 to 75 minutes in 2024, citing high passenger volumes as the primary driver of missed connections [4].

What factors push MCT values higher?

Several variables cause airports to set stricter minimums:

Terminal changes: Connections requiring a bus, train, or extended walk between separate terminal buildings add 20-40 minutes to the floor.
Passport control: International arrivals entering a new customs zone face variable queue times that airports build into MCT estimates.
Baggage claim: Interline connections where bags must be collected and rechecked at ticketing add significant time compared to through-checked itineraries.
Airport size and gate distance: Large hubs like Chicago O'Hare and Tokyo Narita set longer MCTs because walking distances between concourses exceed those at compact regional airports.

Why MCT matters for business travelers

Corporate travelers flying multi-leg itineraries depend on accurate MCT data to avoid the cost and disruption of missed connections. U.S. DOT data from Q1 2025 shows international flight delays caused 127,000 missed domestic connections, with approximately 70% at major carriers tracing back to European arrival delays [1]. When a traveler misses a connection, the downstream costs include emergency hotel stays, rebooking fees, and delayed client meetings.

For corporate travel programs, MCT risk multiplies across teams. A travel manager monitoring a distributed group on multi-city schedules needs to know which legs carry dangerously tight windows before a storm system triggers a cascade. Booking through Navan Travel surfaces MCT-compliant connection options automatically during itinerary search, filtering out technically viable-looking options that fall below airport MCT thresholds.

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Best practices for booking connections with MCT in mind

A few habits keep business travelers well above the MCT floor:

Add buffer time: MCT is the legal minimum, not a recommendation. Adding 15-30 minutes beyond the MCT protects against minor delays. Navan's guide to avoiding flight delays covers how to build resilient itineraries for high-traffic routes.
Check terminal assignments before confirming: A 75-minute layover in a single-terminal airport is comfortable. The same window requiring an AirTrain or bus shuttle between buildings is a real risk.
Know interline versus online connections: Same-airline (online) connections typically carry lower MCTs than interline connections because the carrier controls both legs. Booking across two airlines often requires a longer minimum than either airline publishes independently.
Account for reclearance requirements: Travelers connecting through certain hubs must clear customs and recheck bags before their domestic segment, adding unpredictable processing time above the MCT floor.

When should you add extra time beyond MCT?

MCT assumes ideal conditions: on-time arrivals, standard queue lengths, and average walking distances. Major hubs during peak travel windows regularly exceed those assumptions. Travelers should build a wider buffer when:

Connecting through a hub known for weather disruptions (Chicago, Denver, New York-area airports)
Transferring between terminals that require a shuttle or train
Arriving on an international flight requiring full customs and immigration processing
Traveling with checked bags booked on separate ticket stocks

Navan flags itineraries where the booked connection window sits within 30 minutes of the airport's MCT, so travelers and travel managers can weigh the risk and choose wider buffers before confirming travel.

Duty of care: A company's legal and ethical obligation to protect employee safety during business travel, which includes confirming travelers are booked on itineraries with realistic connection windows.
Passenger name record (PNR): The airline booking file that stores segment details, MCT-sensitive connection data, and contact information carriers use when rebooking passengers after a missed connection.
Compliance: The practice of confirming that corporate travel bookings meet both internal policy requirements and external operational constraints such as airport minimum connection standards.

Sources

[1] MightyTravels, analysis of U.S. Department of Transportation Air Travel Consumer Report data, "DOT Data Shows International Flight Delays Caused 127,000 Missed Domestic Connections in Q1 2025," April 2025, https://www.mightytravels.com/2025/04/dot-data-shows-international-flight-delays-caused-127000-missed-domestic-connections-in-q1-2025/

[2] OAG, "What Are Minimum Connection Times (MCTs)? An Insider's Guide," https://www.oag.com/blog/minimum-connection-times-insiders-guide

[3] IATA, "Station Standard Minimum Connecting Time(s) (MCT)," https://www.iata.org/en/publications/manuals/station-standard-minimum-connecting-time-mct

[4] The Independent, "British Airways increases minimum connection times at London Heathrow," 2024, https://www.the-independent.com/travel/news-and-advice/british-airways-minimum-connection-time-london-heathrow-b2474807.html

Smart travelers treat MCT as the floor, not the target. For itineraries that stay compliant and connections that hold under pressure, explore how Navan Edge handles the booking experience end to end.

Frequently Asked Questions About Minimum Connection Time

Minimum connection time (MCT) is the shortest approved interval between an inbound arrival and a connecting departure at the same airport. Booking below MCT results in an impossible itinerary.
The Airport Operators Committee, comprising all airlines at a given airport, agrees on MCT values, which IATA then reviews and approves before distributing industry-wide. Airlines may also maintain airline-specific MCTs above the standard floor.
A layover is the total scheduled wait between flights; MCT is the regulatory floor that the layover must clear to qualify as a valid connection. Layovers can be much longer than MCT, but they cannot legally fall below it.
MCT applies to scheduled times, not actual ones. When an inbound flight arrives late, the real transfer window shrinks below the MCT floor and the connection fails. Navan monitors live flight status so travel managers can rebook before travelers reach the departure gate, reducing the cost of downstream overnight stays and rebooking fees.
MCT ranges from 30-45 minutes for domestic-to-domestic connections at efficient hubs to 90-180 minutes for international-to-international transfers at large airports with multiple terminals. Frankfurt's Schengen-to-Schengen MCT is 45 minutes; international transfers reach 90 minutes. Heathrow raised its Terminal 5 MCT to 75 minutes in 2024.
When a missed connection results from an airline delay on a same-ticket booking, the carrier is generally responsible for rebooking passengers on the next available flight at no extra cost. Separate tickets shift that responsibility to the traveler. Navan's AI capabilities and 24/7 support team helps travelers navigate rebooking options quickly, regardless of ticket configuration.
Yes. Corporate travel policies can require longer connection windows than the airport MCT floor, and many do. Requiring 90 minutes for international connections, for instance, reduces missed-connection risk during peak periods.