Delhi Airport T3 Connections: How Long You Need

The honest answer to a delhi airport connection time question is that it depends on a single fork in the road, not on how early you land. If both your flights use Terminal 3, your connection is a walk inside one building. If your domestic flight departs from Terminal 1 instead, your connection is an exit through customs, a shuttle ride to a different building, and a fresh check-in and security screening. The two situations are not close in how much time they take, and the terminal your flights use is decided by airline, not by you, so the first thing worth checking before you worry about the clock is which terminal each leg actually uses.

This guide walks through both sequences at Delhi's Indira Gandhi International Airport (DEL), what DIAL's own transit pages say about each, and what independent guidance suggests for a comfortable buffer, since the airport's own pages describe the process but do not publish a minimum connection time figure.

Same-terminal: the domestic transfer facility inside T3

Terminal 3 is the only terminal at Delhi that serves all international flights and some domestic ones, which is what makes a same-terminal connection possible in the first place. If your domestic connection is on Air India, Akasa Air, or a Vistara-branded domestic service, it operates from T3, and DIAL's own international-to-domestic transfer page lays out the sequence directly: clear immigration, collect your checked baggage, clear customs, then follow the yellow-coloured signage to the domestic transfer area, without exiting the terminal building.

Two details in that sequence are easy to miss and worth planning around. First, you collect your own checked baggage at this stage; DIAL's page is explicit that bags are not automatically through-transferred between an international arrival and a domestic departure, even when both flights are inside T3. Second, "without exiting the terminal building" means this is a same-terminal, landside-to-domestic movement, not a repeat of airport security from outside, though you will still clear a domestic security screening before your gate, as any domestic departure requires.

Cross-terminal: T3 to T1

If your domestic connection is with IndiGo or SpiceJet, it departs from Terminal 1, a separate building from T3. DIAL's transfer page describes this as a genuine exit-and-re-entry: clear customs at T3, then use the free inter-terminal shuttle bus or a taxi to reach T1, and re-enter through the departure level there for a normal check-in and security screening, the same as if you had arrived at the airport from outside rather than off a connecting flight.

This is the connection type that actually costs time, because it is not one continuous secure-side movement the way the T3 domestic transfer is. You are leaving the international arrivals side entirely, travelling by road between two buildings, and starting the domestic departure process from the beginning once you arrive at T1.

The T3–T1 shuttle, step by step

DIAL runs a free inter-terminal shuttle between T3 and T1, and its own commute page states the service operates 24 hours a day, departing roughly every 20 minutes. The T3-side pickup point sits near Pillar No. 10, outside the terminal on the arrivals side. At the counter there, you show a same-day boarding pass or ticket for your onward domestic flight, and staff issue a transit coupon that you use to board.

Third-party travel guidance, including simpleflying's coverage of Delhi connections, puts the ride itself at somewhere between 25 and 45 minutes depending on traffic and the time of day, since T1 and T3 sit several kilometres apart by road rather than adjoining each other. Add the time to reach the shuttle pickup point after clearing customs, the wait for the next departure, the ride itself, and the walk from the T1 shuttle drop-off to the check-in counters, and the cross-terminal connection adds up to considerably more than the shuttle's own transit time.

How much time to actually leave

DIAL's own transit pages describe the process at each terminal in detail but do not publish a minimum connection time figure for either the same-terminal or the cross-terminal case. Independent aviation guidance fills that gap: simpleflying's coverage of Delhi airport connections suggests roughly 90 minutes as a workable minimum for a same-terminal T3 domestic connection, and roughly 3 hours for a cross-terminal T3-to-T1 connection. Treat both figures as third-party guidance rather than an airport-published rule, and read them as a floor, not a target: a 90-minute same-terminal connection assumes an on-time arrival, no queue at immigration, and no extra bag-drop delay, and a 3-hour cross-terminal connection assumes the shuttle runs on its usual schedule and T1 security is not unusually busy.

If your itinerary already runs close to either figure, the more useful question is not "is this technically enough time" but "what happens if my international leg lands 30 minutes late", since a late inbound flight eats directly into whichever buffer you started with.

Booked as one ticket vs. two separate tickets

How your two flights are booked changes what you are responsible for during the connection. On a single itinerary under one PNR, the airline (or its interline partner) typically checks your bag through to the final destination and handles the connection as part of one journey, which removes the baggage-collection step from the same-terminal sequence above. Booked as two entirely separate tickets, on two different PNRs, you are your own connection: you collect your bag at the first arrival regardless of terminal, and you check in again from scratch for the second flight, at whichever terminal it departs from. A same-terminal domestic transfer on separate tickets still uses the Domestic Transfer Facility described above, but you are re-checking in there rather than simply walking to a gate, which is worth building extra time around if you have booked this way.

How TrackMyWings helps

TrackMyWings™ is a flight-tracking platform in development. A private beta shipped on 2026-08-24, Android only, on the Play internal testing track, with no fixed public launch date yet. Our Delhi airport page and Delhi to Mumbai route page are in the directory today, alongside a Mumbai airport page for the other end of that route. Gate and status alerts are planned for launch, and that is where the timing questions in this guide would get answered against your actual flight rather than a general rule.

Common questions

Do I need to go through security again for my domestic leg at T3?

Yes. Even inside the same terminal, a domestic departure requires its own security screening before the gate, separate from the immigration and customs process you clear on arrival as an international passenger.

Is the T3–T1 shuttle free?

Yes. DIAL's own commute page describes it as a complimentary service; you present a same-day boarding pass or ticket at the T3 counter near Pillar No. 10 to receive a transit coupon and board.

What if my domestic flight is also from T3?

Then your connection is the same-terminal case in this guide: clear immigration, collect your checked baggage, clear customs, and follow the yellow signage to the Domestic Transfer Facility without leaving the terminal building, rather than exiting for a shuttle.

What if my international leg is delayed?

A late inbound flight eats directly into whatever buffer you planned, whichever type of connection you have. This is exactly where checking your flight's live status before you head to immigration matters: a delay you know about early lets you decide whether to head straight for the shuttle counter or the domestic transfer signage without wasting time on a route you no longer have time for, rather than finding out only after you have queued at the wrong point in the sequence.

Sources

• DIAL, Passenger Transit Guide, Delhi Airport (confirms T3 as the only terminal serving both domestic and all international flights): https://www.newdelhiairport.in/passenger-transit-guide/ (captured 2026-09-23).
• DIAL, International to Domestic Transfer, Delhi Airport (the official step-by-step for same-terminal and cross-terminal transfers): https://www.newdelhiairport.in/international-to-domestic/ (captured 2026-09-23).
• DIAL, Commute from Terminal 3, Delhi Airport (the T3–T1 shuttle's hours, frequency and pickup point): https://www.newdelhiairport.in/commute-from-t3/ (captured 2026-09-23).
• simpleflying, "How Long Do I Need To Connect At Delhi Indira Gandhi International Airport?" (third-party guidance on minimum connection times, since DIAL publishes none): https://simpleflying.com/delhi-airport-connection-time/ (captured 2026-09-23).