Air India Domestic-to-International Connection Guide: DEL T3 and BOM T2 (2026)
By Saanvi Iyer (Saanvi Iyer writes offbeat destination guides for Indian travellers — places that work in monsoon, shoulder-season picks, and the cities Indian first-time international travellers underrate. Based in Bangalore, perpetually mid-itinerary.) · Published · 10 min read
Connecting from Air India domestic to international at DEL or BOM is manageable — if you know the exact flow. Here's the step-by-step process for baggage re-check, immigration order, and that precious lounge window between segments.
TL;DR — The Short Answer
If you're connecting from an Air India domestic flight to an Air India international flight, both Delhi T3 and Mumbai T2 keep you within the same terminal. At DEL T3, your checked bags are typically transferred automatically on a single PNR — you still need to clear immigration and security for the international side. At BOM T2, the process is nearly identical. Budget at least 3 hours between domestic arrival and international departure; 4 hours if you're checking in additional bags or want lounge time. Here's the full walkthrough.
Does Your Baggage Transfer Automatically on Air India Connections?
The short answer: it depends on how you booked. If both flights are on a single Air India PNR (i.e., you bought them as one itinerary — either directly on airindia.in or through an OTA that issued a single ticket), your checked bags are typically checked through to your final international destination. You don't collect them at the connecting airport.
If you booked the two flights separately — say, an IndiGo domestic leg on one ticket and an Air India international leg on another — you must collect your bags, exit the domestic area, re-check in at the Air India international counter, and go through the full international departure process from scratch. This is the one that catches people off guard.
Always confirm at check-in whether your bags are tagged through. If the tag reads your final international destination's three-letter code, you're good. If it reads DEL or BOM, you'll be collecting en route.
Tip from experience: Even on a single PNR, ask the check-in agent at your origin to print the through-baggage receipt. It's your proof if a bag goes missing at the hub.
The DEL T3 Connection Flow — Step by Step
Delhi's Terminal 3 handles all Air India domestic and international flights, which is the whole reason this connection works without a terminal shuttle. Here's the flow after your domestic arrival at DEL T3:
- Deplane and follow 'Connecting Flights' signs. Don't go toward the baggage belt if your bags are checked through.
- Head to the Departure Transfer area. There's a dedicated connecting-passenger corridor at T3 that leads you from the domestic arrival pier to the international departure zone. Security will ask for your onward boarding pass — make sure you have it (print or digital).
- Clear the international security check. This is the full drill: liquids in 100ml, laptops out, belts off. Don't carry any domestic duty-free liquids you bought at the origin airport — they'll be stopped here.
- Proceed to immigration. You'll go through departure immigration for the international flight at this point. Keep your passport, boarding pass, and a filled Departure Card ready (or use the e-gate if you're eligible).
- Airside and Gate. You're now in the international departure lounge. Air India's Star Alliance lounge (and the paid Maharaja Lounge) are accessible here if your ticket class or card entitles you.
The whole transit corridor walk at DEL T3 typically takes 20–35 minutes if there's no queue at security. In peak hours — especially morning departure banks — add another 15–20 minutes for immigration.
The BOM T2 Connection Flow — What's Different?
Mumbai's T2 is a unified terminal, so all Air India flights — domestic and international — depart and arrive from the same building. The connecting-passenger flow is similar to DEL T3, but there are a few BOM-specific things worth knowing.
After your domestic arrival, do not exit into the arrivals hall — this is the classic mistake. Look for the 'Transit / Connecting Flights' signage immediately after you leave the aerobridge. Present your onward boarding pass to the CISF personnel, and they'll direct you to the re-security area for the international zone.
One BOM quirk: the international security queues at T2 can be substantially longer than at DEL, especially in the early morning hours when multiple long-haul departures stack up. I've seen 45-minute queues at 3 AM. If your connection window is under 3 hours, don't loiter.
Immigration at BOM tends to move faster than DEL if you use the e-gate with a chipped passport. Enroll if you haven't — it's free at most major airports and cuts queue time dramatically on subsequent trips.
What's the Minimum Safe Connection Time?
Air India's published MCT (Minimum Connection Time) at DEL T3 for domestic-to-international on the same airline is typically around 2 hours, and similarly at BOM T2. But 'minimum' means the absolute floor — it's not a comfortable target.
Here's a more honest breakdown by situation:
- Bags checked through, no lounge, e-gate eligible: 2.5–3 hours is tight but usually workable.
- Bags NOT checked through (two separate tickets): Allow 4 hours minimum. You'll need to collect bags, re-check, and start from scratch at the international counter.
- If you want lounge time: Add 1 hour on top of whatever your base buffer is. Rushing through a lounge defeats the point.
- Peak travel seasons (October–January, April–May): Add 30–45 minutes for longer security and immigration queues.
My honest recommendation: 3 hours minimum for same-ticket connections, 4 hours if the flights are on separate bookings. These are the numbers I tell friends, not the airline's optimistic MCTs.
Lounge Access Between Domestic and International Segments
The lounge window is a legitimate perk of this connection — but you need to be airside (past international security and immigration) to access the international lounges at both DEL T3 and BOM T2.
Air India's own Maharaja Lounge at DEL T3 is accessible to Business Class passengers and eligible Star Alliance Gold card holders. If you're flying Economy on both segments, most credit-card lounge access (Priority Pass, Diners Club, Amex, Axis Atlas) will work at the Plaza Premium or other airside lounges at T3.
At BOM T2, Air India operates its lounge near Gate 32 area on the international side. Check your card's lounge list on the issuer's website before you fly — lounge access policies change more often than airlines announce. Priority Pass covers a handful of lounges at T2; verify on the PriorityPass.com list.
One thing to note: you cannot access international lounges before clearing immigration. This means if you're rushing a tight connection, the lounge isn't available until you've cleared security AND immigration. Factor that into your timeline.
What If Your Domestic Flight Is Delayed?
This is where it gets stressful. If your domestic leg is delayed and you miss your international connection, the resolution depends entirely on how you booked.
Single PNR (same ticket): Air India is obligated to rebook you on the next available international flight at no additional cost. You may also be entitled to meals and accommodation depending on the delay duration — check DGCA's passenger rights circular, which sets out compensation timelines and meal voucher thresholds. The airline's ground staff at the hub should proactively assist you.
Separate tickets: You're on your own. The domestic carrier (Air India or any other) fulfilled its obligation by getting you to the hub, late or otherwise. Your international ticket's cancellation and rebooking policy applies — which on most economy fares means you'll pay a change fee or buy a new ticket. Travel insurance with 'missed connection' coverage is genuinely worth buying if you're doing a split-ticket connection like this. Check the policy wording carefully — some insurers only cover if the delay exceeds a certain number of hours.
Honestly, if you're booking a split-ticket domestic-international combination, I'd search for options on FlightGPT's AI flight search first — it surfaces connections that airlines actually protect, which saves you a world of grief later.
Quick Tips and Things Most People Miss
- Web check-in timing: For Air India international flights, web check-in opens 48 hours before departure. Do it before you board your domestic flight so you already have your international boarding pass in hand at the connection point.
- Carry-on liquid trap: Any liquids, aerosols, or gels you buy at domestic duty-free (or bring as carry-on) will be re-screened at international security. Stick to the 100ml rule in your hand baggage — the domestic duty-free items don't get a free pass at international security.
- Departure card (India): India's Departure Card for international travel is now largely electronic for Indian passport holders using e-gates. But keep a physical copy of your itinerary and hotel booking anyway — immigration officers occasionally ask.
- Currency: If you need to pick up forex, the currency exchange counters airside at DEL T3 and BOM T2 are reasonably accessible but rarely offer good rates. Sort your forex before you fly — see our forex card guide for a less painful approach.
- Bags over 15kg on the domestic segment: Air India's domestic baggage allowance on economy can differ from the international allowance. If your international ticket includes 23kg or 30kg, confirm with the check-in agent at origin that they've tagged your bags at the higher allowance — this matters at DEL/BOM if anyone weighs your bags again.
Frequently asked questions
Do I need to collect my checked bags when connecting from Air India domestic to international at Delhi?
If both flights are on a single Air India PNR, your bags are typically checked through to your final destination and you don't collect them at DEL. If you booked two separate tickets, you must collect your bags and re-check them at the Air India international counter. Always confirm the through-baggage tag at your origin airport.
How much time do I need for an Air India domestic-to-international connection at BOM T2?
Air India's published MCT is around 2 hours, but a realistic buffer is 3 hours for same-ticket connections and at least 4 hours for split-ticket bookings. Peak-season mornings at BOM can see 45-minute immigration queues, so err on the longer side.
Can I use my credit-card lounge access between domestic arrival and international departure at DEL T3?
Yes, but only after you clear international security and immigration — which means you need to be airside on the international departure side. Priority Pass, Diners Club, and similar cards are accepted at certain lounges at DEL T3. Check the lounge locator on your card issuer's or PriorityPass.com to confirm current access — policies change periodically.
What happens if my Air India domestic flight is delayed and I miss the international connection?
If it's a single-PNR ticket, Air India must rebook you on the next available flight at no cost and provide meals/accommodation depending on delay duration — DGCA's passenger rights circular covers the specifics. If the flights are on separate tickets, you're responsible for rebooking your international leg, which may involve a change fee or new ticket purchase. Travel insurance with missed-connection cover is worth having for split-ticket journeys.
Do I go through immigration before or after the domestic-to-international security re-check?
At both DEL T3 and BOM T2, you first clear international security (re-screening), and then proceed to departure immigration for your international flight. Don't exit toward the domestic arrival hall — look for 'Transit / Connecting Flights' signs immediately after deplaning.
Is web check-in available for Air India international flights before I board my domestic segment?
Yes. Air India international web check-in opens 48 hours before departure. If you do it before boarding your domestic leg, you'll already have your international boarding pass on your phone, which speeds up the transit process significantly at the hub.