IndiGo Mumbai-Hanoi flights start October 25: guide

IndiGo has scheduled daily nonstop flights between Mumbai and Hanoi from October 25, 2026. Flight 6E 1637 is the outbound service from Mumbai, while 6E 1638 returns from Hanoi.

The airline has published the route, timetable and booking channels. At the time of this October 25 review, however, we had not found reliable independent confirmation that the first sector had completed. Opening-day passengers should use IndiGo's live flight status and their issued itinerary before leaving for the airport.

*Original AI-generated OpenSim editorial illustration. It is not a photograph of an IndiGo aircraft, Mumbai Airport, Noi Bai Airport or the first flight.*

The practical answer: IndiGo says 6E 1637 leaves Mumbai at 4:15am and reaches Hanoi at 10:00am, while 6E 1638 leaves Hanoi at 7:05pm and reaches Mumbai at 11:05pm. The flights are daily and all times are local. Check the time, date and terminal on the live booking because third-party schedule pages already differ by a few minutes.

The daily route is scheduled from October 25

IndiGo's September 2 announcement describes a daily, direct Mumbai-Hanoi service effective October 25, 2026. It also says the schedule remains subject to regulatory approvals.

That wording matters. An announcement and a ticket listing show the airline's plan, but they do not prove a particular flight has departed or arrived. A current seller page lists the service for October 26, while the airline's own published time remains the best source for the planned timetable. Use the airline's status tool for same-day decisions.

This is a new IndiGo route, not Mumbai's only nonstop link with Hanoi. Compare the operating airline, flight number, baggage and change terms on the exact fare rather than assuming every BOM-HAN option has the same conditions.

Flight times are local in both directions

IndiGo publishes this timetable:

India is 90 minutes behind Vietnam, so subtracting the clock times does not give the actual flight duration. The morning departure also makes the Mumbai airport journey an overnight task. Work backward from the check-in deadline and arrange transport for the early hours rather than treating 4:15am as the time to reach the terminal.

Some third-party schedules show a 4:10am departure after the launch date. Five minutes can decide whether a copied reminder is useful or misleading. Follow the time printed on the live IndiGo booking and recheck it before travel.

Check Terminal 2, then confirm it on the booking

Current schedule listings place 6E 1637 at Mumbai Terminal 2 and Noi Bai Terminal 2. Noi Bai's official terminal guide identifies T2 as the international terminal. The airline's announcement does not state terminal numbers, so the issued booking and airport departure board remain the controlling sources.

Do not confuse Hanoi's T2 with domestic Terminal 1. If the trip continues on a domestic flight, the terminal change comes after entry formalities and baggage collection. The airport's official transfer guide says international arrivals retrieve their bags, clear customs and take the free shuttle from T2 to T1 before domestic check-in.

The airport currently lists the inter-terminal shuttle from 5:00am until 1:00am the following day, with service every 15 or 20 minutes for much of the day. Opening hours and frequency can change, so check the airport page for the travel date and leave a connection buffer.

Use the fare and itinerary for bags and check-in

IndiGo's baggage page uses route, fare and passenger-specific tables. Do not borrow a domestic allowance for this international flight or assume that a cabin bag, checked bag or special item is included because another traveller had it.

Read the allowance in the fare before paying, then keep the issued itinerary. If the journey combines airlines or separate booking references, ask where the bag is tagged and whether it must be collected in Mumbai or Hanoi. A through fare is not the same thing as two tickets bought together in one shopping session.

IndiGo's public check-in pages and conditions have changed over time, and searchable copies do not consistently show the same international cutoff. Use the deadline attached to the flight in the app, ticket or check-in message. Arrive well before that closing point to allow for document checks, baggage drop, security and outbound immigration.

IndiGoStretch is planned on the route

IndiGo says its IndiGoStretch product will be available on the Mumbai-Hanoi service. The airline lists a wider seat, additional legroom, deeper recline, adjustable headrest, hot meal, in-seat charging and priority services among the features.

Check that the product appears on the chosen flight and fare before paying. A route-level announcement does not guarantee the same seat or service after an aircraft change. It also does not turn a separate onward ticket into a protected connection.

Vietnam entry depends on the traveller

Entry permission depends on nationality, passport, travel purpose and length of stay. Vietnam's official electronic visa portal currently describes e-visas valid for up to 90 days, with single-entry and multiple-entry options. Noi Bai is listed as a permitted air entry point.

Do not use another passenger's approval as proof that yours is complete. Apply only through the official government site, check the passport details letter by letter and carry the required document in a form you can show without mobile data. Travellers who qualify for an exemption should still verify its conditions for their own passport and dates.

At Hanoi, the airport's international-arrival guide sends passengers first to immigration, then baggage claim and customs. Leave enough time for queues and bag delivery before a pickup, hotel promise or separate onward flight.

Plan the Hanoi arrival before takeoff

The 10:00am scheduled arrival is useful for daytime transport, but the airport is outside central Hanoi. Noi Bai's official transport page lists metered taxis and public bus routes including 86, 68, 109 and 90. Check the current stop, operating hours and payment method for the route you intend to use.

Use the official pickup area or a reputable booked service. Ignore unsolicited offers from people who intercept passengers inside or outside arrivals. Save the accommodation address in Vietnamese, the pickup instructions and a backup transport option offline.

For a domestic connection, do not plan around a best-case immigration story from another traveller. Queue length, baggage delivery, terminal transfer and the next airline's cutoff can all vary. A single protected ticket gives clearer recovery options than a self-transfer, but you still need to follow the baggage and terminal instructions given for the booking.

Choose data for Mumbai, Hanoi or both

An OpenSim India eSIM can support flight alerts, the early Mumbai airport ride and last-minute messages before departure. An OpenSim Vietnam eSIM can help with maps, transport and accommodation contact after landing. Travellers who need ground data in both countries can compare an Asia 20 areas plan with two separate country plans.

Choose from the live product card. Check allowance, validity, supported networks, activation rule, reduced-speed conditions and top-up eligibility. The catalog showed eligible top-up options when reviewed on October 25, but plan details can change and not every OpenSim package should be assumed reloadable.

Install on reliable Wi-Fi and save essential documents offline. An eSIM uses supported mobile networks on the ground. It does not provide inflight Wi-Fi, change an airline's schedule, extend an airport shuttle's hours or protect a separate connection.

If this is your first digital SIM, check when to install an eSIM, whether your phone supports eSIM and how much travel data to plan before departure.

Ten questions about IndiGo's Mumbai-Hanoi flights

When did IndiGo's Mumbai-Hanoi flights start?

IndiGo announced October 25, 2026 as the effective date. At the time of this review, the route was published and on sale, but we had not independently confirmed completion of the first sector. Use live flight status for an opening-day trip.

Does IndiGo fly Mumbai to Hanoi every day?

The announced frequency is daily in both directions. A daily launch plan does not guarantee that every later date remains unchanged, so search the exact date before making a non-refundable arrangement.

What times are 6E 1637 and 6E 1638?

IndiGo lists 6E 1637 from Mumbai at 4:15am, arriving in Hanoi at 10:00am. It lists 6E 1638 from Hanoi at 7:05pm, arriving in Mumbai at 11:05pm. All times are local and the live booking controls.

Is the IndiGo Mumbai-Hanoi flight nonstop?

Yes. IndiGo describes the service as daily and direct, and the published timetable shows one BOM-HAN sector in each direction. Check that the booking carries flight 6E 1637 or 6E 1638 rather than a connecting itinerary.

Which terminals does the flight use?

Current schedule listings show Terminal 2 at Mumbai and Terminal 2 at Hanoi. Noi Bai officially identifies T2 as its international terminal. Confirm both terminals on the airline booking and airport board because assignments can change.

How early should I reach Mumbai Airport?

Use the international check-in and bag-drop deadline shown for the flight, then arrive well before it. The 4:15am departure means the airport journey happens during the night, and online check-in does not remove document, baggage, security or immigration steps.

How much baggage is included on this route?

The selected fare and itinerary provide the answer. IndiGo publishes different baggage conditions by route and fare, so do not apply a domestic allowance or another passenger's ticket to this international journey.

Is IndiGoStretch available between Mumbai and Hanoi?

IndiGo says it plans to offer IndiGoStretch on the route. Confirm the cabin and included services on the exact flight before paying because an equipment change can alter the product.

Do I need a visa for Vietnam?

It depends on the traveller's passport, purpose and stay. Use Vietnam's official immigration sources for the current exemption or e-visa rule, and make sure the approval matches the passport and Noi Bai entry before departure.

Can I connect from the IndiGo flight to a domestic flight in Vietnam?

Yes, but an international arrival normally means immigration, baggage collection, customs and a transfer from T2 to T1 before domestic check-in. Prefer one protected booking, follow the bag tag and airline instructions, and leave enough time for queues and the shuttle.

Before travelling

• Check that the booking shows BOM and HAN.
• Confirm 6E 1637 or 6E 1638 and the correct local date.
• Use the live flight status during the opening week.
• Verify both terminal numbers before leaving.
• Read the baggage line on the selected fare and issued ticket.
• Follow the check-in and bag-drop deadline for the exact flight.
• Verify Vietnam entry permission for each traveller.
• Keep onward flights on one protected booking where practical.
• Save the hotel address, transport plan and documents offline.
• Recheck flight, entry and airport information close to departure.

Next update: first-operation confirmation

We will update this guide after reliable confirmation of the first operation or for a material change to the start date, frequency, flight times, terminals, aircraft product, baggage, check-in, entry or connection guidance.

Airline, airport, immigration, public-question and OpenSim catalog evidence was reviewed on October 25, 2026. Public discussions helped identify questions about terminal transfers, bags, visas and ground transport. They were not used as evidence for airline or government rules.