How to block group flight seats for Diwali 2026: the travel agent playbook for peak season
By Kabir Malhotra (Kabir Malhotra writes about how Indian travel buyers actually pay — UPI vs credit card vs forex card surcharges, reward-point math on the top travel credit cards, RBI tokenisation, EMI-on-flights and the small fees that compound across a year of bookings.) · Published · 11 min read
Diwali 2026 falls in the third week of October. If you are a travel agent who plans to handle group bookings for that period — family reunions, office outings, school pilgrimages — July is not just the ideal month to start blocking seats. It is basically the deadline. After that, availability on the key corridors disappears into an exponential pricing spiral that no client budget survives intact.
TL;DR — the core timing and mechanics
For Diwali 2026 group travel, book by July — ideally before the end of June — to hold reasonable fares and seat availability on high-demand corridors like Mumbai-Delhi, Delhi-Jaipur and Bengaluru-Kolkata. Group bookings (10+ passengers) require a separate group quote from the airline or a group-desk request through your B2B platform; these come with a structured deposit (typically around 50% of the total fare) to hold the seats, with the balance due closer to departure. Do not attempt to replicate a group booking by assembling 10 individual PNRs — the fare, the deposit, and the seat-block mechanics work completely differently.
Why July is the hard deadline for Diwali seat blocks
Airlines open inventory on a rolling schedule — typically about 9-12 months ahead for domestic routes. For Diwali (late October), inventory has been open since December 2025 or January 2026. By the time most agents start thinking about peak season, leisure travellers have already been booking for months.
Here is the dynamic that catches agents off guard: Diwali demand on Indian domestic routes is not a gentle curve. It is a cliff. Flights on the three or four days immediately before and after the main holiday — the Dhanteras evening departure, the Diwali-day morning flight, the Bhai Dooj return — are effectively sold out on key corridors by August in a normal demand year. By September, even alternate dates are showing full or near-full.
Group-desk seats work a little differently from individual seats — airlines hold a small allocation for group bookings separately from the public inventory. But that group allocation is finite too, and it goes to the agents who request earliest. The group desk at IndiGo and Air India works on a first-requested, first-served basis for the hold allocation. If you call the group desk in September asking for 20 seats on the Diwali corridor, you will likely be told no.
The practical cutoff: submit your group quote requests to the airline group desk or your B2B platform's group-booking channel by the end of July 2026. This gives you a reasonable chance of securing a hold on seats at fares that are painful but not catastrophic. August requests are a lottery; September is almost certainly too late for the best corridors.
How group bookings actually work — PNR structure and the deposit
A group booking for 10 or more passengers works fundamentally differently from aggregating 10 individual tickets. Here is the mechanics:
Group quote request: You contact the airline's group desk (IndiGo's is at group.bookings@goindigo.in — verify the current email on indigo.com; Air India's group desk contact is on airindia.com under 'Group Bookings') or submit through your B2B platform's group-booking module if it has one. You provide: route, outbound and return dates, number of passengers, and a rough age breakdown (adults, children under 12). The airline or platform responds with a group fare quote.
The group PNR: Group bookings are typically placed on a single PNR (or sometimes split across two PNRs if the group exceeds 9, because some airline systems cap a PNR at 9 passengers). A single PNR means the group travels together under one booking reference — seat assignments, check-in, meal requests are managed as a block. Splitting a 20-person group across three individual PNRs to avoid the group booking process is a common agency mistake that creates seat-assignment chaos and eliminates the group fare.
Deposit structure: Once you accept a group quote, the airline requires a deposit — typically in the range of 40-60% of the total group fare value — within a short window (often 48-72 hours) to hold the seats. The balance is due a fixed number of days before departure (varies by airline and booking class, commonly 30-45 days out). If you miss the balance payment deadline, the seats are released and you forfeit the deposit. This is not negotiable on a standard group booking.
Name submission: Airlines allow group bookings to be confirmed before all passenger names are known — you hold the seats first, submit names later (usually no later than 15-21 days before departure). This is a major practical advantage of the group booking channel; individual PNRs require names at booking.
Route-specific advice: Mumbai-Delhi-Jaipur corridor at Diwali
The Mumbai-Delhi and Delhi-Jaipur corridors are the most congested in India during Diwali, and they deserve specific attention.
Mumbai-Delhi: Both IndiGo and Air India operate this at very high frequency (combined, there are dozens of departures daily), but the sheer volume of demand from Mumbai's large north-Indian diaspora — going home for Diwali — absorbs almost all of it. Expect IndiGo's group fares on this corridor in the Diwali window to be 30-50% above shoulder-season group prices. Air India's group fares on the same route are sometimes marginally cheaper due to different yield targets; always get quotes from both. Consider neighbouring airports: Chhatrapati Shivaji Maharaj International (BOM) versus Navi Mumbai airport (if operational and relevant by late 2026 — verify status closer to date) — check if Air India Express or Akasa offer competitive fares from BOM to Delhi on the surrounding dates.
Delhi-Jaipur: A short sector that often gets caught in an oddity: because the flight is only about 45 minutes, airlines run it with smaller narrow-body aircraft, which means fewer total seats and faster sell-out. Group blocks on this route for Diwali period need to be requested even earlier — ideally June for October travel. Volvo bus coaches from Delhi to Jaipur (5-6 hours, several operators running 24-hour departures) are a viable group travel alternative if flights are gone or overpriced; it is worth quoting both options to clients.
Bengaluru-origin groups: Demand from Bengaluru to Delhi and Kolkata is also very heavy. IndiGo and Air India have good frequency on Bengaluru-Delhi; Bengaluru-Kolkata is operated by fewer airlines and the group fare situation there is tighter. Air India (post-Vistara merger, it absorbed many of the former Vistara routes) has some premium inventory on this corridor that is worth checking for groups wanting a more comfortable option.
What to do when the group desk says no seats are available
It happens — especially if you are approaching this in September or October. Options, in rough order of sanity:
Flex the dates: The two days before the main Diwali cluster (usually 4-5 days around the festival) and the two days after the big return rush are significantly cheaper and more available. If your client group has flexibility — a school group, an extended family that can arrange to leave two days earlier — this is usually the first thing to try.
Flex the airports: Delhi-Jaipur group blocked out? Check Delhi-Ajmer (Kishangarh Airport) or a Delhi-Jodhpur routing. Not ideal for every group, but sometimes the alternate airport is the only available option at a reasonable price.
Train travel: For groups up to 50-60 passengers, Indian Railways group booking is a genuinely robust option. The Railways group quota requires a minimum of 8 passengers, and Tatkal group bookings have different rules from advance bookings. It is slower, obviously, but on the 6-8 hour Rajdhani/Shatabdi corridors (Delhi-Jaipur, Mumbai-Pune, Delhi-Lucknow) it is comfortable and very price-competitive with peak-season flight fares.
Charter options: For groups over 50-60 passengers where flights are completely unavailable, air charter brokers can sometimes source small aircraft for point-to-point charter. The economics only work at that scale, and you need charter operator relationships. This is a last resort, not a first move.
For current fare comparison across airlines before submitting group quotes, FlightGPT's AI flight search gives you a quick picture of what retail fares look like on the dates you are targeting — useful context before negotiating group rates with the airline desk.
Managing payments and avoiding deposit forfeiture
The deposit-and-balance structure of group bookings creates a cash flow management challenge that many smaller agencies underestimate.
The typical scenario: you accept a group quote, the airline requires a 50% deposit within 48 hours, and you need to collect that money from the group members — some of whom are still deciding, some of whom are slow to pay. If you front the deposit from your agency wallet and clients fail to pay you back within the window, you are carrying that exposure. If you wait to collect from clients first, you risk losing the seat hold.
The discipline that experienced group agents use: collect at least 60% of the total fare from clients before committing the deposit to the airline — the extra 10% buffer covers one or two clients who drop out and need a replacement, administrative costs, and a small float. Charge clients a non-refundable commitment fee (separate from the ticket price) of roughly ₹500-₹1,000 per passenger at the time they confirm participation. This fee covers your deposit risk if they drop out later.
The balance payment deadline (usually 30-45 days pre-departure) is another calendar event to track vigilantly. If your B2B platform or agency software does not automatically remind you of payment deadlines, put it in your calendar with a 7-day buffer. Airlines do not call to remind you; they release the seats. For agents using FlightGPT Partner, the wallet-balance visibility on every screen helps you verify you have the funds in place before the deadline hits. Related reading: B2B platform comparison and IndiGo student fare rules for agents.
Frequently asked questions
When is the absolute last date to book group flights for Diwali 2026?
For Diwali 2026 (third week of October), the practical deadline to request group seats on high-demand corridors like Mumbai-Delhi and Delhi-Jaipur is July 2026 — ideally by end of July. After that, group allocations on the most popular departure dates are likely gone or limited to high-price inventory. August requests are possible but depend on route and airline; September is generally too late for the peak-demand dates.
What is the minimum group size for a group booking on IndiGo?
IndiGo's group booking desk handles requests for 10 or more passengers. The specific minimum may vary by route or availability; confirm with IndiGo's group desk directly (contact details on indigo.com). For groups of 9 or fewer, individual bookings on a single PNR are the standard approach. Note that grouping 9 individual seats on one PNR is different from a formal group booking and may not get the group quote pricing.
How much deposit do airlines typically require for group bookings?
The deposit on a group booking is typically in the range of 40-60% of the total group fare, required within 48-72 hours of the group quote being accepted. The exact percentage varies by airline, route and booking class. Air India's group desk and IndiGo's group desk both publish their current deposit terms in the group quote — read the terms carefully before accepting.
Can group booking seats be cancelled and deposits refunded?
Group bookings come with their own cancellation and refund rules that differ from individual ticket policies. Typically, the deposit is non-refundable if seats are cancelled after a certain point (varies by airline and booking class). Partial cancellations — where some passengers drop out but the group minimum is maintained — may be allowed with a per-passenger cancellation fee. Full group cancellations close to departure usually result in full deposit forfeiture. Read the specific terms in the group quote before committing.
What happens if one passenger in a group needs to change their name after the PNR is issued?
Name changes on group PNRs are subject to the airline's name-change policy, which typically allows one change per passenger for a fee (usually in the range of ₹200-₹1,000 per segment for domestic, more for international). Airlines vary on how many total name changes they allow on a group PNR before they treat it as a new booking. Establish the name-change terms in your group booking agreement with clients at the outset — late name changes always attract fees.
Is it cheaper to book a group via the airline directly or through a B2B platform?
It depends on the B2B platform's relationship with the airline group desk. Larger B2B platforms with volume commitments sometimes negotiate access to group desk pricing, but many B2B platforms do not offer group-booking facilities at all — they offer standard individual ticket booking at B2B net fares. For large groups (20+ passengers), contacting the airline's group desk directly (or through a consolidator who specialises in group seats) often yields the best pricing. Compare group desk quotes against standard B2B individual fares to determine which route is genuinely cheaper for your specific booking.