Group airfares decoded: blocks, deposits, name-change dates

If you run fixed departures, at some point you stop booking flights one PNR at a time and start blocking seats. A group air block is a set of seats an airline holds against a deposit before you have named passengers, released on your schedule against deadlines that airlines enforce strictly and explain badly. Most operators learn the deadlines the hard way, usually by missing one.

This is the part of the business that never makes it into a consumer guide, because it isn't consumer-facing. Your clients never see a block, a name list, or a material date. You do, and if you get the dates wrong you either lose the deposit, lose the discount, or both.

Here's how group air blocks actually work, how to set one up with the major domestic carriers, and the maths on when blocking beats booking retail and when it doesn't.

How a group air block actually works

A group air block is a temporary hold on a set of seats (usually 10 or more) on a specific flight and date, secured with a partial deposit instead of full payment, with passenger names added later against airline-set deadlines. You commit to a headcount and route before you have signed clients, then fill in names as bookings confirm.

Indian airlines run this as a dedicated channel, separate from retail booking. Air India's group booking portal and IndiGo's group desk both require a minimum of 10 passengers travelling on the same flight and route before they'll quote a group fare at all. Below 10, you're back to booking individual retail fares, however many people you're travelling with.

The sequence, in outline:

1. You submit a group request: route, date, headcount, and travel class.
2. The airline's group desk quotes a fare and a hold period.
3. You pay a partial deposit to confirm the block (not the full fare).
4. You submit the name list by the deadline, in stages if the airline allows partial releases.
5. You pay the balance and the airline issues tickets against confirmed names.
6. Any unnamed seats past the deadline are released back to the airline, at a cost to you.

Every one of those steps has its own date, and the dates are what actually determine whether a block saves you money or costs you money.

Setting up a group desk with IndiGo and Air India

Both IndiGo and Air India run their group booking through a dedicated request form rather than the normal retail search-and-book flow, and both quote through a group desk team rather than an instant online fare. You send the request, wait for a human quote, and negotiate from there if the headcount or dates give you leverage.

To register a group request with either carrier, you'll typically need to have ready:

• Sector and exact travel dates (or a date range if you're flexible)
• Total passenger count, split by adult/child if relevant
• Class of travel
• A contact number and email that the group desk will use for all correspondence, including deadline reminders (don't let this be a number that changes with staff turnover)
• Your agency's registration or GST details, since group fares are booked B2B, not as a retail passenger

Air India's process runs through its own group ticketing portal, linked above. IndiGo's runs through a similar dedicated group request channel rather than the consumer booking engine on indigo.com. In both cases, expect the quote to take a business day or two to come back, which matters if you're trying to lock a fare before a competing operator does. If you're still deciding whether a group desk or a regular B2B channel makes sense for your ticketing volume, that's worth weighing against the broader question of where a small agency should actually book flights.

Careful: Group desk quotes are not guaranteed until you pay the deposit. A verbal or emailed fare quote can move if load factors on that flight shift while you're deciding. Don't advertise a per-seat price to clients until the block is actually confirmed with your deposit paid.

The deposit-and-deadline tracker

The single biggest cause of lost deposits and lost discounts on group blocks is losing track of which date does what, across multiple departures running at once. Airlines communicate deadlines by email, buried in PDFs, and it is genuinely easy to run three or four blocks in parallel and lose the thread on one of them.

Run one row per block in a tracker like this, and check it weekly through your booking season:

Field	What to fill in
Departure / route	e.g. "Ladakh batch 3, DEL-LEH-DEL"
Airline & block reference	Airline group desk reference or PNR shell
Block size	Total seats held
Deposit amount & due date	Amount paid to hold the block, and the date it was due
Name list due date	Deadline to submit passenger names against the block
Partial release allowed (Y/N)	Whether names can be added in batches or must go in one file
Name-change / correction cutoff	Last date a name on the list can still be corrected or swapped, and any fee for doing so
Balance payment due date	Date the remaining fare is due, ahead of ticketing
Ticketing deadline	Date the airline issues tickets against confirmed names
Unsold seats as of [date]	Running count of seats still unnamed, checked weekly
Status	Confirmed / at risk / released

A block deposit is cash tied up ahead of client payments coming in, which is worth planning against your broader cash-flow calendar rather than treating it as a one-off outflow. Annotated, the two rows that actually cost operators money are the name list due date and the name-change cutoff. Airlines generally price a name change or correction after the cutoff as a fresh fare difference, sometimes close to what a new retail ticket would cost, treating it as a new booking rather than an edit. Reports circulating among group-desk regulars put the window for final name submission at roughly 48 to 72 hours before departure, but this varies by airline and by how firm your particular quote was, so confirm the exact cutoff on the quote itself before you rely on it, as of July 2026.

Careful: The name-change cutoff is not the same as the balance payment due date. You can be fully paid and still lose money if you submit a wrong or changed name after the correction window closes. Treat the name list as final internally at least a week before the airline's own cutoff, to leave room for your own errors.

When a group fare beats retail, and when it doesn't

A group fare is worth blocking when the quoted rate is meaningfully below what you'd pay booking the same seats individually closer to departure, after accounting for the deposit you're tying up and the risk of unsold seats. It is not automatically cheaper just because it's called a "group fare."

Group fares are commonly quoted below the lowest published retail fare available at the time of the request, since you're committing headcount in advance and giving the airline a load-factor guarantee. Industry guides for group bookings in India cite discounts of roughly 10-30% below prevailing retail, though this is a reported range rather than a published airline rule, varies by route, season and how far out you book, and should be checked against your actual quote rather than assumed.

Example: Say you're blocking 15 seats DEL-LEH-DEL for a July departure, and the group desk quotes ₹9,200 per seat against a retail fare of ₹12,000 that day. That's a 23% discount, in line with the reported range. On 15 seats, that's a saving of ₹42,000 across the block, against a deposit of, say, ₹1,000 per seat (₹15,000) tied up weeks in advance. If you sell all 15 seats, the maths clearly favours the block. If you sell only 11 and eat 4 unsold seats at ₹9,200 each (because the deposit and any per-seat penalty apply regardless), the saving shrinks to roughly ₹5,200, and you've locked up cash for longer to get there.

The comparison that matters isn't "group fare vs retail fare on paper." It's group fare, minus your realistic fill rate, minus the deposit's opportunity cost, versus what you'd have paid booking retail closer to the date once you had firm numbers. On a route and season you sell out reliably, blocking wins. On a route you're testing for the first time, the retail fare booked in batches as you confirm passengers is often the safer bet, even at a worse headline rate.

The maths of eating unsold block seats

Unsold seats in a block cost you the deposit on those seats plus, in many quotes, a per-seat penalty or the full group fare regardless of whether the seat travels. The airline holds you to the headcount you committed to, not the headcount you eventually sell.

Run the numbers before you commit to a block size, not after:

Example: A 20-seat block at ₹8,500 per seat, deposit ₹1,200 per seat. You sell 16 seats. The 4 unsold seats still carry their share of the deposit (₹4,800) and, per this operator's quote terms, the airline charges the full fare on unreleased seats past the name-list deadline, meaning those 4 seats cost ₹34,000 with nobody flying on them. Against the ₹27,200 you saved on the 16 you did sell (say retail was ₹10,200 that day, a ₹1,700 per-seat saving), that's a net loss of ₹6,800 on the block once the 4 unsold seats are accounted for, the opposite of what the headline discount suggested.

This is the same break-even logic that governs fixed departures generally: a block is really a bet on your fill rate, priced in advance. If you haven't already worked through the break-even and cancel-or-merge maths for fixed departures, the same framework applies to the air block sitting inside that departure, it's just one more line item with its own deadline risk.

Two practical guardrails operators use to cap this downside:

• Block conservatively against your worst realistic fill rate for that route and season, not your best case, and top up with retail seats if demand runs ahead of the block.
• Where the airline allows partial releases, release unsold seats back the moment you're confident they won't sell, rather than holding them to the deadline hoping for late bookings. A partial release close to the cutoff usually recovers more of your deposit than none at all.

Common questions

How many passengers do you need for a group airfare in India?

Air India and IndiGo both set the group-desk threshold at 10 passengers travelling on the same flight and route. Below that headcount, you book through the normal retail channel, however many travellers you have, because group desks won't quote a fare for smaller groups.

Is IndiGo group booking actually cheaper than booking individually?

It can be, but it isn't guaranteed. Group fares are typically quoted below the retail fare available at the time of the request, with industry estimates in the 10-30% range, but the real comparison has to net out your deposit, your realistic fill rate, and any penalty on unsold seats, not just the quoted per-seat rate against retail.

What happens if I don't fill all the seats in a group block?

Unsold seats past the name-list deadline are typically released back to the airline at a cost to you: at minimum the deposit on those seats, and in many quotes the full group fare regardless of whether the seat travels. Confirm the exact penalty terms on your specific quote before you commit to a block size.

The short version

• A group air block is a seat hold secured with a partial deposit before you have named passengers, released against airline-set deadlines rather than paid in full upfront.
• Air India and IndiGo both require a minimum of 10 passengers on the same flight and route before their group desks will quote a fare.
• Group fares run below retail, reportedly by 10-30%, but confirm the actual discount and penalty terms on your specific quote rather than assuming the reported range.
• The name-list deadline and the name-change cutoff are the two dates that cost operators the most when missed, and they are not the same date as the balance payment due date.
• Track every block in one tracker, one row per departure, checked weekly, because losing the thread across multiple blocks is the real failure mode, not misunderstanding any single rule.
• Unsold seats cost you the deposit plus, often, a per-seat penalty regardless of whether anyone flies, so block against your worst realistic fill rate, not your best case.
• Blocking wins on routes you sell out reliably; on an untested route, booking retail in batches as you confirm passengers is often the safer call even at a worse headline fare.