IndiGo has 64% of the market: what that does to groups

You call the group desk for a 25-seat block to Leh and the fare comes back firmer than it did two seasons ago. No competing quote lands on your desk from a rival airline because there mostly isn't one to call. IndiGo and Air India Group between them carried more than nine in ten domestic passengers in the first half of 2026 (Outlook Business, citing Ministry of Civil Aviation data), and for an operator running fixed departures, that number is the reason your group and series fares stopped moving.

This isn't abstract market-share trivia. It's the explanation for why your negotiating leverage on a block booking has shrunk, why deposit and name-change terms have hardened, and why one carrier's bad month, as December 2025 proved, can wreck an entire season's worth of departures sitting on that one airline. This post walks through how concentrated the market actually is, what that does to your group fares and deposit terms, what the December 2025 crisis cost operators who had all their eggs in one carrier's basket, and the practical moves that still work when you can't out-negotiate a duopoly.

How concentrated Indian aviation really is in 2026

IndiGo carried 555.83 lakh domestic passengers in H1 2026 for a 64.3% market share; Air India Group carried 221.67 lakh for 25.7%. Together the two groups moved over 90% of India's 864.04 lakh domestic passengers in the January-June window (Outlook Business, 21 July 2026).

Akasa Air held 5.5% of the market and SpiceJet 3.3%, splitting what's left between them. Total domestic traffic for the half-year grew just 1.44% year-on-year, from 851.74 lakh to 864.04 lakh, and June's traffic (134.64 lakh) actually fell 1.03% from May (136.04 lakh). A market that size, growing that slowly, concentrated that heavily in two groups, is not a market where a third or fourth carrier can easily undercut a group fare on your route.

Full-year 2025 domestic traffic came in at 1,669.46 lakh (16.69 crore) passengers, up 3.48% on 2024 (Outlook Business, 4 February 2026). Worth flagging clearly: the exact monthly split moves. IndiGo's share dipped to as low as 59.6% in December 2025 after a crew-rule crisis grounded over half its daily schedule, then recovered through 2026. Other 2026 reporting and a Competition Commission complaint (more on that below) have cited IndiGo's share above 65%. Treat any single month's number as a snapshot, not a fixed fact, and anchor your planning on the H1 2026 aggregate, the most current verified breakdown as of August 2026: IndiGo and Air India Group control north of 90% of the seats you're bidding for.

A separate complaint filed with the Competition Commission of India, alleging the two carriers abused their dominant position through cancellation charges and pricing, cited IndiGo at "more than 65%" domestic share and Air India at "around 27%", roughly 90% combined (Outlook Business, 12 March 2026). The CCI closed that case in March 2026, finding the cancellation policies were disclosed in advance and applied uniformly, so no antitrust violation. The dominance itself wasn't in dispute. Only whether it was being abused.

Why a group desk prices differently when nobody is bidding against them

A group fare desk negotiates the way any seller does when it knows the buyer has few other places to go: it holds firmer on price and softer on flexibility. Before 2023, an operator with a 20-seat block to a leisure route could realistically shop the same dates across three or four full-service and low-cost carriers and let them compete for the business. That competitive tension is what actually moved group fares down from list price.

With over 90% of domestic seats sitting inside two groups, that tension has largely gone. A group desk quoting your Ladakh or Andaman series doesn't need to beat a rival's offer, because there frequently isn't a rival offer on the table. The mechanics of how block fares, deposits and name-change windows actually work haven't changed; what's changed is how much room you have to push back on them. If you need the underlying mechanics themselves, from block deposits to name-change fee structures, that's covered in full in how group airfare blocks actually work. What this post is about is the market condition sitting behind those mechanics, and why the same block-fare desk that used to negotiate is now largely quoting.

What deposit and name-change terms look like on a duopoly desk

This is a pattern operators report, not a published statistic, and it should be read that way: as reasoning from market structure, not as a sourced rate card.

The logic is straightforward. A group desk that doesn't need to compete for your business has less reason to compete on the terms attached to that business either. Deposit percentages on block bookings, the window in which you can rename a passenger without penalty, and how much notice you get before a fare is repriced all sit within the airline's discretion, and discretion tends to firm up when the seller has fewer rivals pulling it the other way.

Careful: Don't assume the deposit and name-change terms you negotiated two seasons ago still hold. Benchmark whatever your current group desk quotes against the documented block-fare mechanics covered above before you build a new departure's costing sheet around old assumptions.

None of this means group fares are unworkable. It means the terms deserve a fresh read every season, and that assuming last year's flexibility carries forward is the mistake that shows up as a costing gap three weeks before departure.

The December 2025 lesson: what one carrier's crew-rule crisis does to a season

In December 2025, IndiGo cancelled more than half of its roughly 2,200 daily flights starting around 5 December, after the DGCA rolled out new Flight Duty Time Limitation (FDTL) rules governing pilot rest hours. IndiGo attributed the mass cancellations to the new rest-hour norms; the Airline Pilots' Association disputed that framing, suggesting the disruption may have been engineered pressure against the rule change (Outlook Business, 23 December 2025). Whatever the cause, the effect on operators holding blocks with IndiGo that month was the same: flights simply weren't flying.

The numbers put a scale on what "concentration risk" actually means in a duopoly. IndiGo's monthly market share fell from 63.6% in November to 59.6% in December, its cancellation rate for the month hit 9.65% against an industry average of 6.92%, and more than 10.46 lakh passengers were affected (Outlook Business, 4 February 2026). Air India Group's share rose to 29.6% that month and Akasa's to 5.2%, simply from absorbing the overflow.

The regulatory and financial fallout followed quickly. The Ministry of Civil Aviation rolled back and deferred the new FDTL norms to February 2026 in response to the disruption. The DGCA separately fined IndiGo ₹22.2 crore in January 2026 over the cancellations (Outlook Business, 18 January 2026). IndiGo itself estimated the disruption cost it about ₹577 crore, a factor in a 76% fall in Q3 FY26 net profit to ₹550 crore even as revenue grew 6% to ₹23,472 crore, and the airline moved to hire over 1,000 pilots in the weeks after (Outlook Business, 22 January and 14 February 2026).

None of those figures describe what happened to a small operator's block booking that month. But they tell you the scale of what one carrier's operational failure can do inside a market this concentrated: a nine-day window that dented one airline's own quarter by hundreds of crores also dented, proportionally, every group departure that had no alternative carrier to fall back on.

Worked scenario: a 30-seat block on one carrier when the schedule breaks

Say you're running a 30-seat block for a December departure, booked entirely on one carrier, deposit paid, names locked six weeks out. This is modelled on the shape of the December 2025 disruption, not a real booking.

Example: Your 30-seat block carries a 25% deposit on a fare of ₹9,500 per seat, so ₹71,250 already paid to the airline. Five days before your departure window, that carrier cancels the outbound sector as part of a mass-cancellation event affecting over half its daily schedule that week. There is no fare protection built into a group block for an airline-side operational cancellation, only for your own cancellation. You now need 30 seats on an alternative carrier, inside five days, on a route where the only other major players hold a combined 35% or so of capacity between them. Rebooking at short-notice fares for 30 people, even at a conservative ₹2,000-₹3,500 per seat premium over your original block rate, adds ₹60,000-₹1,05,000 to a departure that was already costed and sold. Your deposit on the cancelled sector may or may not be refunded promptly, and even if it is, you've already spent it twice: once as a sunk deposit, once again buying replacement seats at a worse rate.

The passenger-facing side of this, what your clients are actually owed under DGCA rules when a flight is delayed or cancelled and how to claim it, is a separate playbook of its own. What this scenario is meant to show is the operator-side exposure: a whole departure's deposit and rebooking cost concentrated on one carrier's operational risk, with no group-fare clause that protects you from it.

Building a two-carrier or Gulf-hub alternative without wrecking your costing

Splitting a departure across two carriers is not free. It usually means smaller blocks on each, which can push you out of the better group-fare brackets, and two sets of deposit and name-change deadlines to track instead of one. But it converts a single point of failure into two, and after December 2025, that trade reads differently than it did before.

The practical version: for a series running across a season rather than a single date, alternate the carrier by departure batch instead of splitting every block. A 15-seat IndiGo block on one date and a 15-seat Air India or Akasa block on the next protects the season even if it doesn't fully protect any single departure. Where a Gulf-hub routing is a genuine substitute, that's its own costing exercise, covered in the Gulf-route Dubai survival playbook, worth running even when your default routing is direct. For a domestic group squeezed onto one carrier's terms, moving the same block by train instead is worth costing too, especially on routes where FTR coaches are realistic.

New capacity is also opening up, slowly. Noida International Airport (Jewar) began commercial passenger flights on 15 June 2026, with IndiGo, Akasa Air and Air India Express as launch carriers, IndiGo alone planning to connect 16 or more cities from the new airport (Outlook Business, June 2026). A new airport doesn't change who owns the seats, since it's the same two dominant groups flying from it. But it does add fresh slot capacity on routes that were previously constrained, which is worth checking against your own network. The full repricing implications of the new-airport rollout are covered in what operators must reprice for the Navi Mumbai and Noida airports.

The negotiation levers a small operator still has

You can't out-negotiate a market where two groups hold 90% of the seats. But a handful of levers still work inside that constraint.

• Aggregate volume through a consolidator or B2B portal. A single operator's 20-seat block carries less weight than a consolidator moving hundreds of seats a month across many operators' bookings. Comparing what the major B2B portals actually offer on group fares and net rates is worth doing before you commit volume to one.
• Move departures to off-peak days of the week. Group desks price against demand density on a given date. A Tuesday or Wednesday departure on the same route frequently prices better than a Friday-Sunday one, purely because fewer group requests are competing for that day's capacity.
• Commit early on thin routes. Routes with genuinely limited frequency (some hill and Northeast sectors, for instance) reward early commitment more than negotiation. The fare doesn't soften as the date approaches; it hardens as seats fill from other bookings.
• Protect your no-show and cancellation discipline. Airlines track which operators actually fly the seats they block versus who releases them late or no-shows repeatedly. A clean track record is one of the few things that still buys goodwill with a group desk that has no competitive pressure forcing it to be flexible otherwise.

None of these levers reopen the market. They just make you a slightly better customer inside a market that isn't going to reopen on its own in the next year or two.

What could reopen competition by 2027

A handful of developments are worth watching, none worth planning around yet.

In late December 2025, the civil aviation ministry issued no-objection certificates to two prospective new domestic carriers, Al Hind Air and FlyExpress. Shankh Air, a UDAN-focused regional carrier based in Lucknow, had regulatory clearance and planned to start operations sometime in 2026 (Outlook Business, 26 December 2025). All three were pitched as challengers to the duopoly. None will meaningfully dent a 90% combined share in their first year, even on schedule.

In July 2026, reports surfaced that the Adani Group was evaluating an airline launch aimed at competing with the duopoly. Adani publicly called the reports "entirely baseless and factually incorrect" within about a day of the story running (Outlook Business, 23-24 July 2026). Treat this as speculative, denied colour, not a pending development, until something more concrete surfaces.

The more concrete thing to watch is slot capacity at new airports like Noida, since that's real infrastructure already operating rather than a rumoured entrant. Whether it translates into more competitive group fares depends on which carriers actually build out frequency there over the next year, and that's worth tracking route by route rather than assuming.

Common questions

Who has the biggest market share in Indian aviation?

IndiGo is the largest domestic carrier by a wide margin, holding 64.3% of the domestic market in H1 2026, with Air India Group second at 25.7%. Together the two control over 90% of India's domestic air traffic, leaving Akasa Air (5.5%) and SpiceJet (3.3%) to split most of what remains.

Why are domestic airfares so high in India?

Concentration is one real factor: with two groups controlling over 90% of domestic seats, there's less competitive pressure pushing fares down on many routes, including group and series fares. It sits alongside other pressures like fuel costs and route-specific demand, but for group desks specifically, the lack of a genuinely competing carrier on many routes is a direct driver of firmer pricing.

What is group booking in IndiGo?

IndiGo, like other Indian carriers, runs a separate group booking process for blocks of seats (typically above a minimum passenger count) booked together for tours, events or corporate travel, with its own fare, deposit and name-change terms distinct from individual retail fares. The specific mechanics of how these blocks, deposits and name-change windows work are covered earlier in this piece.

Are group flight bookings cheaper?

Usually, yes, relative to booking the same number of seats individually at retail fares, because group desks quote a bulk rate. But "cheaper than retail" is not the same as "competitively priced", and in a concentrated market the bulk discount itself has less room to move than it did when more carriers were bidding for the same group business.

The short version

• IndiGo and Air India Group together carried over 90% of India's domestic passengers in H1 2026 (IndiGo 64.3%, Air India Group 25.7%), with Akasa at 5.5% and SpiceJet at 3.3%. Treat any single month's share as a snapshot; it moved as low as 59.6% for IndiGo in December 2025.
• That concentration is why group and series fare desks have less reason to compete on price or on deposit and name-change flexibility than they did before 2023.
• December 2025's crew-rule crisis cancelled over half of IndiGo's roughly 2,200 daily flights, cost the airline an estimated ₹577 crore and a ₹22.2 crore DGCA fine, and is the clearest real-world proof of what one carrier's failure does inside a two-carrier market.
• A block sitting entirely on one carrier has no fare protection against that carrier's own operational cancellations; splitting a season's departures across two carriers, or costing a Gulf-hub alternative, converts one point of failure into two.
• New airport capacity (Noida/Jewar, live from June 2026) is real but doesn't change who owns the seats flying from it; check route-by-route before assuming it softens your fares.
• Volume aggregation through a consolidator, off-peak weekday departures, early commitment on thin routes and clean no-show discipline are the levers that still work inside a concentrated market.
• New entrants (Shankh Air, Al Hind Air, FlyExpress) and the denied Adani-airline speculation are worth watching for 2027, not worth planning your 2026-27 season around.