Bangalore airport metro opening in phases: dates and delays for Devanahalli

Since 19 August 2026, the Blue Line has no longer been a single project with a single opening date. If the airport metro is part of your reason for buying in Devanahalli, that change affects you more than almost anyone else along the route.

In brief

In August 2026, the target for the entire Blue Line, from Silk Board to the airport, moved from December 2027 to March 2028. The northern section, from Hebbal to the airport, is now meant to open first and on its own, aiming for September 2027.

However, the part carrying the stations near Devanahalli is the one falling behind. On 19 August 2026, Deccan Herald reported that even the September 2027 date now looks doubtful for that stretch. The line will be finished. Just do not plan around a single date any more.

Two August announcements, pulling in opposite directions

Two pieces of news came out in the same month, which is why coverage seemed confusing. Early in August, BMRCL announced that construction on the Blue Line had passed 72 per cent. That was real progress and was reported as good news. Later that month, the finish date for the full 58.19 km route moved from December 2027 to March 2028. Reports also suggested the northern section's September 2027 goal was at risk.

Both statements are accurate. A line can be 72 per cent built and still run late. The final stretch of a metro project is not more concrete. It is tracks, power, signalling, systems testing, trial runs and safety approval, and none of that can begin until the structure beneath is complete.

Every deadline so far

Four official dates have been announced, and the target has changed three times. That does not mean the project is failing. It means each announced date has tended to be the hopeful one.

The northern section is really three contracts

Very few property websites explain this. Yet it is the detail that tells you when trains might actually reach Devanahalli. The Hebbal-to-airport link is split into three construction contracts.

Look closely at the middle row. The stations serving this area are not scattered along the line. Nearly all of them sit within that one 15 km contract. The 19 August Deccan Herald report focused on precisely this: progress beyond Yelahanka is lagging.

The contractor for that stretch, NCC, reportedly wants until March 2027. After that, trial runs would push passenger services towards September 2027 at the earliest. So the picture for a Devanahalli buyer is tighter than the headline suggests. The real story is not that the metro is 72 per cent built and due in 2027. It is that the 15 km serving your area is the stretch where the contractor is asking for extra time.

What is slowing the southern link

The connection between KR Puram and Hebbal, through Nagawara, is now expected sometime between December 2027 and March 2028. Two issues are holding it up.

Hebbal station is being built with four tracks. It must also serve the future Orange Line, not just the Blue Line. Interchange stations are the hardest structures on any metro system. Hebbal is already one of the city's tightest junctions, and clearances on the Outer Ring Road have added delays.

Further south at Silk Board, the viaduct is being lengthened by about 413.8 metres over the existing flyover, so trains have space to reverse. It is a short piece of work with a big effect on the schedule. Until it is done, the line cannot properly end there.

Stations that serve Devanahalli

Heading north, the final stations are Bagalur Cross, Bettahalasuru, Doddajala, Airport City at ground level, and KIAL Terminals below Terminal 2. Doddajala and Bettahalasuru serve the KIADB Aerospace Park area. Doddajala is generally described as two to three kilometres from the park gate. No station called Airport Halt exists, and none called KIADB either, despite what some listings claim.

An overlooked benefit, and its limits

A phased opening has one interesting side effect. If the northern section opens before the southern link is ready, Devanahalli could have metro trains before the line runs all the way into the city. That sounds like good news, but be careful.

A Hebbal-to-airport service that does not yet connect to KR Puram only takes you as far as Hebbal. Hebbal is exactly where the corridor's worst traffic is. You would leave the train at the very junction the metro was meant to help you avoid, then switch to a bus, a car or a longer route.

It would help with airport trips and jobs in north Bengaluru. It would do much less for a daily commute to the east or the city centre. The line becomes truly useful once the KR Puram link opens, with interchanges to the Purple Line at KR Puram and the Pink Line at Nagawara. Current guidance puts that between late 2027 and March 2028.

Metro dates against the Parklane handover

For a Prestige Parklane buyer, one comparison puts all this in context. The project received Karnataka RERA registration on 15 September 2026, with a declared completion date of 31 December 2030.

Even if the line slips another year, trains should be running well before handover, a comfortable margin for anyone planning to live there. For a Parklane buyer, then, the question is less whether the metro opens before you move in. It is how much of the price uplift happens while your flat is being built.

What to do if you are buying

Base your decision on what already works. The airport, its two runways and Terminal 2 are all in use. So is the Doddaballapur Bypass to Hoskote section of the ring road. If the purchase makes sense on those alone, it makes sense.

Count the metro as a bonus, with a flexible date. ₹10,584 crore is committed to Phase 2B, and the viaduct is already standing. Two stations are privately funded. Embassy is paying about ₹140 crore for Bettahalasuru, and the airport operator is paying about ₹800 crore for the 4.95 km airport section and its two stations. Companies do not co-fund public transport on a whim. The line is coming; only the month is uncertain.

If you need a date, plan for March 2028 rather than September 2027. Using the later date costs nothing if the earlier one holds, and protects you if it slips.

Track the Yelahanka-to-airport contract. Ignore the overall percentage. That single 15 km section is the best early warning for this area.

How to check progress yourself

Metro dates on property websites go stale fast, ours included, which is why we date every update.

Look at the contract, not the whole line. A single completion figure for a 58 km route averages a nearly finished section with a lagging one. Ask which section and which contractor.

Check whether a date is for a section or the full route. Since August 2026 those are different dates, and sellers have a reason to quote the earlier one.

Read BMRCL's own updates and the local press, not listing pages. Deccan Herald and The Hindu report contract-level progress, often with site photos. A date without a named source should carry little weight.

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