Biman Bangladesh Airlines is embarking on the largest fleet expansion in its history after ordering another 11 Boeing aircraft, taking its total commitments to the US manufacturer this year to 25 jets.

The latest agreement covers five Boeing 787-10 Dreamliners and six 737-8s and follows an already substantial order for 14 Boeing aircraft announced in April.

Combined, Biman has now ordered 15 Boeing 787 Dreamliners and 10 Boeing 737 MAX aircraft during 2026.

For an airline that currently operates a fleet of just 19 aircraft, that's an enormous expansion.

So, where exactly is Biman Bangladesh heading?

Boeing and Biman announced the latest deal on the 23rd September, following a signing ceremony held on the sidelines of the United Nations General Assembly in New York.

The new order consists of:

Those aircraft are in addition to the 14 Boeing jets ordered by Biman on the 30th April 2026. That first agreement included eight 787-10s, two 787-9s and four 737-8s and if you put the two deals together and Biman's 2026 Boeing shopping list now looks like this:

13 Boeing 787-10s

2 Boeing 787-9s

10 Boeing 737-8s

That's 25 aircraft in total. It's a remarkable commitment from an airline of Biman's current size.

The scale becomes clearer when you compare the orders with Biman's existing operation.

Biman currently has 19 aircraft, including 14 Boeing jets and five De Havilland Canada Dash 8 Q400 turboprops.

Its Boeing fleet already includes members of the 787 Dreamliner family, Boeing 777s and older-generation 737s.

The latest orders aren't simply about replacing those aircraft.

Biman has explicitly described the programme as both fleet renewal and network expansion, suggesting the airline expects to become considerably larger over the coming years.

Biman chairman Rumee A Hossain said the latest agreement responds to specific requirements within the airline's fleet plan, with international connectivity for Bangladesh, its expatriate population, business and tourism all identified as priorities.

Perhaps the most interesting part of Biman's order is the sheer number of Boeing 787-10s.

Biman already operates smaller members of the Dreamliner family, but it hadn't ordered the largest 787 variant until this year.

It now has 13 of them on order.

The 787-10 sacrifices some of the extreme range available from the smaller 787-9 in return for greater passenger capacity.

That makes it particularly useful on busy long-haul and medium-haul routes where an airline wants to carry more passengers without necessarily requiring the maximum range of the 787 family.

Biman has specifically identified high-demand Middle Eastern services as one use for the aircraft.

That's significant given the enormous market between Bangladesh and Gulf countries, driven partly by the large Bangladeshi expatriate and migrant-worker population.

Rather than relying exclusively on foreign airlines to carry that traffic through their own hubs, Biman clearly wants a greater share of it.

The two additional 787-9s ordered in April serve a slightly different purpose.

Boeing said those aircraft are intended to support Biman's longer-haul ambitions in Europe and North America.

Biman already operates the 787-9 and currently serves Toronto via Istanbul, while its international network stretches across Europe, the Middle East and Asia.

Additional 787-9s could give the airline considerably more flexibility to develop genuinely long-haul routes from Bangladesh.

That's where Biman's expansion becomes particularly interesting.

This isn't simply a plan to put larger aircraft onto existing routes. The airline and Bangladeshi government have repeatedly referred to opening new international destinations.

Exactly where all of those aircraft will eventually fly remains to be seen.

At the other end of the fleet, Biman is also making a major investment in the Boeing 737-8. Ten are now on order.

These aircraft are expected to gradually modernise Biman's single-aisle operation while also giving it additional range and capacity to develop routes around South Asia, Southeast Asia and the Middle East.

Boeing says the 737-8 and 787 families can offer a 20% to 25% improvement in fuel use compared with the aircraft they replace.

There's another advantage too: commonality.

Biman is already a substantial Boeing operator. Expanding around the 737 and 787 families allows the airline to build upon aircraft types, engineering infrastructure and operational experience it already has.

But there's an intriguing complication.

Despite the enormous Boeing commitment, Biman's future fleet might not be exclusively Boeing.

Bangladeshi reporting indicates that discussions surrounding Airbus aircraft remain ongoing.

A separate proposal could potentially involve as many as 10 Airbus aircraft, comprising four A350-900 widebodies and six A321neo narrowbodies.

No equivalent firm order has been announced for those aircraft at the time of writing, so they should be treated separately from the 25 confirmed Boeing orders.

But if an Airbus agreement eventually goes ahead as well, Biman's fleet transformation would become larger still.

It would also create a much more diverse operation, potentially involving the Boeing 737 MAX, 787 Dreamliner, Airbus A321neo and A350 alongside whatever aircraft remain from today's fleet.

The aircraft purchases aren't taking place entirely in an aviation vacuum.

The latest agreement was signed in New York in the presence of senior Bangladeshi and US government officials, including US Secretary of Commerce Howard Lutnick and US Deputy Secretary of State Christopher Landau.

Reuters has reported that the aircraft purchases have also featured in wider trade discussions between Bangladesh and the United States.

Bangladesh is a major exporter to the US, particularly through its enormous garment industry, and the countries have been negotiating over trade and tariffs.

Earlier this year, Bangladesh moved towards Boeing after a long-running contest between Boeing and Airbus for Biman's fleet requirements.

That doesn't mean Biman doesn't have a genuine operational requirement for new aircraft. The airline and Boeing are explicitly positioning the purchases around fleet renewal, capacity growth and new routes.

But the wider economic relationship between Bangladesh and the United States provides important context for why an aircraft order of this scale carries significance far beyond Biman itself.

Ordering 25 Boeing aircraft in five months represents an extraordinary change in scale for Biman Bangladesh Airlines.

The most revealing part isn't simply the number of aircraft, but the combination Biman has chosen.

Ten 737-8s provide the tools to renew and expand its regional network. Two additional 787-9s give it greater long-haul capability. And 13 high-capacity 787-10s point towards an airline expecting to carry substantially more passengers on some of its busiest international routes.

There are still plenty of unanswered questions, particularly around exactly where all that additional capacity will be deployed and whether the proposed Airbus order will progress as well.

But one thing is increasingly clear.

The Biman Bangladesh of the 2030s could be a considerably larger and more ambitious airline than the one flying today.