Thai air carrier Nok Air has signed an order worth some $1.45 billion at list prices for eight Boeing 737 Next Generation airliners and seven of the upcoming 737 Max jets.
The airline said it may convert one of the 737-800 orders to a 737 Max 8 sometime in the future.
The airliners will be built in Boeing's Renton plant.
The 737s ordered this week are the first 737 aircraft Nok Air has ordered directly from Boeing. The airline operates 15 leased Boeing Next Generation 737s.
The Nok Air order raises the total 737 Max orders to 2017 from 40 customers. The 737 Max is the next version of the 737. It will be equipped with new engines, an improved cockpit and interior and aerodynamic enhancements designed to cut fuel consumption.
The 737 Max is the rival of Airbus' updated A320neo family of single-aisle planes. The first 737 Max is due to enter airline service with Southwest Airlines in 2017.