The Seattle-based airline also holds options for an additional 15 aeroplanes which, if exercised, would increase the order value by $983 million. Alaska Airlines also took purchase rights for another 50 aeroplanes, making this among the largest orders for 737-800s.
Three of the 35 aeroplanes announced yesterday were booked earlier this year, with the airline unidentified on the Boeing Orders & Deliveries website.
All the aeroplanes on firm order are to be delivered between 2006 and 2011.
Boeing claims the Next-Generation 737 flies 305 nautical miles further, and has operating costs that are four to 10 percent lower, than the Airbus A320.