US regional carrier SkyWest Airlines has ordered 25 Embraer 175s, of which 15 will initially be configured with 70 seats.
These 15 aircraft – which Embraer has designated as the 175SC, for "special configuration" – can be retrofitted to 76 seats if needed.
The remaining 10 aircraft will be fitted with 76 seats, in line with previous SkyWest layouts.
Embraer says the aircraft will be listed in its backlog for the third quarter.
It states that all of the jets are due to be delivered in 2018. It values the agreement at $1.1 billion at catalogue prices.