Low-cost challenger Norwegian has pushed on with its transatlantic focus, announcing the launch of new low-cost flights to Seattle and Denver from Gatwick Airport.
Fares will start from £199 with the routes taking off from September this year.
The low-cost carrier announced 10 new transatlantic routes in February with fares starting at £69 for a one-way ticket, ramping up pressure on US and European rivals to compete.
The new Denver route will start on 16 September, operating a twice-weekly service on Tuesday and Saturday during the summer, rising to three during the winter, and running all year round.
From 17 September, the low-cost carrier will start its service to Seattle-Tacoma International Airport with four weekly flights, also running all-year round.
Passengers will be able to opt for a modern economy cabin or a premium cabin offering more legroom, a complimentary meal and bigger baggage allowance from £599.90.
Thomas Ramdahl, chief commercial officer at Norwegian said:
Our new Seattle and Denver routes reflect the huge consumer demand on both sides of the Atlantic for affordable long-haul travel.
With our USA flights over 90 per cent full, we are excited to add Seattle to our growing list of US destinations while breaking the monopoly on UK flights to Denver.
Gatwick's chief commercial officer Guy Stephenson said both US locations were appealing for leisure and business travellers.
"Crucially, both cities are prominent business centres known for their hi-tech and advanced manufacturing industries," he said. "Both are also gateways for trade across the US so this new connectivity comes at an important time for UK businesses, including those that export cargo."
It marks the airline's latest push into low-cost transatlantic routes, after British Airways' parent company IAG recently revealed a new long-haul, low-cost addition to its ranks called Level. It will offer cheap flights initially from Barcelona.