British Airways OSL Terminal About 50 kilometers north of Oslo's downtown is Oslo Airport Gardermoen (OSL), home of British Airways. A variety of services are available to travelers flying to different foreign destinations from the British Airways terminal. Modern conveniences for travelers include duty-free shopping, dining alternatives, and cozy seating places. Reputable for its dedication to providing excellent customer service, British Airways guarantees a seamless journey from check-in to boarding. The OSL terminal provides an easy starting point for British Airways passengers, with regular flights to London and other major destinations.