Every Oslo–Washington fare we track, measured against the route's typical price whenever there is enough cached history to build one. Subscribe in any RSS reader for free single-route price alerts — no account, no email needed.https://flight.dealsen-ushttps://flight.deals/flights/oslo-to-washington/#2026-09-04-2026-09-10-BAhttps://flight.deals/flights/oslo-to-washington/#2026-09-04-2026-09-10-BAOSL → WAS round-trip on British Airways, 2026-09-04 to 2026-09-10 (6 nights). Cached fare $528. Not enough cached history on this route yet to say what it usually costs.Wed, 05 Aug 2026 11:31:58 GMT