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DCA to London fares have a $290 median over the last 30 days; the middle half sat tightly between $285-$296.
Written from this route's 30-day price index (30 daily samples). Article last regenerated Nov 7, 2026.
See full numbers and stats on the DCA → LHR price history page.
The data shows a fairly stable pricing picture for Washington–London: the median cached fare was $290, and the middle half of all sampled fares landed in a narrow $285–$296 band. That's a tight cluster for a transatlantic route, suggesting that whatever date you check within a typical booking window, you're likely to see something close to $290 rather than wild swings.
The listed spread percentage of 45% looks large on paper, but it's driven by a single low outlier at $223 against a high of $323 — a $100 gap on an otherwise consistent fare base. Since the p25–p75 range is so narrow, the practical takeaway is that most days price similarly, and the occasional sub-$250 fare is the exception worth watching for rather than something to plan around. We don't have enough resolution in this data to say when in the booking horizon — weeks versus months out — those dips tend to appear, so we can't responsibly tell you to wait for one.
We also don't have carrier-level detail in this sample, so no airline or day-of-week pattern can be confirmed here. Travelers should treat $290 as a reasonable benchmark fare for this route and view anything notably under $285 as a good deal worth booking quickly, given how rarely fares seem to drop below that range. The caveat: this is a 30-day snapshot, not a seasonal or year-round view, so prices could shift with holidays, fuel costs, or schedule changes outside this window.
Why we regenerated this article: Median fare ↓ 8% ($316 → $290). We only rewrite when the underlying price index actually moves — stable weeks keep the previous take.
AI-authored from this route's 30-day price index. Article last regenerated Nov 7, 2026. Fares shift continuously — confirm at booking.