diff --git a/src/features/online-board/url.ts b/src/features/online-board/url.ts
index 47fb6f30..c4010832 100644
--- a/src/features/online-board/url.ts
+++ b/src/features/online-board/url.ts
@@ -130,7 +130,12 @@ export function buildFlightUrlParams(id: IParsedFlightId): string {
   // Angular truncation: take last 5 chars of (number + suffix) to cap length
   const combined = `${paddedNumber}${suffix}`.slice(-5);
 
-  return `${id.carrier}${combined}-${id.date}`;
+  // The flight's API date may arrive dashed (yyyy-MM-dd from real payloads)
+  // or compact (yyyyMMdd from our own URL parser). Normalise to compact so
+  // the resulting URL always matches the route pattern.
+  const compactDate = id.date.replace(/-/g, "");
+
+  return `${id.carrier}${combined}-${compactDate}`;
 }
 
 /**