diff --git a/src/features/online-board/components/DayTabs/DayTabs.tsx b/src/features/online-board/components/DayTabs/DayTabs.tsx
index 4aef556c..c24f7830 100644
--- a/src/features/online-board/components/DayTabs/DayTabs.tsx
+++ b/src/features/online-board/components/DayTabs/DayTabs.tsx
@@ -39,7 +39,12 @@ export const DayTabs: FC<DayTabsProps> = ({
 
   const [currentPage, setCurrentPage] = useState(initialPage);
 
+  // Empty availableDates means the calendar API hasn't resolved yet (or
+  // the route has no day data). Treat every date as tappable in that
+  // case — matches Angular where the tabs stay enabled until we *know*
+  // the upstream reports no flights for a given day.
   const availableSet = useMemo(() => new Set(availableDates), [availableDates]);
+  const disableByAvailability = availableDates.length > 0;
 
   const visibleDates = allDates.slice(
     currentPage * PAGE_SIZE,
@@ -68,7 +73,7 @@ export const DayTabs: FC<DayTabsProps> = ({
               key={date}
               date={date}
               isActive={date === selectedDate}
-              isDisabled={!availableSet.has(date)}
+              isDisabled={disableByAvailability && !availableSet.has(date)}
               locale={locale}
               onClick={onNavigate}
             />