Set the flight airfields based on the Squadron.

game/commander/packagebuilder.py

@@ -54,8 +54,6 @@ class PackageBuilder:
             plan.num_aircraft,
             plan.task,
             start_type,
-            departure=airfield,
-            arrival=airfield,
             divert=self.find_divert_field(squadron.aircraft, airfield),
         )
         self.package.add_flight(flight)

game/squadrons/squadron.py

@@ -308,6 +308,10 @@ class Squadron:
     def expected_size_next_turn(self) -> int:
         return self.owned_aircraft + self.pending_deliveries
 
+    @property
+    def arrival(self) -> ControlPoint:
+        return self.location if self.destination is None else self.destination
+
     def plan_relocation(self, destination: ControlPoint) -> None:
         if destination == self.location:
             logging.warning(

game/transfers.py

@@ -360,8 +360,6 @@ class AirliftPlanner:
             flight_size,
             FlightType.TRANSPORT,
             start_type,
-            departure=squadron.location,
-            arrival=squadron.location,
             divert=None,
             cargo=transfer,
         )