diff --git a/gen/flights/traveltime.py b/gen/flights/traveltime.py
index 2fa05690..6b787f95 100644
--- a/gen/flights/traveltime.py
+++ b/gen/flights/traveltime.py
@@ -52,7 +52,7 @@ class GroundSpeed:
 class TravelTime:
     @staticmethod
     def between_points(a: Point, b: Point, speed: Speed) -> timedelta:
-        error_factor = 1.1
+        error_factor = 1.05
         distance = meters(a.distance_to_point(b))
         return timedelta(hours=distance.nautical_miles / speed.knots * error_factor)