diff --git a/src/Constants.js b/src/Constants.js
index 3e665a663..78c79a63d 100644
--- a/src/Constants.js
+++ b/src/Constants.js
@@ -14,6 +14,8 @@ let CONSTANTS = {
     BaseCostFor1GBOfRamServer: 55000, //1 GB of RAM
     BaseCostFor1GBOfRamHacknetNode: 30000,
 
+    TravelCost: 200000,
+
     BaseCostForHacknetNode: 1000,
     BaseCostForHacknetNodeCore: 500000,
 
diff --git a/src/Location.js b/src/Location.js
index 9306c1b41..1f1c60800 100644
--- a/src/Location.js
+++ b/src/Location.js
@@ -1823,32 +1823,32 @@ function initLocationButtons() {
     });
 
     travelToAevum.addEventListener("click", function() {
-        travelBoxCreate(Locations.Aevum, 200000);
+        travelBoxCreate(Locations.Aevum, CONSTANTS.TravelCost);
         return false;
     });
 
     travelToChongqing.addEventListener("click", function() {
-        travelBoxCreate(Locations.Chongqing, 200000);
+        travelBoxCreate(Locations.Chongqing, CONSTANTS.TravelCost);
         return false;
     });
 
     travelToSector12.addEventListener("click", function() {
-        travelBoxCreate(Locations.Sector12, 200000);
+        travelBoxCreate(Locations.Sector12, CONSTANTS.TravelCost);
         return false;
     });
 
     travelToNewTokyo.addEventListener("click", function() {
-        travelBoxCreate(Locations.NewTokyo, 200000);
+        travelBoxCreate(Locations.NewTokyo, CONSTANTS.TravelCost);
         return false;
     });
 
     travelToIshima.addEventListener("click", function() {
-        travelBoxCreate(Locations.Ishima, 200000);
+        travelBoxCreate(Locations.Ishima, CONSTANTS.TravelCost);
         return false;
     });
 
     travelToVolhaven.addEventListener("click", function() {
-        travelBoxCreate(Locations.Volhaven, 200000);
+        travelBoxCreate(Locations.Volhaven, CONSTANTS.TravelCost);
         return false;
     });
 
diff --git a/src/NetscriptFunctions.js b/src/NetscriptFunctions.js
index 469d1c0ba..75334c699 100644
--- a/src/NetscriptFunctions.js
+++ b/src/NetscriptFunctions.js
@@ -2473,7 +2473,11 @@ function NetscriptFunctions(workerScript) {
                 case Locations.NewTokyo:
                 case Locations.Ishima:
                 case Locations.Volhaven:
-                    Player.loseMoney(200000);
+                    if(Player.money.lt(CONSTANTS.TravelCost)) {
+                        workerScript.scriptRef.log("ERROR: not enough money to travel with travelToCity().");
+                        throw makeRuntimeRejectMsg(workerScript, "ERROR: not enough money to travel with travelToCity().");
+                    }
+                    Player.loseMoney(CONSTANTS.TravelCost);
                     Player.city = cityname;
                     Player.gainIntelligenceExp(CONSTANTS.IntelligenceSingFnBaseExpGain);
                     if (workerScript.disableLogs.ALL == null && workerScript.disableLogs.travelToCity == null) {