Air Defense is one of the most popular and powerful defenses in Clash of Clans.
Currently, there are fifteen levels available for this defense.
And, it takes quite a lot of time for a player to upgrade it as the gold cost is high and the upgrade takes a week or more than a week to complete.
It is quite common for players to forget about the upgrade cost of Air Defense and their corresponding upgrade time.
To solve that issue, I've come up with this article!
In this article, I've listed the upgrade cost, and upgrade time of Air Defense in Clash of Clans.
I've done all the math required so that you don't have to!
So, without any further ado, let's dive right into it!
Just a quick note: I've written articles where I've listed the upgrade cost, and the corresponding upgrade time of everything available in Clash of Clans. You can check them out here!
Air Defense Upgrade Cost and Upgrade Time in Clash of Clans
I've organized the entire data in a table.
Moreover, to make sure that everything is easy to read and understand, I've also written the data in text in an organized manner.
The following table displays the upgrade cost, and upgrade time of Air Defense in the game:
| Air Defense Level | Upgrade Cost (gold) | Upgrade Time |
|---|---|---|
| 1 | 22,000 | 1 hour |
| 1 to 2 | 90,000 | 2 hours |
| 2 to 3 | 210,000 | 6 hours |
| 3 to 4 | 500,000 | 12 hours |
| 4 to 5 | 800,000 | 18 hours |
| 5 to 6 | 1,000,000 | 1 day |
| 6 to 7 | 1,750,000 | 2 days |
| 7 to 8 | 2,300,000 | 2 days 12 hours |
| 8 to 9 | 3,400,000 | 3 days |
| 9 to 10 | 5,000,000 | 4 days |
| 10 to 11 | 5,600,000 | 4 days 12 hours |
| 11 to 12 | 6,500,000 | 5 days |
| 12 to 13 | 8,000,000 | 6 days |
| 13 to 14 | 9,000,000 | 7 days |
| 14 to 15 | 21,000,000 | 15 days 16 hours |
The data in the above table can be interpreted as:
- You'll require 22,000 gold to build a level 1 Air Defense. It will be built in 1 hour.
- To upgrade a level 1 Air Defense to level 2, you'll need 90,000 gold. The upgrade gets completed in 2 hours.
- Upgrading a level 2 Air Defense to level 3 requires 210,000 gold. And, the upgrade takes 6 hours to complete.
- To upgrade an Air Defense from level 3 to level 4, you'll require 500,000 gold. The upgrade will take 12 hours to complete.
- Upgrading an Air Defense from level 4 to level 5 will require 800,000 gold. And, the upgrade gets completed in 18 hours.
- To upgrade an Air Defense from level 5 to level 6, you'll require 1,000,000 gold. The upgrade will take 1 day to complete.
- Upgrading an Air Defense from level 6 to level 7 requires 1,750,000 gold. And, the upgrade gets completed in 2 days.
- To upgrade an Air Defense from level 7 to level 8, you'll require 2,300,000 gold. The upgrade will take 2 days 12 hours to complete.
- Upgrading an Air Defense from level 8 to level 9 requires 3,400,000 gold. And, the upgrade gets completed in 3 days.
- To upgrade an Air Defense from level 9 to level 10, you'll require 5,000,000 gold. The upgrade will take 4 days to complete.
- Upgrading an Air Defense from level 10 to level 11 requires 5,600,000 gold. And, the upgrade gets completed in 4 days 12 hours.
- To upgrade an Air Defense from level 11 to level 12, you'll require 6,500,000 gold. The upgrade will take 5 days to complete.
- Upgrading an Air Defense from level 12 to level 13 requires 8,000,000 gold. And, the upgrade gets completed in 6 days.
- To upgrade an Air Defense from level 13 to level 14, you'll require 9,000,000 gold. The upgrade will take 7 days to complete.
- To max out your Air Defense by upgrading it from level 14 to level 15, you will need 21,000,000 gold and 15 days 16 hours of time!
Conclusion
In this article, I've listed the upgrade cost of Air Defense along with the corresponding upgrade time.
I'll also update the data in this article if any numbers change in the game in the future.
Also, please note: I've updated the data in this post. The entire data in this post is up-to-date as of 2 October 2025.
To max out the Air Defense quickly and efficiently, you should use mainly farming attack strategies to arrange for the gold required for the upgrades.
Now, I'd like to hear from you:
Have you already maxed out the Air Defense in your base? If not, what's the current level of the Air Defense?
Or, you might have a question.
Either way, feel free to let me know by dropping down a comment below!
I've also written an article in which I've listed the upgrade cost along with the corresponding upgrade time of Inferno Tower in Clash of Clans. You can read it here.
Cheers,
Raj Oberoi