The United States government regularly publishes travel advisories for destinations worldwide. Some countries receive the highest warning level — Level 4: Do Not Travel — meaning Americans are advised to avoid visiting them entirely.

With tensions rising in several parts of the world, including conflicts involving Iran and other regions, it’s a good time for travelers to understand which destinations fall into this category.

What Does “Level 4: Do Not Travel” Mean?

A Level 4 advisory is the most serious travel warning issued by the U.S. Department of State. It signals that visiting the country could involve serious or life-threatening risks.

These warnings may be issued because of factors such as:

Armed conflict or civil unrest

High levels of crime

Terrorism threats

Health emergencies

Natural disasters

Risks of kidnapping or wrongful detention

Travel advisories are reviewed regularly. The State Department typically re-examines Level 3 and Level 4 warnings every six months, while lower-level advisories are reassessed annually.

Countries Currently Under a Level 4 Advisory

As of 2026, 22 countries or regions are classified as Level 4, meaning the U.S. government strongly recommends avoiding travel to them.

These destinations are:

Afghanistan

Belarus

Burkina Faso

Myanmar (Burma)

Central African Republic

Gaza (Palestinian Territories)

Haiti

Iran

Iraq

Lebanon

Libya

Mali

Niger

North Korea

Russia

Somalia

South Sudan

Sudan

Syria

Ukraine

Venezuela

Yemen

Many of these places face ongoing conflict, political instability, or serious safety concerns, making them particularly risky for international visitors.

Other Countries With Elevated Warnings

Not every country with safety concerns is at Level 4. Some destinations receive a Level 3 advisory, which means travelers should reconsider visiting due to potential dangers.

These warnings can change rapidly in response to global events, political developments, or security conditions.

Why It’s Important to Monitor Travel Advisories

Even if you don’t plan on visiting high-risk destinations, travel advisories can shift rapidly. Political tensions, conflicts, or natural disasters can quickly change the safety situation in a region.

For travelers, staying informed is one of the best ways to avoid unnecessary risk. Checking official government guidance before planning a trip helps ensure your destination remains safe and accessible.

And if your dream vacation happens to include somewhere currently listed under Level 4, it might be wise to rethink your plans — or at least keep a close eye on future updates.