Can You Bring Surströmming On A Plane? | The Stinky Truth

Surströmming is known for its intense fermented smell. The canned Swedish herring continues to ferment inside the tin, building up serious internal pressure over time. That pressure is what makes opening the can an outdoor-only activity in Sweden.

The same pressure makes surströmming a genuine safety hazard inside an airplane. When cabin altitude changes, the pressure differential can cause the can to burst. The question of Can You Bring Surströmming On A Plane gets a hard no from both the TSA and most international airlines. This article explains why the ban exists and how the rules apply to your luggage.

The Explosive Reason Behind The Ban

The main reason airlines and security agencies ban surströmming is physical safety. The cans are under high internal pressure due to ongoing fermentation. Changes in altitude upset the pressure balance, which can make the metal can buckle or burst open.

The hazard applies in both the cabin and the cargo hold. A burst can in the passenger cabin would be disruptive and create a strong odor. In the cargo hold, leaking fish brine can ruin other bags and require the aircraft to be taken out of service for cleaning.

The TSA classifies surströmming under general rules for liquids and gels. Any food item over 3.4 ounces that is liquid or semi-liquid cannot pass through a security checkpoint in a carry-on bag. Since the can contains brine, it fails this test for the common 14-ounce size.

Why Airlines Draw A Hard Line

Vacuum-sealed foods are usually fine to fly with. Surströmming is a specific exception that airlines treat seriously. The reasons go beyond just the smell.

• Risk of explosion: The primary driver of the ban is the physical bursting risk. Cans carried by passengers have been known to rupture when exposed to rapid pressure changes at altitude, creating a genuine safety concern.
• The TSA liquid rule: Surströmming is packed in brine. Standard TSA rules state any liquid or gel food over 3.4 ounces cannot go in a carry-on bag. This alone blocks most standard cans from the cabin.
• Overwhelming odor: The smell of surströmming has been compared to old garbage or rotten eggs. If a can bursts during a flight, the odor can contaminate the entire cabin and cause a major cleaning issue.
• Airline-specific policies: After a few notable incidents, major carriers like British Airways, Air France, Finnair, and KLM enacted explicit bans on surströmming in 2006. These policies remain active today.
• Check-in screening: Even if a can is packed in a checked bag, airline staff are trained to identify hazardous food items. A recognizable surströmming tin is likely to be flagged and removed before the flight.

These factors stack together to make surströmming effectively impossible to transport by air in either carry-on or checked luggage. The policies exist to prevent a single can from disrupting an entire flight.

The Official TSA Position On Fermented Fish

The TSA website lets you check whether an item is allowed before you pack it. Surströmming is not listed by name, but the rules for food items and pressurized containers apply directly to the question.

Any container with liquid or gel contents over 3.4 ounces must go in checked luggage, and the TSA gives its officers final authority on whether an item like fermented Swedish herring is acceptable. Most standard cans fail on size alone.

The table shows that surströmming hits two barriers. It fails the TSA liquid test for carry-ons, and it triggers airline hazardous material policies for checked bags.

What Happens If You Try To Pack It

Trying to pack surströmming in your bag usually ends in predictable ways. Here is the typical outcome at the airport.

1. It gets flagged at security: The dense metal can and liquid contents will show up clearly on the X-ray scanner. The TSA officer will pull the bag for inspection and likely confiscate the item.
2. Airlines refuse it at check-in: Even if you hide it in a checked bag, the check-in agent may recognize the brand or can shape. Many airline manuals specifically list surströmming as a prohibited item in checked luggage.
3. You risk a delayed flight: If a can is found during boarding or on the plane itself, the crew will remove it. The bag may need to be offloaded and searched, which can delay the departure.
4. You lose the souvenir: Confiscated surströmming is thrown away. There is no compensation for the cost of the can, and you will not get it back after the flight.

The safest move is to enjoy the delicacy in Sweden. If you need to bring a can home, ground shipping is a better alternative than trying to fly with it.

The Notable History Of Airline Restrictions

The coordinated airline ban on surströmming took shape in the 2000s. A few incidents involving pressurized cans prompted carriers to take action against the fermented fish.

Per the detailed overview of airlines banned surströmming on Wikipedia, the main wave of restrictions hit in April 2006. Air France, British Airways, Finnair, and KLM all issued specific prohibitions against the cans.

The ban was so complete that Stockholm Arlanda Airport stopped selling surströmming in its shops entirely. This prevented passengers from buying a can at the terminal and attempting to board with it.

The Bottom Line

Surströmming is a cultural experience best enjoyed in a park, not a plane. The pressurized cans pose a real bursting risk, and the smell of a rupture can ruin an entire cabin. TSA rules and airline policies combine to make it effectively impossible to bring as a carry-on or checked item.

If you want to sample this famous fermented fish, do it before you head to the airport. For specific questions about transporting unusual food items, check with your airline’s baggage department directly before your trip.