SSSS code on boarding pass means you'll be delayed, but you can avoid it

Experts have explained why a four-letter code on your boarding pass means you are about to be delayed at the airport and how you can try to avoid it. Travellers have been left confused by the ‘SSSS’ stamp on boarding passes, with thousands hitting Google to find out what it means.

Experts at Travel Republic have revealed why the stamp appears on selected boarding passes, and how to avoid unnecessary stress at the airport. The “SSSS” stamp stands for Secondary Security Screening Selection, meaning the passenger has been flagged for additional security checks before boarding. This can involve extra bag searches, hand swabs, and questioning, leading to potential delays at the airport.

The security process primarily applies to flights to or within the United States, but it’s not exclusive to U.S. travel. One coupel recently shared their expetience after one of them was mysteriously pulled aside for additional screening thanks to the “SSSS” mark on their boarding pass.

Content creator Jordyn Verzera, shared her unexpected airport ordeal after noticing the stamp on her ticket. The “SSSS” code meant she had to undergo extra security checks, leading to a frantic bag search, swabs, and, ultimately, an unexpected separation from her boyfriend before their flight.

Others could relate all too well. One said: “Me and my BF both got SSSS”. Another added: “This happened to my dad—we were delayed forever!” and a third said: “I always get that since I was little, so we arrive two hours early just in case.”

The exact selection process remains somewhat of a mystery, but it’s typically linked to random selection, travel history, last-minute bookings, one-way flights, or international travel to certain destinations.

Those with mismatched travel details or frequent flyer activity that raises flags may also be more likely to receive the stamp.

If passengers aren't prepared, the four-letter code can lead to longer airport delays, extra bag searches, and even missed flights. Holiday experts at Travel Republic have revealed top tips to get through the additional security screening with minimal hassle:

1. Arrive early – Additional screening can take anywhere from 10 minutes to over an hour, so allow extra time before your flight.
2. Be cooperative – Security checks can feel frustrating, but staying calm and following instructions can speed things up.
3. Have documents ready – Keep your boarding pass and passport easily accessible for multiple checks.
4. Know what to expect – You’ll likely face extra bag searches, hand swabs, and possible questioning, so don’t be caught off guard.
5. Pack hand luggage appropriately – Ensure your bag is security-compliant and easy to search by using clear pouches for liquids, keeping electronics accessible, and avoiding overpacked luggage.

By preparing in advance, you can avoid unnecessary delays and make your journey through security as stress-free as possible.