Travel experts reveal why you never want to see these four letters printed on your boarding pass

Travelers pinch a uncommon 'SSSS' connected their level tickets should hole for a perchance bumpy business earlier boarding their flight, experts person warned.

The frightening 'SSSS,' known formally arsenic secondary information surface selection, tin origin complications earlier going to a formation gate.

'SSSS are so 4 dreaded letters that nary traveler should want to spot on,' elder aviation writer Zach Griff said this period to Fox News Digital.

Griff explained 'SSSS' was 'a measurement implemented by information authorities successful nan US to surface definite passengers pinch further checks.'

'Selectees for this enhanced information are chosen successful nan days starring up to a formation erstwhile airlines stock nan manifest pinch US information authorities,' Griff added.

The 'SSSS' printed connected a traveler's boarding walk intends that fliers are required to spell done other screening by nan Transportation Security Administration (TSA).

Some of these other information measures see pat-downs, other luggage inspection, and imaginable explosive residue swabs.

Fliers could find 'SSSS' connected nan boarding tickets for nary reason, and the Department of Homeland Security website explained they 'cannot beryllium disclosed' for information purposes.

Certain things for illustration random selection, booking one-way tickets, purchasing boarding passes utilizing cash, aliases walking to a red-flag destination could beryllium reddish flags, according to The Points Guy. 

Griff explained that 'SSSS' connected tickets person besides caused astir fliers to 'not beryllium capable to cheque successful online' and would besides 'receive a printed summons from an agent.'

Various travelers person gone done this experience, including Jordyn Verzera and JT Mocarsk.

Verzera, who's known arsenic nan 'face down The Mobile Homie' recreation blog, recalled a rocky airdrome incident aft seeing 'SSSS' connected her boarding pass.

The recreation master explained her caller acquisition pinch nan further screening process pinch Fox News Digital this month. 

Versera revealed she was not capable to get her boarding walk connected an hose app and needed to speak pinch a gross agent.

'They had to springiness maine a printed boarding pass,' Verzera told Fox News Digital.

'He [Mocarski] could still usage his integer one, and past I had to transportation this walk around.'

The blogger added nan 'SSSS' connected her summons was 'marked and circled' and needed to show her boarding walk 'every measurement of nan way.'

'Instead of conscionable going done 1 shape of security… you had to get to nan gross early, and they did an extra-deep screening erstwhile you departed,' Verzera said. 

'But wherever nan large point was, is, erstwhile we arrived, we really ended up having to spell done customs… and that was erstwhile nan really heavy hunt began.'

Verzera was forced to region everything from her luggage, including toiletry items. 

Airport officials besides requested she move connected her laptop and spot each her unpacked items onto a conveyor loop to beryllium swabbed.

She arrived astatine nan airdrome early to person her boarding walk aft spotting an 'SSSS' again, but was forced to hold 3 hours successful statement for nan ticket.

Once Verzera sewage her ticket, she waited different hr to spell done information screenings astatine customs.

Mocarski sewage fortunate aft uncovering an 'SSSS' connected his boarding walk successful Rome, Italy, and revealed his acquisition was faster than Verzera's.

Mocarski claimed nan 'SSSS' matter depends connected nan state aliases wherever nan traveler is going and what nan hunt entails, while speaking pinch Fox News Digital.

Griff agreed pinch nan recreation enthusiast, and that immoderate airports whitethorn require 'more screening' and a 'personalized interview.'

Mocarski yet understood why TSA were implementing 'SSSS' connected random boarding passes and that staying calm and respecting agents would help.

He and Verzera besides suggested fliers acquisition traveler security erstwhile selecting their flights.

A TSA spokesperson explained nan 'SSSS' connected boarding tickets are meant to thief nan 'transportation information mission' successful an email to Fox Digital News.

'Security measures statesman agelong earlier passengers get astatine nan airport,' nan TSA spokesperson wrote. 

They continued nan mentation by penning nan further information measures are successful spot 'from nan clip passengers get to nan airdrome until they get astatine their destination.' 

The spokesperson besides confirmed passengers are 'randomly selected for enhanced screening.'

The dreaded 'SSSS' connected boarding passes are unavoidable, meaning fliers who spot nan unfortunate missive will person nary prime but to acquisition nan other information measures.