Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.TSA PreCheck continues to make itself more valuable for travelers by adding additional airlines to the program. On Wednesday, the Transportation Security Administration announced that it’s adding an additional six international airlines.The six new partnering airlines include:Air SerbiaCondor AirlinesPorter AirlinesScandinavian AirlinesThomas Cook Airlines (UK)Thomas Cook Airlines (Scandinavia)With Wednesday’s announcement, a total of 52 domestic and international airlines offer PreCheck as an option to passengers. All of the major US carriers now participate in the program, which offers expedited screening, including not needing to remove shoes and laptops from bags, at more than 200 airports around the country. Some US territories, such as Puerto Rico and Guam, also offer PreCheck for eligible passengers.While there are many airlines that now offer PreCheck to passengers departing the US, there are still some exceptions, such as if your boarding pass is tagged with the dreaded Secondary Security Screening Selection (SSSS). That being said, PreCheck is worth having — especially knowing that it comes for free with a fee credit from several credit cards.