We're all for being comfortable on a flight, but since you do have to be out in public, it's best not to wear pajamas to the airport and onto the plane. Instead, wear loose-fitting, comfortable pants with an elastic band, said Susan Fogwell, a former flight attendant with 22 years of experience.

While there is no official federal or airline "dress code" that explicitly prohibits pajamas at the airport, whether you should wear them is a matter of personal comfort versus social norms and security practicalities. In 2026, "athleisure" and extremely casual wear have become standard at airports, and you will certainly see passengers in sweatpants or matching lounge sets. However, traditional sleepwear—like silk robes or flannel nightgowns—may draw unwanted attention or lead to more intensive security screenings. From a practical standpoint, airports can be cold, and airplane seats are not always the most hygienic, so many travelers prefer breathable leggings or joggers that provide "pajama-level" comfort while looking more "put-together." Additionally, if you are hoping for an upgrade or traveling on a "buddy pass," gate agents still adhere to unofficial grooming standards and may deny perks to those in sleepwear. If you do choose to wear pajamas, ensure they are modest and lack excessive metal details (like zippers or heavy buttons) that could trigger the TSA metal detectors and slow down your journey.