Why Airlines Still Require Airplane Mode Is Not So Simple

"Please ensure your seats are in the upright position, tray tables stowed, window shades are up, laptops are stored in the overhead bins and electronic devices are set to flight mode." The line runs the same way on nearly every commercial flight, delivered so often that most passengers stop listening halfway through. But the last instruction in that list — flight mode — rests on shakier ground than the rest, according to a commentary published on CNN Travel and produced by The Conversation, a collaboration between journalists and academics.

Writer Doug Drury lays out the rationale for the first four items in plain terms. Window shades stay up so crew and passengers can see outside in an emergency, such as a fire on the wing. Tray tables get stowed and seats come upright so people can move out of a row quickly if evacuation is needed. Laptops go into the overhead bin because a seat-back pocket is not built to hold one in place during a hard landing or turbulence, and a loose laptop can become a projectile. Those explanations track directly to passenger movement and visibility during an emergency.

What Does the Standard Preflight Announcement Actually Cover?

The announcement bundles five distinct instructions into one routine: seat position, tray tables, window shades, laptop storage, and phone mode. The first four, per the CNN Travel piece, connect to a single, testable goal — clearing the cabin fast if something goes wrong. Drury treats those as "reasonable" on their face. The fifth item, switching phones to flight mode, is where the piece pivots. "Mobile phones need to be set to flight mode so they can't cause an emergency for the airplane, right?" Drury writes. "Well, it depends whom you ask."

That line is the hinge of the article: four rules with a clear safety logic, and a fifth rule whose justification is presented as unsettled.

Why Do Airlines Say Phones Must Go Into Flight Mode?

The piece frames the phone rule against how aviation itself communicates. Aircraft navigation and communication systems run on radio services, and those frequencies are coordinated to limit interference between different users of the spectrum, according to the article. The implication is that the flight-mode rule grew out of concern that a cabin full of transmitting phones could, in theory, interfere with the radio bands cockpit systems depend on — not that any specific incident proved it did.

Has Aircraft Technology Changed the Calculus?

Drury's piece opens a section titled "Technology has advanced a great deal," signaling that the case for strict flight-mode enforcement looks different today than it did when the rule was first written. Modern aircraft electronics and modern phone hardware are not the same systems regulators were coordinating around decades ago. The CNN Travel piece does not claim the rule has been formally rewritten as a result; it raises the question of whether the original interference concern still matches current equipment.

Is There Agreement on the Risk Phones Actually Pose?

No. That is the plainest reading of Drury's own framing — "it depends whom you ask" — and the piece does not resolve the dispute into a single verdict. What is documented is a genuine split in how people in aviation and technology fields answer the question, rather than a settled scientific finding one way or the other. The article treats that disagreement as the real story behind a rule most travelers assume is simply a matter of common sense.

What Should Fliers Actually Do Right Now?

Until airlines change the announcement, the instruction stands: phones go into flight mode before departure, alongside upright seats, stowed tray tables, raised window shades, and bagged laptops. The CNN Travel piece does not report any airline dropping the requirement, and it stops short of telling passengers to ignore crew instructions. Its argument is narrower and more useful for understanding the rule than for changing behavior in the moment: four of the five items in the announcement map to a clear evacuation-safety purpose, and the fifth is inherited from radio-spectrum coordination whose relevance to today's devices is, in Drury's telling, still being argued over.

Preflight Checklist, By the Numbers

• 5 distinct instructions in the standard preflight announcement: seat position, tray table, window shade, laptop storage, and electronics/flight mode.
• 2 publication dates on the CNN Travel piece — April 6, 2023, and an April 7, 2023 update — underscoring that the debate over the phone rule predates most current aircraft electronics upgrades.

Timeline

• April 6, 2023: CNN Travel publishes Doug Drury's commentary, produced with The Conversation, questioning the basis for the flight-mode rule.
• April 7, 2023: The piece is updated on CNN's site.

Read the original CNN Travel piece for Drury's full argument on aviation radio coordination and the flight-mode requirement.