What does Airplane mode do? And will it save battery life?

Airplane mode, available on most modern devices, disables wireless communication to prevent interference with an aircraft’s navigation and communication systems. Here’s a detailed look at its functionality, benefits, and usage tips.

How Airplane Mode Works

Some devices block all cellular, WiFi, and Bluetooth connections when airplane mode is enabled. Others allow you to manually re-enable Bluetooth and WiFi while keeping cellular signals off. Even with wireless functions limited, you can still edit documents, view photos, and play locally stored music or videos. And yes, you can connect Bluetooth headphones while in airplane mode.  

Why Is Airplane Mode Required During Flights?

By activating airplane mode, you’re helping the flight crew and fellow passengers by ensuring your device doesn’t interfere with onboard systems. Collins explains: “Airlines request passengers to use airplane mode to avoid signal disruption. Aircraft rely on advanced navigation and communication systems, which operate on frequencies that can be affected by mobile phones. By switching to airplane mode, you minimise the risk of interference.”  

What Are the Risks of Ignoring Airplane Mode?

Although modern aircraft are well-shielded, interference remains a concern. From 2003 to 2009, the U.S. recorded 75 instances of suspected electronic interference across 283,300 flights. While no accidents have been definitively linked to mobile phones, compliance with regulations is essential. At cruising altitude, your device is too high to connect reliably to cell towers, so enabling airplane mode has no real downside.  

How to Enable Airplane Mode

On iPhone:

1. Open Control Centre.
2. Tap the airplane icon to turn it on/off.

To sync airplane mode with your Apple Watch:

• Open the Apple Watch app on your iPhone.
• Navigate to General > Airplane Mode > Mirror iPhone.

On Android:

1. Open the Settings app.
2. Go to Network & Internet.
3. Toggle Airplane Mode on/off.

In-Flight WiFi Access

Although cellular service is unavailable, many airlines provide WiFi for messaging and browsing. Most WiFi services activate above 10,000 feet, after takeoff. WiFi Options by Airline:

• Delta Air Lines: Free for SkyMiles members on most domestic flights. Use the Delta app to check availability.
• American Airlines: WiFi passes cost $10–$20 per flight, with subscriptions available from $49.95/month.
• United Airlines: Rates start at $10 per flight or $8 for MileagePlus members. Monthly plans are available for $49 or 7,500 miles.
• Southwest Airlines: WiFi is available for $8 per device or free for A-List Preferred Members.

Does Airplane Mode Save Battery?

Airplane mode can significantly extend your device’s battery life by cutting off power-intensive wireless functions. Collins states: “Airplane mode conserves battery as phones use significant power to maintain network connections. Switching to this mode helps your device last longer, especially when charging options are unavailable.” A test by Wirecutter in 2016 found that browsing media in airplane mode drained only a few percentage points of battery over four hours, compared to up to 10% with wireless functions enabled. For situations where power is limited or interruptions are unwelcome—such as on flights or in cinemas—airplane mode is an ideal solution. Just remember it disables cellular data, so communication services won’t work.