Fliers can now use a new feature in the United mobile app to request their preferred seat for free and automatically get moved if one opens up. In July alone, United switched 18K+ passengers to their preferred seat – nearly 40% of eligible passengers.

 Here's how it works:

• Request your desired seat in the mobile app if your preferred seat type isn't available at the time of booking your flight.
• Select where you'd like to sit, including preferences for window or aisle seats, exit rows or bulkhead seats.
• Get automatically assigned and notified about your new seat assignment if your preferred choice becomes available.

 With up to 3 million users interacting with the United mobile app daily, United is continuing to bring useful features to its app, and this is just the latest new app feature that gives customers more options and makes travel a breeze. United is the first and only U.S. airline to offer the seat preference app feature. For more information, download the United mobile app here, and see here for visual assets.