2Ku and Ku mentioned below are satellite based and work over the ocean. 2Ku uses two antennas to improve throughput.

https://www.delta.com/us/en/delta-ex...n-flight-wi-fi

2KU | NEXT GENERATION TECHNOLOGY

We’re bringing at-home Wi-Fi speed and reliability to the air with 2Ku, from GogoŽ. That means whether you’re streaming video, working remotely or simply browsing the web, you can enjoy industry-leading Wi-Fi speeds on your flight. 2Ku also offers continuous connectivity from pushback to park on nearly all flights.

Available on:

737-800, 737-900, 757-200*, 757-300, A220, A319, A320, A321, A330-900 and A350

KU | WI-FI ON LONG-HAUL INTERNATIONAL FLIGHTS

Ku technology offers global coverage on 100% of our long-haul international flights, enabling you to stay connected at 10,000 feet and beyond and over water.

Available on:

A330-200, A330-300, 757-200*, 767-300, 767-400

*Select Aircraft

ATG | AIR TO GROUND ON SHORT–HAUL FLIGHTS

Air-to-Ground Wi-Fi technology is available on our short-haul flights enabling you to stay connected at 10,000 feet and beyond on the following aircraft types.

Available on:

CRJ-700, CRJ-900, E-170, E-175 and 717