Complimentary Meal Service is available in Economy for the following:
- Trans-Atlantic flights
- Trans-Pacific flights
- Intra-Pacific/Oceania/Micronesia flights, except between Guam and Honolulu
- South American flights
Buy on Board only is featured in Economy for the following:
- North American flights (all 50 US States, Canada, and Mexico)
- Intra-Pacific flights between Guam and Honolulu
- Caribbean and Latin America flights (not South America)
Here's United's official page on Economy Class dining:
https://www.united.com/web/en-US/con...my/dining.aspx
For the curious folks, the 2016 thread is here:
2016 Let's Eat - Economy Class (Domestic & International)
With that, Let's Eat 2017!