United also allows breastfeeding while in flight, and provides useful information on its website:
Nursing mothers are welcome to breastfeed or pump on our aircraft and in our facilities. Dedicated nursing spaces, including nursing mother rooms and Mamava nursing pods, are available in many of our airports and we are in the process of adding more. You can locate nursing spaces by using the airport maps feature in the United app or by visiting the airport's website. In addition, some of our United Clubâ„ locations have family rooms available for our United Club members and customers who purchase a one-day pass.
If you will need to pump, we recommend bringing a battery-operated or manual breast pump, since the availability of in-flight seat power varies by aircraft fleet. Breast pumps and milk may be carried on board in addition to the one carry-on bag and one personal item allowed.
You are welcome to breastfeed from the comfort of your seat or in a lavatory, but due to the unpredictability of turbulence, nursing mothers are not allowed to pump in the aircraft galley areas or jump seats. Our flight attendants may be able to provide ice to keep pumped milk cool during a flight, but they are not permitted to store items such as milk or formula.