The airline suspended the Newark-New Delhi operations from Friday and has offered "waiver policies" to passengers travelling "to, from or through" Delhi.
ANI news agency quoted a United spokesperson as saying "the airline is monitoring advisories as the region remains under a public health emergency, and are coordinating with respective government agencies".
The United airlines operates Boeing 777 a 267-seated aircraft on the route from Newark to Delhi comprising of 14 hours of journey.
United Airlines on Saturday temporarily suspended its Delhi-bound flights from Newark, USA, citing "poor air quality" - the first cancellation of an global flight after pollution levels rose in the national capital with air quality index reaching the "severe" category. United is the only U.S. airline to offer direct flights to India. To get ahead of this potential issue, we're offering additional flexibility that may allow you to change your travel plans. Tour operators, however, have not seen any cancellations yet, according to Business Standard. "However, there have been no cancellations in bookings", Dipak Deva, managing director of inbound tourism division, Thomas Cook group, told BS. Guests are arriving as per schedule and they move out of Delhi immediately and so there is no cause for concern. "Even domestic tourists are avoiding Delhi".
Over the last week, New Delhi's air quality has dropped to the worst levels of the entire year, over 75 times the World Health Organization's safety levels regarding breathing and health concerns. The levels of PM 2.5 and PM 10, which are ultrafine particulates, remained multiple times above the permissible limits, forcing people to breathe noxious air and triggering health complications.