Reach us by phone Find contact numbers if you'd like to speak directly to a United Airlines customer service representative. Looking for United Airlines Phone Number? United offers some of the lowest fares on one-way and round-trip flights from United States to many locations. We’re also proud to provide flexible booking options so you can find the best price on cheap flights that work within your schedule. Add in free 24 hour cancellation on most flights and you’ll be able to book your next trip with confidence. Fly from United States International Airport on United Airlines with the help of United to spend less time worrying about finding the best deal and more time enjoying!