Earn Miles: There are numerous ways to earn miles by Mileage Plus members. You can earn miles whenever you book a flight with United Airlines or Star Alliance Airlines. You are advices to present your membership number at the time of flight booking. You should also produce Mileage Plus membership card at check-in time. You will earn miles against your air travel. You can check if your account is updated with earned miles. Other options include stay in hotel to earn miles, or by using car rental services, or by shopping with member companies.
Redeem Miles: Redeem your Mileage Plus awards against miles in your membership account. Redeem air flight booking with your earned awards. You can make free ticket booking with United or Star Alliance airlines. Use your miles to redeem upgrade awards for your boarding class. You can also redeem services of non-airlines partners with these miles. Other awards include United mileage upgrade award, Star Alliance Upgrade Awards, Red Carpet Club memberships, etc.