Via Reddit: http://www.reddit.com/r/travel/comments/1vmw3b/how_to_use_unitedcoms_farelock_for_free_how_to/ We all know United.com's Farelock is just another way for United to make a quick buck, well there is a free way of locking in a fare for Free and also a way to see how prices will increase. Put in the flight details of where you want to go and search Select your departure flight Select your returning flight Continue to traveler information Put in all the traveler information of those going on the flight and click accept and continue to seat assignments. Choose any seat available for your travelers on the departure and returning flights On the billing page, choose the payment option PAYPAL. Choosing any other option will not lock in your rate for free. Click Checkout. You will be brought to PayPal's landing page to log in. CLOSE the window and go back to United.com and go to "My Account". Under "My Reservations" you will see your reservation. Clicking the more button will show "This reservation is not ticketed. Complete this purchase now." NOTE: It is not known how long your fare is locked in for free, but if you continue to do the above process continually, it will eventually increase the price for that particular flight as you continue to block seats. NOTE(2): If you choose Economy Plus seats through the seat choosing process it will NOT block off those seats and they will be shown as available when you continue to go through the process over and over, but it WILL block out those normal economy seats. NOTE(3): It is not known if there is a way to get it so that the prices decrease. I was only able to get the prices to increase, please share if you find a way!