Page 41 of CoC, part 2 (c):
http://content.united.com/ual/asset/COC26Mar10final.pdf
REFUNDS - INVOLUNTARY UA RULE: 0260
(A) THE AMOUNT UA WILL REFUND UPON SURRENDER OF THE UNUSED PORTION OF THE PASSENGERS TICKET PURSUANT TO RULE 35 (REFUSAL TO TRANSPORT) (OR) RULE 50 (ACCEPTANCE OF CHILDREN) OR RULE 240 (FAILURE TO OPERATE ON SCHEDULE OR FAILURE TO CARRY) WILL BE:
(1) IF NO PORTION OF THE TICKET HAS BEEN USED: AN AMOUNT EQUAL TO THE FARE AND CHARGES PAID. EXCEPTION: UA SHALL NOT BE OBLIGATED TO REFUND ANY PORTION(S) OF A FULLY UNUSED TICKET WHICH
DOES NOT REFLECT A CONFIRMED RESERVATION ON A UA FLIGHT INVOLVED IN A SCHEDULE IRREGULARITY UNLESS SUCH TICKET WAS ISSUED BY UA.
(2) IF A PORTION OF THE TICKET HAS BEEN USED:
(A) UNINTERRUPTED FARE COMPONENT(S) FOR UNFLOWN SEGMENT(S) - THE AMOUNT EQUAL TO THE FARE AND CHARGES PAID FOR THE UNINTERRUPTED FARE COMPONENT WILL BE REFUNDED.
(B) INTERRUPTED FARE COMPONENT - THE FARE FOR THE UNFLOWN SEGMENT OF AN INTERRUPTED FARE COMPONENT WILL BE CALCULATED FROM THE POINT OF TERMINATION TO THE DESTINATION NAMED ON THE TICKET, NEXT STOPOVER POINT OR POINT WHERE AIR TRANSPORTATION WILL BE RESUMED VIA:
(I) THE ROUTING SPECIFIED ON THE TICKET IF THE POINT OF TERMINATION WAS ON THE ROUTING OF THE TICKET OR
(II) IF THE POINT OF TERMINATION WAS NOT ON THE ROUTING SPECIFIED ON THE TICKET, THE DIRECT ROUTING OF ANY CARRIER OPERATING SERVICE BETWEEN SUCH POINTS.
(
C) THE AMOUNT OF REFUND OF AN INTERRUPTED FARE COMPONENT WILL BE CALCULATED BY DIVIDING THE NORMAL COACH (Y) FARE BETWEEN THE POINT OF TERMINATION AND THE PASSENGERS DESTINATION OR NEXT STOPOVER POINT BY THE SUM
OF THE NORMAL COACH (Y) FARE PUBLISHED BETWEEN THE POINT OF ORIGIN AND THE POINT OF TERMINATION AND THE POINT OF TERMINATION AND THE PASSENGERS DESTINATION OR NEXT POINT OF STOPOVER. MULTIPLY THE AMOUNT OF THE PAID FARE COMPONENT BY THE RESULTING PERCENTAGE TO DETERMINE THE VALUE OF THE UNFLOWN PORTION OF THE INTERRUPTED FARE COMPONENT.
EXCEPTION: UA SHALL NOT BE OBLIGATED TO REFUND ANY PORTION(S) OF A TICKET WHICH DOES NOT REFLECT A CONFIRMED RESERVATION ON A UA FLIGHT
United Air Lines, Inc. 41 Updated: 3/26/2010
INVOLVED IN A SCHEDULE IRREGULARITY UNLESS SUCH TICKET WAS ISSUED BY UA.
(D) THE AMOUNT OF REFUND WILL NOT EXCEED THE FARE COMPONENT FOR THE PORTION OF THE TICKET FROM THE LAST POINT OF STOPOVER TO THE NEXT POINT OF STOPOVER OR FINAL DESTINATION.