kd5zex

When you miss your flight "unintentionally", UA usually has the courtesy to reschedule you, but you should report on the same time or some time sooner than 4 days. When you call, you better have a good reason for missing a flight 4 days ago and just respond to it now.

For refundable fare, if it was a one way ticket, you could refund (cash) the ticket back before travel commence. I believe your ticket was a round trip ticket, so I am not sure how it would work. But nevertheless, when you miss your flight without making prior arrangement, it's like forfeiting the ticket.

Here's the fare rule:
[BK CODE]
Y -

[PENALTY]
CANCELLATIONS ANY TIME CANCELLATIONS PERMITTED. NOTE - -- EXCHANGE - CHANGE
TO 1ST TICKETED FLIGHT / WHOLLY UNUSED TICKET -- RESIDUAL VALUE
MAY BE REFUNDED OR APPLIED TOWARD PURCHASE OF NEW TICKET AT CURRENT
FARE LEVELS ANY DIFFERENCE IN FARE/TAX IS COLLECTED AT TIME OF TICKET
ISSUANCE. CHANGES ANY TIME CHANGES PERMITTED. NOTE - A. CHANGES MADE
TO OTHER THAN THE FIRST TICKETED FLIGHT - -- THE FARE LEVELS IN EFFECT
A THE TIME OF ORIGINAL TICKET ISSUE WILL APPLY - ALL PROVISIONS OF
ORIGINAL TICKETED FARE APPLY. -- IF THE NEW ITINERARY QUALIFIES FOR
THE ORIGINAL TICKETED FARE BUT RESULTS IN A HIGHER FARE - COLLECT DIFFERENCE
IN FARE/TAX //OR// RESULTS IN A LOWER FARE REFUND DIFFERENCE
IN FARE/TAX TO ORIGINAL FORM OF PAYMENT AT THE TIME OF REISSUE. --
CHANGE MADE TO OTHER THAN THE FIRST TICKETED FLIGHT RESULT IN THE NEW
ITINERARY NO LONGER QUALIFYING FOR THE ORIGINAL TICKETED FARE - THE
FULL VALUE MAY BE APPLIED TOWARD AN EQUAL OR HIGHER QUALIFYING FARE --
USING FARES IN EFFECT OF THE ORIGNAL TICKET DATE COLLECT DIFFERENCE
IN FARE/TAX AT TIME OF REISSUE