Hi,
Below is the Penalties section of the Fare rules from a United ticket I plan to purchase. The outbound flight is from Europe to the United States.

Does anyone understand whether there is a change fee for changing the date of the flight? Of course, I understand there may be a fare difference.

Thank you!


PENALTIES
NOTE - -- HALF ROUNDTRIP COMBINATION OF NON-REFUNDABLE / REFUNDABLE WITH A CANCELLATION PENALTY / FULLY REFUNDABLE - - THE MOST RESTRICTIVE CANCELLATION PENALTY RULE APPLIES TO THE ENTIRE PRICING UNIT OF A WHOLLY UNUSED TICKET -- CANCELLATIONS ANY TIME TICKET IS NON-REFUNDABLE IN CASE OF CANCEL/NO-SHOW. NOTE - -- NON-REFUNDABLE APPLIES TO ADULT / CHILD / INFANT WITH A SEAT -- RESERVATIONS MUST BE CANCELLED BEFORE ORIGINAL SCHEDULED FLIGHT OR TICKET HAS NO VALUE IF NO-SHOW -- YR / YQ INTERNATIONAL SURCHARGE ON NON-REFUNDABLE FARE TICKETS - WILL NOT BE REFUNDED -- TAX/FEE/CHARGE - US/ZP/XF - ON NON-REFUNDABLE FARE TICKETS - WILL NOT BE REFUNDED -- THE OPTIONAL PAYMENT CHARGE WILL NOT BE REFUNDED -- WHEN PASSENGER CANCELS A WHOLLY UNUSED TICKETED FLIGHT RESERVATIONS PRIOR TO THE TICKETED DEPARTURE TIME / THE TICKET VALIDITY FOR A WHOLLY UNUSED TICKET // TRAVEL MUST BEGIN WITHIN ONE YEAR OF THE ORIGINAL TICKET ISSUE DATE // EXCEPTION-FOR TICKETS ISSUED ON/BEFORE 12/31/22 TRAVEL MUST COMMENCE 12/31/23 -- FULL VALUE OF A WHOLLY UNUSED TICKET MAY BE APPLIED TOWARDS THE PURCHASE OF A NEW TICKET PRICED AT-CURRENT-QUALIFYING EQUAL OR HIGHER FARE LEVELS AND ANY DIFFERENCE IN FARE/ SURCHARGE/TAXES/FEES/CHARGES WILL BE APPLICABLE AT TIME OF EXCHANGE ///SOME EXCLUSIONS APPLY/// -- -- THE NON-REFUNDABLE CANCELLATION AMOUNT OF THE TICKET BEING EXCHANGED REMAINS NON-REFUNDABLE AND CARRIED FORWARD IN THE ENDORSEMENT BOX OF THE NEW TICKET -- WHOLLY UNUSED TICKET / CHANGE TO 1ST TICKETED FLIGHT COUPON -- BEFORE DEPARATURE OF JOURNEY CERTAIN DOMESTIC REISSUE PROVISIONS MAY BE OVERRIDDEN BY THOSE OF UA INTERNATIONAL FARES -- CHARGE ADMINISTRATIVE FEE EQUAL TO CHANGE FEE -- PENALTY WILL NOT APPLY TO INFANT WITHOUT A SEAT -- APPLY CAT19 PROVISIONS FOR INTANT WITH A SEAT / CHILD -- REPRICE USING CURRENT QUALIFYING FARES -- 1. UA/LH/LX/OS/SN/AC FARES ARE USED 2. NEW TKT HAS EQUAL OR HIGHER VALUE THAN PREVIOUS TKT 3. ADV RES IS MEASURED FROM REISSUE DATE TO DEPARTURE OF PRICING UNIT -- EQUAL OR HIGHER FARE - REFUND NOT APPLICABLE // CHARGE FULL ADMINISTRATIVE FEE ADD COLLECT FARE DIFFERENCE - IF APPLICABLE -- CHANGES ANY TIME CHANGES PERMITTED. NOTE - -- CHANGE TO 1ST TICKET FLIGHT COUPON OR USE OF WHOLLY UNUSED TICKET TOWARD NEW PURCHASE - SEE CANCELLATION SECTION -- APPLY CAT 19 PROVISIONS FOR INFANT WITH A SEAT / CHILD -- THE OPTIONAL PAYMENT CHARGE WILL NOT BE REFUNDED -- A. CHANGE MADE TO OTHER THAN FIRST TICKETED FLIGHT COUPON -- TICKET RESERVATIONS NOT BEING USED ARE TO BE CANCELLED PRIOR TO ORIGINAL SCHEDULED FLIGHT OR TICKET HAS NO VALUE. RETURN RESERVATIONS MAY BE SCHEDULED ANYTIME WITHIN TICKET VALIDITY. TICKET VALIDITY OF A PARTIALLY USED TICKET - TRAVEL WILL BE VALID FOR TRANSPORTATION FOR ONE YEAR FROM THE DATE ON WHICH TRANSPORTATOIN COMMENCES AT THE POINT OF ORIGIN AS DESIGNATED ON THE ORIGINAL TICKET OR TICKET HAS NO VALUE. -- TICKET MUST BE REISSUED AT SAME TIME WHEN VOLUNTARY CHANGE IS CONFIRMED -- IF CHANGES ARE MADE TO OTHER THAN THE FIRST TICKETED FLIGHT THE FARE LEVELS IN EFFECT AT TIME OF ORIGINAL TICKET ISSUE WILL APPLY PROVIDED THE NEW ITINERARY QUALIFIES FOR ALL THE PROVISIONS OF THE ORIGINALLY TICKETED FARE FAMILY / IGNORING ADVANCE RESERVATION OR TICKETING REQUIREMENTS -- KEEP THE FARE / SAME FARE BASIS CODE / SAME BOOKING CODE -- REPRICE USING CURRENTLY TKTD FARE 1. NO CHANGE TO 1ST FLIGHT COUPON/FARE BREAKS 2. UA FARES ARE USED 3. ALL RULE AND BOOKING CODE PROVISIONS ARE MET EXCEPT ADV RES-TKTG 4. ADV RES IS MEASURED FROM ORIGINAL TKT DATE TO DEPARTURE OF PRICING UNIT -- EVEN REISSUE / KEEP THE FARE -- CHANGE TO OTHER THAN 1ST TKTD FLIGHT COUPON - IF THE NEW ITINERARY DOES NOT QUALIFY FOR THE ORIGINALLY TICKETED FARE USING SAME BOOKING CODE/ DUE TO DAY OF WEEK TRAVEL / SEASONALITY -- -- REPRICE USING FARES IN EFFECT WHEN TKT WAS ISSUED -- APPLY CAT 19 PROVISION FOR INFANT WITH A SEAT/CHILD -- 1. NO CHANGE TO 1ST FLIGHT COUPON 2. ALL RULE AND BOOKING CODE PROVISIONS ARE MET 3. UA/LH/AC/LX/OS/SN FARES ARE USED 4. ADV RES IS MEASURED FROM ORIGINAL TKT DATE TO DEPARTURE OF PRICING UNIT -- WHEN CHANGE RESULTS IN FARE DIFFERENCE -- REFUND NOT APPLICABLE -- ADD-COLLECT FARE DIFFERENCE - IF APPLICABLE -- IF CHANGES BY THE PASSENGER NO LONGER QUALIFY FOR THE ORIGINALLY TICKETED FARE / DUE TO ORIGINAL BOOKING CODE NOT AVAILABLE OR ORIGINAL TICKETED FARE NO LONGER QUALIFIES - FULL VALUE OF THE ORIGINAL TICKET MAY BE APPLIED TOWARDS EQUAL OR HIGHER VALUE QUALIFYING FARE - USING FARES IN EFFECT ON THE ORIGINAL TICKETING DATE -- RECALCULATION TO LOWER FARE VALUE IS NOT PERMITTED -- FARE IS RECALCULATED FROM POINT OF ORIGIN OF JOURNEY / ANY DIFFERENCE IN FARE / TAXES / CHARGES AND CHANGE FEE CONTAINED IN THIS RULE WILL BE APPLICABLE AT TIME OF CHANGE / REISSUE -- REPRICE USING FARES IN EFFECT WHEN TKT WAS ISSUED -- APPLY CAT19 PROVISIONS TO INFANT WITH A SEAT / CHILD -- 1. NO CHANGE TO 1ST FLIGHT COUPON 2. UA/LH/AC/LX/OS/SN FARES ARE USED 3. NEW TKT HAS EQUAL OR HIGHER FARE VALUE THAN PREVIOUS TKT 4. ALL RULE AND BOOKING CODE PROVISIONS ARE MET 5. ADV RES IS MEASURED FROM ORIGINAL TKT DATE TO DEPARTURE OF PRICING UNIT -- WHEN CHANGE RESULTS IN FARE DIFFERENCE -- ADD COLLECT FARE DIFFERENCE-IF APPLICABLE