<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by silverpie:
If it goes up after you've bought the ticket, you are on the hook for the difference! </font>

<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Changes in Fares or Rules
The fares, charges or rules applicable to any transportation shall be those in effect at the time of commencement of transportation (i.e. use of the first flight coupon of a ticket or conjunction ticket for carriage). Once carriage has commenced, any change in fares, charges or rules does not affect the contract and may be disregarded, unless otherwise specifically provided. In case of any change (including changes due to an altered conversion rate) in fares, or new rules, effective between the day the ticket is issued and the day of commencement of travel, the passenger is required to pay the difference in the fare or he will be refunded such difference, as the case may be.

By way of exception, tickets for international travel commencing in the Russian Federation, which have been issued in the Russian Federation with a firm reservation for at least the first international sector and which have been paid for before notification of a fare change shall be accepted for travel without reassessment of the fare provided original reservation is not changed after the date of notification of the fare change. A contract of carriage (ticket) is therefore subject at all times to a change in fares, charges or rules between the time it is purchased and the day of departure.</font>