Tui subsidiary operators are imposing surcharges for school ski holidays and adventure holidays due to increasing fuel costs and foreign exchange.
Some Tui companies are applying surcharges to travellers who believed they had already paid in full for their holidays in response to rising fuel costs and a fluctuating pound.
The Independent named SkiBound and Exodus as the two culprits, including a £13 additional cost per child for school winter sports trips.
A SkiBound spokeswoman, responding to the additional charge for school ski trips, said: “We are very conscious of the disruption that implementing a small surcharge causes to schools groups and regret having to pass even a small charge on to our groups.
“Our prices for this winter season are calculated in August 2010. Since that time we have seen significant cost increases arising from aviation, transportation fuel and other costs.”
The drop in the value of sterling prompted adventure operator Exodus to retrospectively increase the price of a departure to New Zealand next Saturday.
Travellers already booked on the £5,500 trip – offering trekking, kayaking and wildlife-watching – were asked for an extra £200.
A spokeswoman said: “We will incur extra costs of over £400 for trips operating in 2012 due to dramatic exchange rate changes, but half of this has been absorbed by Exodus and the other half will have to be paid by the clients as a currency surcharge.
“This works both ways though, and when we find cost savings these are also passed on to our clients.”
An operator can impose surcharges on holidaymakers who have already committed to a trip if it can demonstrate that costs have risen for reasons beyond its control but is required to absorb the first 2% of any increase.
If the surcharge exceeds 10% of the holiday cost then the customer is entitled to cancel with a full refund.