Travel management consultants Runzheimer International has predicted a rise of 4.5% in costs in 2008.
The increase would be lower compared with the rise in 2007, the US company said in its annual business travel forecast
Runzheimer said it expected air fares, hotel rates and meals all to rise by 5%.
It attributed the "small" rise in air fares to the pressure of low cost carriers while the similarly low hotel rate rise was due "primarily to buyers' resistance to price escalation."
It added: "Strategies such as downgrading room types will likely be used if negotiation strategies fail to control lodging prices."
On meals Runzheimer cited new developments, including a change in eating habits and more hotels offering "complimentary breakfasts."
But it also said "a growing number of companies is negotiating meal prices in frequently-visited locations and implementing corporate policy caps for meal expenses to help control costs."
It also forecast a 3% rise in car rental prices "due in part to dampened corporate demand."
But it added that high fuel costs and companies making travellers aware of alternative commuting methods to stop unnecessary hiring of cars.
Phyllis Schumann, product manager for travel management services at Runzheimer, said: "Legacy airline pricing power has been significantly diminished over the years.
"In past years the differences between legacy airlines and low cost carriers were noticeable, but today those differences are for the most part absent or undetectable."
Finnair to focus on Europe-Asia growth
Finnair it to focus on growing its Europe-Asia market over the next ten years.
The Finnish national carrier said that it could be carrying 3m passengers a year on routes between Europe, Asia and North America by 2017.
Jukka Hienonen, Finnair's president and ceo, said the airline would exploit Helsinki's "geographical location even more extensively.”
He added: "In years to come, the airspace and terminal facilities of large European airports are likely to become increasingly congested while Helsinki-Vantaa Airport has plenty of room for construction and possibilities for development."
Mr Hienonen said that in recent years, the Asia-Europe market had grown by about 6% a year while "Finnair's annual growth has been in excess of 20%, delivering consistent market share gains in Europe-Asia traffic."
He said there would also be co-operation between Finnair and its "interesting" oneworld alliance partners in Asia.