I believe the movie you are talking about is called Thrill Seekers (1999), it's also known as The Time Shifters.
The wikia states this.
Tom Merrick (Van Dien) works as a TV reporter when he's nearly killed
in an accident while informing about a fire in the Evanston power
plant. After directing his crew to take another position he spots a
creepy-looking man, causing him to stay behind. This accidentally
saves his life as the crew is killed in the partial collapse of a
After some time, he decides to do some research on catastrophes for a
documentary he's preparing when he accidentally stumbles upon several
pictures of the man he saw at the power plant (Richings), who appears
to turn up in different disasters (sinking of Titanic, Hindenburg
disaster and hurricane Hugo) as far apart as 50 years, but who still
looks the same in all the pictures.
As his boss Eleanor hopes for a good story she books Merrick a flight
to Washington, D.C. to get the original photographs from the author.
When on the plane, he again spots the man from the power plant
disaster and checks his luggage. He finds a flyer and discovers a
futuristic enterprise—Thrill Seekers—will make time travel possible in
the year 2070 and will sell trips to the past. These trips consist of
travellers going straight to a catastrophe right before it happens, so
they can experience the emotion but are able to travel back in time
again before they get killed.
The main character ends up using knowledge of future events to save people, including his own life.
Which is worse, Merrick finds out that the Flight 222 he is on will be
involved in a mid-air collision, killing everyone on board.
Thanks to that knowledge, Merrick forces the pilots to change the
course of action which saves a plane from crashing and killing
hundreds of people. The mysterious man disappears before landing.
Merrick is arrested by the FBI with the charge of plane hijacking
attempt. Agent Baker is sure about the hijacking attempt while his
younger assistant, Agent Stanton believes Merrick's story. However,
Merrick's knowledge of the future disasters causes the changes in the
future so the company Thrill Seekers sends two agents to the past to