Orlando International Airport hit the hardest by Southwest computer outage

Southwest Airlines travelers experienced delays and cancellations Tuesday and Wednesday because of technical issues.

"We don’t know when we’re supposed to be here, when we’re supposed to be boarding, what time were going to make it home," traveler Alexiss Boyston said.

According to Southwest, issues with a third-party weather data provider and a reservation computer glitch caused them to start grounding flights Monday night.

MORE NEWS: Portillo's opens in Orlando: How they build the perfect hot dog, chocolate cake shake

"We arrived here to take an 8:30 flight (Tuesday) night," Beth Sidel said. "We had two delays. Finally, at midnight, we were all on the plane and they cancelled it and sent us all out."

Sidel and her husband had to spend the night at Orlando International Airport because of the problem.

"We had a nonstop today but now we have to go through this to Atlanta then wait til 2:40 this afternoon to get another flight," Sidel said.

Southwest tells FOX 35 the problems are fixed now, but there were still long lines, delays and confusion Wednesday morning.

According to the airline tracker "Flight Aware," Orlando International was impacted more than any other by these issues.

"It’ll be a long time before I ever fly Southwest again," Sidel said. "We’re long time customers but this is just unsatisfactory."