Frontier Flight 538 from Denver landed at 10:30 p.m. ET, according to FOX 5 in D.C. No injuries were reported.
A Twitter user who claimed to be a passenger on the flight told WJLA-TV that the "plane Descended really fast, didn’t touch wheels to the runway until halfway down, two jarring sounds/bumps, a swerve into the grass where we dropped and stopped."
The Metropolitan Washington Airports Authority said in a statement that the Airbus A320 landed safely before coming to a stop and passengers would be bused to the terminal, according to WJLA.
One passenger tweeted the buses arrived after passengers remained on the plane for about an hour.
"Finally got off #Frontier at DCA so we legit were completely in the grass," Dasha Afanaseva tweeted. "This is the craziest thing!"
The runway was temporarily shut down so crews could assess the situation, FOX 5 reported.
"All passengers and crew were safely deplaned and transported via bus to the terminal at around midnight," MWAA said in an updated statement early Saturday. "The aircraft was then removed from the grass and towed to its gate. All runways have been reopened to air traffic, and there are no other operational impacts to the airport at this time. Please contact Frontier Airlines for further details and information."