The Dufton Europa plane crash landed in a field in Maidwell on Thursday afternoon.
Emergency services were called to the field, but found an empty plane.
Ambulance crews found the pilot Iain McKay and his wife, of Houghton Regis, Bedfordshire, at the The Stags Head, where they had walked after the ordeal.
Simon Nixon, the manager of the pub, said: "A lady came in her with her husband. It was not until she ordered a drink (non-alcoholic) that she said she was a bit shaken up because she'd just had a plane crash. I asked if she was OK and she had a little bit of a cut to her arm. Other than that she seemed OK.
"It's not often you have plane crashes where people are able to walk away."
An off duty policeman alerted the ambulance crews of the couple's whereabouts.
An East Midlands Ambulance Service spokeswoman said an ambulance and an air ambulance went to the accident at about 16:30 BST.
"Both patients were found away from the aircraft and were checked over by the doctor but didn't require any further treatment," she said.
The Air Accident Investigation Branch has yet to comment.

The Welsh side lost their Challenge Cup crown after a 1-0 overtime loss to Nottingham Panthers in Sunday's final.
The Devils have also been leapfrogged by Sheffield Steelers at the top of the Elite League after three consecutive defeats, but Bowns remains confident of silverware.
"We are the best team in the league, so why not?," he said.
"If we play like we can, stick to these systems [then] we are going to do it.
"There is not one player in this league that I would swap for anyone in our dressing room," added Bowns, who turned away an impressive 47 of the 48 shots he faced on Sunday.
Andrew Lord's side can still win three trophies this season - the Devils are second in the Elite League and have a game in hand on the Steelers, who are two points ahead with four games to play before the play-offs begin.
The Welsh side, who have five games left, are also top of the Erhardt Conference.
Despite Evan Mosey's late winner for Nottingham at the Sheffield Arena, which came just two days after the Panthers had beaten the Devils 6-1 in the league, Bowns is backing his side to return to their best.
"The commitment is there, the effort levels are there," Bowns told BBC Wales Sport.
"Maybe we need to be a little more clinical in the defensive zone and offensive zone, but that is about it.
"If everyone just does what they can, then we are not going to have a problem."
Devils player-coach Lord says he was "very proud" of his side's performance, but admits they struggled in overtime, as the Panthers looked fresher with the teams playing four-on-four during sudden-death.
"[I] should have had the boys better prepared for the four-on-four, we are not used to that format. They kind of just hemmed us in.
"For whatever reason, we have lost our legs a little bit the last 10 days, two weeks.
"Maybe I need to look at our training a little bit, evaluate that, because we need to get our legs back."
A couple who were in a light aircraft that crashed in a Northamptonshire field escaped unhurt and were found by ambulance crews in a nearby pub.
[NEXT_CONCEPT]
Cardiff Devils are still the best team in ice hockey's Elite League, says netminder Ben Bowns.