When Jackie and Bobby Kennedy are in the hearse and Jackie quizzes the driver about previous assassinated presidents, Bobby is shown in closeup with his left hand completely flat against the side of his face with fingers fully extended. Following a jump cut to a medium shot, Bobby is now shown with his fingers curled up into his palm.
At 15:50 - where the limousine is first seen racing down the empty highway with JFK having been shot, the limo is on the right-hand carriageway, with the centre barrier on the left. Seconds later at 16:04 as the race to the hospital continues, they have miraculously jumped onto the left-hand carriageway with the central barrier on the right.
Jackie has the list of funeral attendants read out to her, including "Crown Prince George" of Denmark. Denmark at the time did have a Prince George, but he wasn't Crown Prince. Rather they had a Crown Princess, the later Queen Margrethe. And the only Danish dignitary who attended the funeral was the Prime Minister, Jens Otto Krag.
Jackie puts a record on an "automatic changer" which should start playing the first track on the record. What is heard is Richard Burton singing the song "Camelot" which is the fifth track on the first side of the original Broadway cast recording.
In a scene in Dallas, where Kennedy's limousine is rushing to the hospital immediately after the shooting, the sky overhead is cloudy and overcast. On November 22, 1963, the skies over Dallas were clear and sunny. (The overcast sky in this scene may be a symbolic choice by the director. Other scenes in the film that take place in Dallas on this same day show the skies as sunny and bright.)
Aboard Air Force One upon landing in Dallas, "Jackie" is looking into a mirror and putting on the pink pillbox hat as she recites a speech in Spanish. In reality, Jackie had already delivered that speech the previous evening in Houston when she and JFK made an appearance at a LULACS (League of United Latin American Citizens) gathering.
The doctor performing the autopsy has a stethoscope around his neck. Pathologists generally don't sport one.
After the scene when Jackie and Bobby talk on Air Force One, they exit the plane, and in 2 following shots leading to the rear boarding door the airplane windows are illuminated bright white resembling sunlight. In the shots before as Bobby greets Jackie on board, the windows are properly "blacked out" to mimic the actual time of day and lighting conditions at Andrews Air Force Base. In actual fact and in the stock footage shown directly outside the aircraft, it is pitch dark outside with only minimum artificial lighting provided on the tarmac which could not illuminate the outside of the windows in such a way.
The long views of the White House were actual views of the White House. But in the close up views of the north portico, with Jackie entering the car, it is obviously not the White House. There is too much heavy ornamentation on the wall and the doors and windows are not correct. And there are too many steps going down to the driveway, and the steps are too narrow. In reality there are only four steps down, and the steps stretch all the way across the portico.
During a long shot of the funeral march, road markings magically appear and disappear in a split second.
The White House Tour was broadcast on Valentine's Day 1962, not in 1961 as was shown in this film - that's why Mrs. Kennedy wore red. The documentary was titled "A Tour of the White House with Mrs. John F. Kennedy."
When Jackie is drinking vodka and taking pills in her bedroom, the Presidential Bedroom, and the Oval Office while listening to "Camelot" for the first time, she is drinking Russian-made Stolichnaya Vodka. It was not until 1972 that the brand was available in the USA, via an agreement through PepsiCo.
Towards the end of the movie, Jackie is looking out her limousine window and watches mannequins being set up in what appears to be store display windows with the words "The Hamilton" written on them. The Hamilton is a restaurant and concert venue, which opened in 2011. In the '60s there was an upscale department store named Garfinckel's in that location.
In the opening scene when the journalist pulls up at the compound of Jackie Kennedy's residence, the taxi had a side marker light, which did not appear on cars in the US till the 1968 model year. The scene was supposed to have taken place just a week after the assassination in November 1963.
The exterior location shots in Washington, DC were generally in the historically correct location, but made no attempt to recreate those landmarks accurately in period. For example, the funeral cortege passes the Riggs Bank building across from the Department of the Treasury, but the building signage is for SunTrust (the bank that currently occupies this space and didn't exist until 1985). As Jackie is leaving the White House and passes a department store removing her iconic fashions from the windows, the building is what in 1963 was the Garfinckel's Department Store, but the signage is for that of The Hamilton restaurant, which now occupies the spot. Similarly, no attempt is made to "retro" or disguise the current (2017) signage and identities of the any of the buildings the funeral cortege passes in downtown Washington.
When Jackie first turns on the phonograph, the ON switch clicks but the record does not start to rotate. It is a stack phonograph, so the record first has to drop down the spindle onto the turntable, which cannot be seen after the camera pans away. As she picks up her glass, two clunks are audible, then immediately the hiss of the needle on the record. Before the record started playing, there should actually have been two different noises from the record player: a clunk when the record dropped onto the turntable, then a click when the tone arm moved into position.
A shot from behind JFK's limousine as it speeds toward Parkland Hospital shows it traveling along US 40, which does not pass through Texas, but does run through Baltimore and its suburbs.
Robert Kennedy is seen smoking cigarettes - he didn't. He smoked cigars.
Robert Kennedy is shown wearing a wedding band - he didn't.
When Jackie exits the plane stairs in Dallas, she is handed a bouquet of red roses. However, on the plane after JFK's shooting, Jackie mentions the yellow roses she was given "everywhere."