Game times for each contest will be announced at a later date. 2016 was the first year that Twickenham Stadium was used, and two more games were played there in 2017. There's the potential of playing in Mexico City, either against the Rams or Chargers, who are awaiting the construction of their joint stadium in Inglewood, Calif. that's scheduled to open for the 2020 season.
Waller, NFL executive vice-president of events and worldwide, said: "I think we are ready, we have definitely learned a lot in the 11 years we have been doing this".
"We continue to be very excited by the growth of the NFL in the UK", NFL commissioner Roger Goodell said. October 14 will mark the Seahawks' first appearance in a London game.
The Raiders playing a 2018 game in London was a terribly kept secret, one NBC Sports Bay Area's Greg Papa discussed months ago on The Happy Hour.
The Seahawks vs. Raiders matchup will be the NFL's debut game played at the new Tottenham Hotspur venue.
The full regular season schedule isn't typically announced until April.
"Since we last visited London in 2008, the NFL's popularity has continued to grow in the United Kingdom", said Chargers President of Business Operations A.G.
The Jaguars' sixth trip to London in 2018 will feature an opponent making their first trip overseas.
The most brutal stretch came in Weeks 2-4, when the Dolphins went to Los Angeles, New York and London for consecutive games.
27 at EverBank Field and the Jaguars usually don't play at home the week before because of the stadium retrofitting.
Ticketing details will be announced by NFL UK on January 18.