We take a look at the odds for the 23 teams who have already sealed their place at Russia 2018.
Russia - 33/1
No permutations or play-offs to worry about for the hosts as they prepare to welcome the world to their backyard next summer.
Brazil - 6/1
Five-time winners were the first to qualify, continuing their unique run of having been involved in every World Cup finals.
Iran - 250/1
A run of 12 successive clean sheets for Carlos Queiroz's men was only ended after their qualification had already been confirmed.
Japan - 100/1
Delivered qualification by beating Australia 2-0 when Leicester's Shinji Okazaki, Borussia Dortmund's Shinji Kagawa and ex-AC Milan midfielder Keisuke Honda were all left out.
Mexico - 66/1
Led the way in the CONCACAF preliminaries and could start planning for Russia with three games to spare.
Belgium - 14/1
Roberto Martinez's side were the first from Europe to guarantee top spot in their group and their golden generation - featuring a host of Premier League stars - will be fancied to do well next summer.
South Korea - 250/1
Heading for their ninth consecutive World Cup and, of those who have already qualified, only Brazil, Germany, Argentina and Spain have made it to more in succession.
Saudi Arabia - 500/1
A superior goal difference of +7 to Australia's +5 meant the Saudis advanced and the Socceroos were left with two play-offs to negotiate.
Germany - 5/1 joint fav
Reigning champions and joint favourites were the only country to go through qualifying with a 100 per cent record and their goal difference from 10 qualifiers was +39.
England - 20/1
For all their major tournament failures, the Three Lions are usually convincing during the preliminaries and so it proved again after a kind group draw pitted them with the likes of Slovakia, Scotland and Slovenia.
Spain - 15/2
Managed to make it through despite being paired with Italy and the 2010 winners will have a point to prove after a disappointing campaign in Brazil.
Nigeria - 150/1
Arsenal's Alex Iwobi got the winner against Zambia as the Super Eagles became the first nation from Africa to punch their ticket.
Costa Rica - 250/1
Secured their spot with one game to spare thanks to a late strike from Kendall Waston earning them a draw against Honduras.
Poland - 66/1
No player has scored more than Robert Lewandowski's 16 goals in qualifying - a big reason why the Poles topped their group. The presence of Lewandowski and the fact Poland will be among the top seeds in Russia means they could be a lively dark horse at a big price.
Egypt - 300/1
The Pharaohs, whose last World Cup appearance was in 1990, sealed their passage in dramatic fashion when Liverpool's Mohamed Salah converted a stoppage-time penalty.
Iceland - 200/1
With a population of just over 335,000 people, the Euro 2016 quarter-finalists are the smallest ever nation to qualify for a World Cup.
Serbia - 100/1
Had the fewest points of all of the European group winners but benefited from Wales, the Republic of Ireland and Austria all taking points off each other.
France - 5/1 joint fav
A defeat to Sweden and a home draw with Luxembourg meant they were in danger of being overhauled by Sweden at one point, but the joint favourites topped the group and will take a fearsome squad to Russia.
Portugal - 20/1
Euro 2016 winners ended Switzerland's 100 per cent qualification record with a 2-0 success on Tuesday that ensured Cristiano Ronaldo will be in Russia as the 20/1 shots bid for the Euro-World Cup double.
Uruguay - 40/1
Would have taken a remarkable series of results on Tuesday for the two-time champions to miss out and Luis Suarez scored twice as they beat Bolivia to secure second spot behind Brazil in CONMEBOL qualifying.
Argentina - 8/1
Facing the possibility of elimination, Lionel Messi rose to the challenge with a hat-trick against Ecuador and Peru's draw with Colombia and Chile's defeat to Brazil sent Argentina through.
Colombia - 25/1
Snatched the last available spot for South American nations with a 1-1 draw against Peru, though had Chile drawn with or beaten Brazil it would not have been enough.
Panama - 500/1
A debut World Cup finals appearance for Panama was confirmed with victory over Costa Rica and the United States' loss to Trinidad and Tobago.