There are three qualifying rounds and then a final play-off round before the group stage, with Scottish champions Celtic entered into the second qualifying round, along with Irish side Dundalk. They will be seeded in every qualifying round they play.
Rangers will begin their competitive campaign against a side that finished fourth in the Luxembourg championship last season, 21 points behind league winners F91 Dudelange.
Arsenal's fifth-place finish meant they missed out on the Champions League and instead earned an automatic place in the Europa League group stage.
Mosquitoes with West Nile virus found in New York City
TCPH is reminding residents of the importance of taking personal protective measures to safeguard against West Nile Virus . The first Tarrant County case comes almost a month early when compared the first case a year ago which came in mid July.
Ballymena United will also face Norwegian opposition in Odd.
Welsh Cup winners Bala Town were drawn against Vaduz of Liechtenstein while Derry City will play Danish outfit Midtjylland.
For only the second time in the club's history, Rijeka will have a chance this summer to qualify for the UEFA Champions League.
Saints play the first leg at their Park Hall home on 27 June, with the return leg on 4 July played in Portugal.