Liverpool and Fulham's Europa League semi-finals will go ahead on Thursday.
The first legs had been in doubt because of the cloud of volcanic ash that has drifted from Iceland and grounded flights across Europe.
However, Uefa said Liverpool's match at Atletico Madrid in Spain and Fulham's trip to German club Hamburg will both be played as scheduled.
Both clubs have contingency travel plans in place should they be unable to fly to their destinations.
Restrictions on UK flights will remain in place until at least 0100 BST on Tuesday, air traffic control body Nats said on Monday.
A statement on the London club's website read: "At this stage the club still cannot confirm whether the planes scheduled to depart on Wednesday and Thursday to transport fans and media will be able to travel, and is in regular dialogue with the aviation authorities to enable it to inform all parties at the earliest opportunity when a decision is made."
Fulham manager Roy Hodgson was understandably keen for his team to avoid a road trip and claimed the 570-mile journey to the northern German port would be a "disaster" for the 2,500 Fulham fans who have bought tickets for the game.
"It would be a real shame," said Hodgson. "For 30 or 40 people you might find train seats but for the 2,500 who have been really looking forward to this game then it's different."
Liverpool's players and fans have a 1,200-mile road trip to contemplate to reach Spanish capital Madrid for their match against Atletico.
Uefa has already announced the Champions League semi-finals will go ahead on Tuesday and Wednesday.
Barcelona are travelling 450 miles by coach over two days to Italy for Tuesday's first leg against Inter Milan, while French side Lyon will make a 360-mile road trip for their tie at Bayern Munich on Wednesday.
Pep Guardiola, coach of European champions Barca, stated: "It wouldn't be the best but there are teams from the lower leagues that travel 17 hours by bus.
"A semi-final is enough to help anyone get over any tiredness."
Meanwhile, Newcastle have been forced to make the 400-mile journey to Plymouth for Monday's Championship clash by coach.