▁del ays ▁in ▁New found land , ▁and ▁most ▁fl ights ▁returned ▁to ▁their ▁normal ▁schedule ▁within ▁the ▁day . ▁Air ▁Canada ▁said ▁their ▁fl ights ▁were ▁" subject ▁to ▁some ▁del ays ▁due ▁to ▁inc lement ▁weather , ▁un related ▁to ▁ash ▁cloud ." ▁On ▁T ues day , ▁ 2 0 ▁April , ▁two ▁Air ▁Canada ▁Jazz ▁fl ights ▁between ▁the ▁Mag d alen ▁Islands ▁and ▁Quebec ▁City ▁cancel led ▁stop - offs ▁in ▁G asp é ▁because ▁of ▁ash ▁over ▁the ▁Michel - P ou li ot ▁G asp é ▁Airport . ▁ ▁Att empt s ▁to ▁re open ▁air space ▁▁ ▁Most ▁air space ▁started ▁to ▁close ▁from ▁ 1 5 ▁April . ▁However , ▁in ▁the ▁days ▁following ▁there ▁were ▁brief ▁windows ▁free ▁of ▁the ▁cloud ▁at ▁different ▁locations ▁which ▁were ▁explo ited ▁to ▁make ▁a ▁few ▁aircraft ▁movements . ▁There ▁then ▁followed ▁test ▁fl ights ▁and ▁pressure ▁grew ▁to ▁re - evalu ate ▁the ▁criteria ▁for ▁safe ▁levels ▁of ▁ash ▁to ▁fly ▁through . ▁ ▁On ▁ 1 6 ▁April ▁a ▁ 3 0 - min ute ▁break ▁at ▁Manchester ▁allowed ▁two ▁fl ights ▁to ▁land , ▁and ▁one ▁aircraft ▁to ▁be ▁moved ▁to ▁Florida , ▁empty ▁( as ▁there ▁was ▁no ▁time ▁for ▁passengers ▁to ▁board ). ▁At ▁Glasgow , ▁an ▁Air ▁Trans at ▁flight ▁to ▁Toronto ▁took ▁off ▁while ▁a ▁British ▁Air ways ▁flight ▁from ▁New ▁York , ▁and ▁a ▁Thomas ▁Cook ▁flight ▁from ▁Or lando ▁and ▁I cel and air ▁fl ights ▁from ▁K