Aug 2 (Reuters) - Airlines are avoiding Iranian and

Lebanese airspace and cancelling flights to Israel and Lebanon,

as concerns grow over a possible conflict in the region after

the killing of senior members of militant groups Hamas and

Hezbollah this week.

Singapore Airlines on Friday appeared to no longer be using

Iranian airspace for any of its routes, according to flight

tracker Flightradar24. The airline did not respond to a request

for comment.

Taiwan's EVA Air and China Airlines also appeared to be

avoiding Iran airspace for flights to Amsterdam on Friday which

previously had flown over Iran, Flightradar24 data showed.

The airlines did not immediately respond to a request for

comment on the route changes.

In a bulletin, OPSGROUP, a membership-based organisation

that shares flight risk information, advised traffic between

Asia and Europe to avoid Iranian and Iraqi airspace, a day after

sources told Reuters that top Iranian officials will meet the

representatives of Iran's regional allies from Lebanon, Iraq and

Yemen to discuss potential retaliation against Israel.

Many airlines, including U.S. and European airlines, already

avoid flying over Iran, especially since the reciprocal missile

and drone attacks in April between Iran and Israel.

Singapore Airlines' flight to London Heathrow early on

Friday went north of Iran through Turkmenistan and Azerbaijan,

rather than crossing through Iran as it did the day before,

Flightradar24 showed.

However, a significant number of airlines on Friday were

still flying over Iran, including United Arab Emirates carriers

Etihad, Emirates and FlyDubai, as well as Qatar

Airways and Turkish Airlines.

Over the past two days, Air India, Germany's

Lufthansa Group, U.S. carriers United Airlines

and Delta Air, and Italy's ITA Airways said they had

suspended flights to Tel Aviv.

Airlines this week have also been cancelling and delaying

flights to the Lebanese capital Beirut after a strike in the

Israeli-occupied Golan Heights on Saturday. Israel has blamed

the attack on Lebanon-based armed group Hezbollah, which denied

involvement.

Canada on Thursday issued a notice to Canadian aircraft to

avoid Lebanese airspace for one month due to the risk to

aviation from military activity.

Britain has for the past month advised pilots of potential

risk from anti-aircraft weaponry and military activity in

Lebanon's airspace.

Should an all-out war break out in the Middle East, OpsGroup

said civil aviation will likely face the risk of drones and

missiles crossing airways, as well as the increased risk of GPS

spoofing - a growing phenomena around Lebanon and Israel where

militaries and other actors broadcast signals that trick a

plane's GPS system into thinking it is somewhere it is not.

(Writing by Lisa Barrington; editing by Miral Fahmy)