There's a possibility.

Seems more of a risk to transatlantic routes.

I don't know how easy it would be to reroute them though.

Yes, the London region already published a test advisory to verify that all systems are working. It illustrates what a real one could look like: https://www.metoffice.gov.uk/public/data/vaac/vag/pfxd01_egr...

The northern part of the Atlantic route system (EU-US) goes through there. And big parts of UK airspace could be affected.

Lol, I like it. I kinda wish we'd do that in software status pages too. "This is a test of our emergency status page. This is only a test. It's also the only time you'll actually see red on this page."

There’s always a chance, although the annual eruptions over the past three years had a negligible impact on air travel.

The eruption site is only around 20 km (12 mi) from Iceland's main international airport, Keflavik International Airport. Due to the eruption's effusive nature with little to no ash production, it is not considered a risk to air traffic. [1]

[1] https://en.m.wikipedia.org/wiki/Fagradalsfjall

Wasn't there another problem this time, that the eruption site is close to the geothermal plant that powers Keflavik?

At least that would only affect traffic from/to Iceland and not half of Europe though.

Iceland has a small population and a large power grid. They can survive a lot of power generation failing before things like airports start losing power.

[delayed]

The Iceland airport is close to this potential volcano, so it's clearly disruptable.

A big Atlantic Air travel disruption like in 2010 is always possible, but real unlikely.