I’m no longer flying but I’ve witnessed GPS jamming and unless things have changed the MSM reports are very overblown, and I would not be using the word dangerous.
Yes it can be a problem and can restrict some of the operational aspects of a flights but GPS jamming does not mean you are lost or weaving all over the sky.
I guess at this point you can either skip to my conclusion but for anyone interested here’s a short background to this (aka TLDR):
The Russians have been jamming GPS in some places for years (Eastern Med near Syria) or for a couple of years around the Baltic.
They are not targeting specific aircraft ( certainly not just “British Jets” or however the DM likes to describe it), they simply jam the GPS signal to everybody over a large area.
However airliners have several sources of getting navigational information, not just GPS, so if the aircraft monitoring systems sense the GPS is jammed they automatically dump the GPS input and switch to using one of the alternatives to keep track of where it is, where it is going.
There’s usually a quick checklist to be run by the pilots to then up the automatic process but that’s about the sum of the drama on the flight deck.
The subsequent effects on the flight are aircraft type dependent but the main consequences tend to be that if GPS stays off you may not be able to use some airways (routes) and/or fly some types of bad weather instrument approaches to some runways at some airports but there are back ups to cater for that.
In reality you tend to get GPS back as soon as you are out of the jammed area and everything is back to normal.
Final point- GPS is relatively new - it was, and still is, possible to cross the Atlantic/Pacific flying predetermined routes to a high degree of accuracy without GPS…but it would be nice if the Russians stopped messing around with it.
Conclusion: there’s no reason to cancel a holiday because of GPS jamming…